CN117085515A - Preparation device of low-surface-energy anti-pollution hollow fiber membrane - Google Patents
Preparation device of low-surface-energy anti-pollution hollow fiber membrane Download PDFInfo
- Publication number
- CN117085515A CN117085515A CN202311260852.XA CN202311260852A CN117085515A CN 117085515 A CN117085515 A CN 117085515A CN 202311260852 A CN202311260852 A CN 202311260852A CN 117085515 A CN117085515 A CN 117085515A
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- fixedly connected
- mixing
- mixing barrel
- hollow fiber
- fiber membrane
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- 239000012528 membrane Substances 0.000 title claims abstract description 96
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 129
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 238000003756 stirring Methods 0.000 claims description 57
- 238000005491 wire drawing Methods 0.000 claims description 51
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 22
- 238000007790 scraping Methods 0.000 claims description 20
- 238000007664 blowing Methods 0.000 claims description 12
- 230000003373 anti-fouling effect Effects 0.000 claims description 10
- 238000013329 compounding Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 8
- 229920001002 functional polymer Polymers 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- ZVUAMUKZHFTJGR-UHFFFAOYSA-N 1-piperazin-1-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCNCC1 ZVUAMUKZHFTJGR-UHFFFAOYSA-N 0.000 description 73
- 238000001035 drying Methods 0.000 description 47
- 239000005052 trichlorosilane Substances 0.000 description 45
- 239000002994 raw material Substances 0.000 description 43
- 239000003054 catalyst Substances 0.000 description 34
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 33
- 239000002033 PVDF binder Substances 0.000 description 29
- 238000006243 chemical reaction Methods 0.000 description 28
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 28
- 239000000376 reactant Substances 0.000 description 28
- YERHJBPPDGHCRJ-UHFFFAOYSA-N 1-[4-(1-oxoprop-2-enyl)-1-piperazinyl]-2-propen-1-one Chemical compound C=CC(=O)N1CCN(C(=O)C=C)CC1 YERHJBPPDGHCRJ-UHFFFAOYSA-N 0.000 description 23
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 21
- 239000007788 liquid Substances 0.000 description 20
- 239000003999 initiator Substances 0.000 description 18
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 17
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 17
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 17
- 238000005406 washing Methods 0.000 description 17
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 16
- 230000007062 hydrolysis Effects 0.000 description 13
- 238000006460 hydrolysis reaction Methods 0.000 description 13
- 230000002829 reductive effect Effects 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 108091003079 Bovine Serum Albumin Proteins 0.000 description 10
- 238000007792 addition Methods 0.000 description 10
- 229940098773 bovine serum albumin Drugs 0.000 description 10
- 230000004907 flux Effects 0.000 description 10
- 239000001257 hydrogen Substances 0.000 description 10
- 229910052739 hydrogen Inorganic materials 0.000 description 10
- 238000001291 vacuum drying Methods 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 9
- 238000009987 spinning Methods 0.000 description 9
- 229920001007 Nylon 4 Polymers 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 238000007259 addition reaction Methods 0.000 description 7
- 235000003891 ferrous sulphate Nutrition 0.000 description 7
- 239000011790 ferrous sulphate Substances 0.000 description 7
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 7
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 7
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 230000003301 hydrolyzing effect Effects 0.000 description 6
- 239000003607 modifier Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 6
- 235000010265 sodium sulphite Nutrition 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 238000009210 therapy by ultrasound Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- -1 siloxane chain Chemical group 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000000614 phase inversion technique Methods 0.000 description 1
- 125000004193 piperazinyl group Chemical group 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229920000428 triblock copolymer Polymers 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0011—Casting solutions therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
- B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/10—Maintenance of mixers
- B01F35/12—Maintenance of mixers using mechanical means
- B01F35/123—Maintenance of mixers using mechanical means using scrapers for cleaning mixers
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/18—Formation of filaments, threads, or the like by means of rotating spinnerets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/42—Details of membrane preparation apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/39—Amphiphilic membranes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Textile Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of functional polymer materials, and particularly discloses a preparation device of a low-surface-energy anti-pollution hollow fiber membrane, which comprises a mixing barrel, wherein a rotating roller is rotatably connected to the central position inside the mixing barrel, a mixing device is arranged at the bottom of the outer surface of the rotating roller, and an auxiliary device is fixedly connected to the position, close to the top, of the inner surface of the mixing barrel; the top of the mixing barrel is provided with a cooling device; the top of the mixing barrel is fixedly connected with a power mechanism; the top end of the rotating roller penetrates through the top of the inner surface of the mixing barrel and extends to the outside, and the output end of the power mechanism is connected with the top of the outer surface of the rotating roller through the gear assembly; one end of the cooling device, which is far away from the mixing barrel, is provided with a film making device; the bottom of the mixing barrel is provided with a material conveying mechanism, the output end of the material conveying mechanism is communicated with the film making device, and the bottom of the inner surface of the mixing barrel is provided with a heater. The invention has the characteristics of higher mixing quality and better film casting effect.
Description
Technical Field
The invention relates to the technical field of functional polymer materials, in particular to a preparation device of a low-surface-energy anti-pollution hollow fiber membrane.
Background
The ultra-micro filter membrane separation technology is widely applied to purification of drinking water, advanced treatment of domestic sewage and industrial wastewater and material separation in certain industries. PVDF (polyvinylidene fluoride) is one of the most commonly used membrane materials, but has the defect of poor hydrophilicity, so that the water flux is low, the membrane pollution resistance is poor, and the pollution speed is high due to the special performance of the hollow fiber membrane. Therefore, the preparation and modification of the novel anti-pollution membrane become important means for solving the membrane pollution and improving the membrane flux.
In order to develop better anti-fouling film materials, a great deal of film modification work has been done by the skilled person in recent years. Blending modification of inorganic nanomaterials such as silica and titania; the hydrophilic groups such as hydroxyl, amino and the like are introduced by a grafting method, so that the anti-pollution performance and the like are improved. However, these technical methods have some problems, such as complex synthesis conditions of the nanomaterial and easy shedding of the surface grafted hydrophilic groups. Patent document with publication number of CN103755891A discloses an anti-pollution film filled with a siloxane-containing amphiphilic surface modifier and a preparation method thereof, wherein a siloxane chain segment modifier is generated by a polyethylene glycol-polymethoxy propylene-polyethylene glycol block copolymer and vinyl silicone oil in a certain proportion under an initiator, so that an anti-pollution film flat plate film is prepared, hydrophilization modification of a base film is realized, film holes are blocked to a certain extent by the modifier, and large-scale application is difficult to realize. Patent document with publication number of CN105709618A discloses a preparation method of polyvinylidene fluoride fiber membrane modified by amphiphilic triblock copolymer, wherein triblock amphiphilic copolymer is blended in casting solution, so that anti-pollution performance of the membrane is improved, and modifier poly (hydroxy ethyl methacrylate) is not precipitated on the surface of the membrane; however, the amphiphilic additive adopted in the patent is directly added, and the synthesis method of the amphiphilic polymer is not clear. The quality of the mixed materials in the preparation process is not high enough, and the film casting effect is not good enough.
Disclosure of Invention
The invention provides a preparation device of a low-surface-energy anti-pollution hollow fiber membrane, which aims to solve the technical problems of the existing anti-pollution membrane material and has the characteristics of higher mixing quality and better membrane casting effect.
The first technical scheme of the invention is as follows: the preparation device of the low-surface-energy anti-pollution hollow fiber membrane comprises a mixing barrel, wherein a rotating roller is rotationally connected to the central position inside the mixing barrel, a mixing device is arranged at the bottom of the outer surface of the rotating roller, and an auxiliary device is fixedly connected to the position, close to the top, of the inner surface of the mixing barrel; a cooling device is arranged at the top of the mixing barrel; the top of the mixing barrel is fixedly connected with a power mechanism; the top end of the rotating roller penetrates through the top of the inner surface of the mixing barrel and extends to the outside, and the output end of the power mechanism is connected with the top of the outer surface of the rotating roller through a gear assembly; a film making device is arranged at one end of the cooling device, which is far away from the mixing barrel; the bottom of the mixing barrel is provided with a material conveying mechanism, the output end of the material conveying mechanism is communicated with the film making device, and the bottom of the inner surface of the mixing barrel is provided with a heater;
the mixing device comprises a stirring plate, the edge of the outer surface of the stirring plate is fixedly connected with the bottom of the outer surface of the rotating roller, a mixing port is formed in the center of the outer surface of the stirring plate, one end, far away from the rotating roller, of the outer surface of the stirring plate is fixedly connected with a compression device, and the outer surface of the compression device is fixedly connected with a scraping blade; the stirring device is characterized in that a fin is rotationally connected to the outer surface of the stirring plate at a position close to the mixing port, a ball head pushing piece is fixedly connected to the outer surface of the fin, a deformable retainer ring is fixedly connected to the outer surface of the fin, and one side, away from the fin, of the outer surface of the deformable retainer ring is fixedly connected with the outer surface of the stirring plate. According to the invention, raw materials are added into a mixing barrel, and a rotating roller is driven to rotate by a power mechanism, so that a mixing device is driven to rotate and heated by a heater; the stirring plate in rotation mixes the raw materials, part of the raw materials pass through the mixing port, and the fin can rotate together with the stirring plate; when the pressure device is driven by the stirring plate to rotate, the scraping blade also rotates along with the stirring plate, interaction between the pressure device and the auxiliary device is utilized, the hanging material on the inner surface of the mixing barrel can be further removed, further mixing of raw materials is facilitated, mixing quality is high, the cooling device can be enabled to cool in time when the rotating roller is combined, further preparation of the membrane material by the follow-up membrane making device is facilitated, rotation of the scraping blade is fully utilized, and the structure is connected.
Preferably, the outer surface of fin sets up to the arc, the fin is provided with two sets of, and two sets of fin opposite directions, the surface edge of doctor-bar is laminated with the interior surface of compounding bucket. The outer surfaces of the combined fins are arc-shaped, the fins are provided with two groups, and the directions of the two groups of fins are opposite, so that the groups of fins rotate together, and further the mixing of raw materials is promoted; the outer surface edge of the combining scraping blade is attached to the inner surface of the mixing barrel, and the scraping blade scrapes residual scraping materials on the inner surface of the mixing barrel.
Preferably, the compression device comprises a cylinder body, one end fixedly connected with that the surface of cylinder body is kept away from the rotor roller with the surface of stirring board, the top sliding connection of cylinder body has the support depression bar, the top fixedly connected with pressurized magnetic ball of support depression bar, the bottom fixedly connected with elastic support spare of support depression bar, elastic support spare's bottom and the interior surface bottom fixed connection of cylinder body, the surface bottom of support depression bar is close to the position fixedly connected with swing time piece of compounding mouth.
Preferably, the top of the cylinder body is provided with a sliding hole matched with the outer surface of the supporting compression bar, and the outer surface of the cylinder body is provided with a sliding groove matched with the bottom of the outer surface of the supporting compression bar.
Preferably, the auxiliary device comprises a circular shell, the outer surface of the circular shell is fixedly connected with the outer surface of the mixing barrel, a guide rail groove is formed in the bottom of the circular shell, an arc-surface pressing plate is fixedly connected with the inner surface of the guide rail groove, and a vibrating device is arranged at the bottom of the inner surface of the circular shell.
Preferably, the cambered surface pressing plates are uniformly distributed on the inner surface of the guide rail groove, and the vibrating devices are uniformly distributed at the bottom of the inner surface of the circular shell. When the pressure device is driven by the stirring plate to rotate, the pressure magnetic ball is utilized to rotate under the limit of the guide rail groove, so that the rotation is stable, the rotating pressure magnetic ball is utilized to contact with the cambered surface pressing plate, the pressure magnetic ball is subjected to pressing force and is connected with the top of the barrel in a sliding manner when being combined with the supporting pressing rod and the top of the barrel, the supporting pressing rod can drive the swinging sub-piece to move downwards, the elastic supporting piece is compressed, when the rotating pressure magnetic ball is separated from the cambered surface pressing plate, and under the elastic force of the elastic supporting piece, the supporting pressing rod drives the swinging sub-piece and the pressure magnetic ball to move upwards for resetting, the swinging sub-piece is further enabled to reciprocate up and down, the upward and downward movement of the swinging sub-piece is facilitated, the outer surface of the swinging sub-piece is utilized to contact with the end part of the ball head pushing piece, the outer surface edge of the combining the tilting piece is in rotary connection with the outer surface of the stirring plate, the ball head pushing piece is enabled to be applied to the pushing force of the tilting piece, the tilting piece is enabled to rotate, the deformable retainer ring is compressed, and the swinging sub-piece is enabled to reciprocate when the pressing force is eliminated, the pressing force is combined with the deformable elastic supporting piece, the swinging sub-piece is enabled to move up and reset, and the reciprocating retainer plate is fully rotated, and the raw materials are fully mixed.
Preferably, the vibration device comprises a connecting rod, the bottom end of the connecting rod is rotationally connected with the bottom of the inner surface of the circular shell, a tension spring is fixedly connected to the bottom of the outer surface of the connecting rod, the bottom end of the tension spring is fixedly connected with the bottom of the inner surface of the circular shell, and a crescent magnetic block is fixedly connected to the top end of the connecting rod. When the pressed magnetic ball rotates, the cambered surface pressing plate can press the pressed magnetic ball in time; when the pressed magnetic ball is driven by the supporting pressure rod to move upwards to reset, the pressed magnetic ball and the crescent magnetic block are set to be the same-name magnetic poles, so that repulsive magnetic force is generated when the pressed magnetic ball and the crescent magnetic block meet, at the moment, the crescent magnetic block is pushed by reverse magnetic force and is rotationally connected with the bottom of the inner surface of the circular shell in combination with the bottom of the connecting rod, the crescent magnetic block is pushed to lift by the magnetic force, the tension spring is stretched, and continuously moves along with the pressed magnetic ball, the repulsive magnetic force disappears after the pressed magnetic ball is far away from the crescent magnetic block, and the crescent magnetic block is knocked to the bottom of the inner surface of the circular shell under the elastic tension of the tension spring, so that the circular shell vibrates and transmits vibration to the mixing barrel, and then raw materials are reduced to be adhered to the inner surface of the mixing barrel.
Preferably, the cooling device comprises a spherical cover, the bottom of the outer surface of the spherical cover is fixedly connected with the top of the mixing drum, the top end of the rotating roller extends to the inside of the spherical cover, the top end of the rotating roller is fixedly connected with a blowing blade, an air inlet hole is formed in the bottom of the outer surface of the spherical cover, a pipeline is fixedly communicated with the top of the spherical cover, one end, far away from the spherical cover, of the pipeline is communicated with a multi-claw air outlet, and the air outlet end of the multi-claw air outlet is fixedly communicated with the top of the film making device. When the rotating roller rotates, the mixing device can be driven to rotate, the stirring plate is promoted to mix far away, the blowing blades can be driven to rotate, the rotating blowing blades can blow air inside the spherical cover, negative pressure is formed inside the spherical cover, at the moment, external air enters the spherical cover from the air inlet hole, at the moment, air flows can be blown into the film forming device from the multi-claw air outlet under the conveying of the pipeline, further cooling is timely carried out, and the structure is connected together by means of the self-rotation.
Preferably, the film forming device comprises a box body, one end of the cooling device, which is far away from the mixing drum, is fixedly communicated with the top of the box body, a servo motor is fixedly connected to the bottom of the box body, a centrifugal wire drawing drum is rotationally connected to the inside of the box body, the bottom of the centrifugal wire drawing drum is fixedly connected with the output end of the servo motor through a coupler, the output end of the material conveying mechanism is communicated with the top of the centrifugal wire drawing drum through a rotating connector, a gel generator is fixedly connected to the top of the box body, a nozzle is fixedly connected to the inner surface of the box body, the output end of the gel generator is communicated with the output end of the nozzle, a support column is fixedly connected to the bottom of the inner surface of the centrifugal wire drawing drum, a wire drawing outlet is formed in the outer surface of the centrifugal wire drawing drum, and a ox horn puncture needle is fixedly connected to the inner surface of the wire drawing outlet. When raw materials are conveyed into the centrifugal wire drawing cylinder through the conveying mechanism, the centrifugal wire drawing cylinder in rotation drives the supporting column to rotate at the moment, so that the throwing piece rotates together, the throwing piece throws the falling raw materials evenly towards the inner surface of the centrifugal wire drawing cylinder at the moment, and when the raw materials are thrown out from the wire drawing outlet, the raw materials are punctured through ox horn puncture, so that the raw materials are uniformly drawn, the stress area can be reduced, the situation of raw material blockage is difficult to occur, and the preparation of a fibrous membrane is facilitated; when the material conveying mechanism conveys the mixed raw materials into the centrifugal wire drawing cylinder in the box body, the centrifugal wire drawing cylinder is driven by the servo motor to rotate rapidly at the moment, so that the raw materials in the centrifugal wire drawing cylinder are subjected to centrifugal force and thrown out from holes on the outer surface of the centrifugal wire drawing cylinder, and then stretched into filaments, membrane filaments are wound together to form a membrane, the cooling device cools in time, gel in the inner part is sprayed out from a nozzle by utilizing the gel generator, the gel is attached to the membrane filaments, the fluidity of the surface of a membrane is reduced, and a hollow fiber membrane is formed.
Preferably, the outer surface of the centrifugal wire drawing cylinder is conical, the diameter of the outer surface of the centrifugal wire drawing cylinder gradually increases from bottom to top, and the ox horn puncture needle is arc-shaped.
The second technical scheme of the invention: the preparation process of low surface energy antipollution hollow fiber membrane includes the following steps,
(S01) dissolving proper parts of trichlorosilane and 1, 4-diacrylyl piperazine in toluene;
(S02) adding a catalyst into the solution in the step (S01), and performing a silicon-hydrogen bond addition reaction to obtain 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine;
(S03) washing and drying the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine obtained in the step (S02);
(S04) dispersing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine dried in the step (S03) in water, and hydrolyzing to obtain 1-acryloyl-4- (3-trihydroxy silicon based) acryloylpiperazine;
(S05) washing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S04), and drying for later use;
(S06) dispersing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine dried in the step (S05) in water, adding a catalyst and an initiator under the protection of nitrogen, and reacting to obtain the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine;
(S07) washing the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S06), and drying for later use;
(S08) taking a proper amount of polyvinylidene fluoride, polyvinylpyrrolidone and the polyacrylic acid-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S07), putting the materials into an N, N-dimethylacetamide solvent together, and carrying out ultrasonic dispersion, stirring and defoaming to obtain a homogeneous casting film solution;
(S09) casting the homogeneous casting solution in the step (S08) by a preparation device to form the membrane, thus obtaining the low-surface-energy anti-pollution hollow fiber membrane. The invention forms good combination with polyvinylidene fluoride (PVDF) through a polymerized carbon chain of a hydrophobic end, so that the two are fixed and are not easy to fall off, a hydration layer is formed on the surface of the membrane through hydrogen bond and ionization effect at the hydrophilic end, the capability of shielding pollutants is enhanced, a low surface energy interface is established in space, the adhesion force of the pollutants is reduced, the removal of the pollutants from the surface of the membrane is accelerated, the irreversible pollution on the surface of the membrane is prevented, and the use efficiency of the membrane is improved; according to the invention, through the introduction of hydrophilic groups, a part of polyacryl piperazine fragments of the polymer enhance the hydrophilic performance of the surface of the membrane wire, and the pure water flux of the membrane material is improved; after the amphiphilic polymer is modified, the low surface property of the membrane yarn is reserved, the membrane yarn has better anti-pollution property, and the interception property of Bovine Serum Albumin (BSA) is effectively improved.
Preferably, in the step (S01), the mass ratio of the trichlorosilane to the 1, 4-diacrylylpiperazine is 1 to 1.5:1. More preferably, in the step (S01), the mass ratio of the trichlorosilane to the 1, 4-diacrylylpiperazine is 1.2 to 1.4:1. More preferably, the mass ratio of the trichlorosilane to the 1, 4-diacrylylpiperazine in the step (S01) is 1.3:1. Wherein the mass ratio of the trichlorosilane to the 1, 4-diacrylylpiperazine is limited so that the reaction can be more fully, rapidly and completely carried out.
Preferably, the toluene concentration in the step (S01) is 10% to 30%. More preferably, the toluene concentration in the step (S01) is 15% to 25%. More preferably, the toluene concentration in the step (S01) is 20%. Toluene with a limited concentration can better dissolve trichlorosilane and 1, 4-diacrylyl piperazine quickly, and a stable and good environment is provided for the reaction.
Preferably, the reaction temperature in the step (S02) is 90℃to 120 ℃. More preferably, the reaction temperature in the step (S02) is 95 to 115 ℃. More preferably, the reaction temperature in the step (S02) is 100 to 110 ℃. More preferably, the reaction temperature in the step (S02) is 105 ℃. The reaction temperature is defined here in order to give the catalyst better activity, so that the reaction is faster and more complete.
Preferably, the reaction time in the step (S02) is 4 to 6 hours. More preferably, the reaction time in the step (S02) is 4.5 to 5.5 hours. More preferably, the reaction time in the step (S02) is 4.8 to 5.2 hours. More preferably, the reaction time in the step (S02) is 5h. The reaction time is limited here to ensure sufficient completion of the reaction and to give consideration to timeliness.
Preferably, the catalyst in the step (S02) is nickel. Nickel is selected as a catalyst, so that the silicon-hydrogen bond addition reaction of trichlorosilane and 1, 4-diacryloyl piperazine can be promoted more rapidly, and the reacted 1-acryloyl-4- (3-trichlorosilane) acryloyl piperazine has higher yield.
Preferably, the catalyst is added in the step (S02) in an amount of 20mg/g of the reactant to 50mg/g of the reactant. More preferably, the catalyst is added in the step (S02) in an amount of 25mg/g of the reactant to 45mg/g of the reactant. More preferably, the catalyst is added in the step (S02) in an amount of 30mg/g of the reactant to 40mg/g of the reactant. More preferably, the catalyst is added in the step (S02) in an amount of 35mg/g of the reactant. The addition amount of the catalyst is determined according to the amount of specific reactants, and the limitation of the addition amount of the catalyst can ensure that the reaction is fully completed and the waste caused by excessive catalyst is avoided.
Preferably, the drying in the step (S03) is vacuum drying. The vacuum drying ensures the full drying, avoids the introduction of other impurities and ensures the purity of the dried 1-acryloyl-4- (3-trichlorosilane) acryloyl piperazine.
The drying temperature in the step (S03) is 55-65 ℃. More preferably, the drying temperature in the step (S03) is 58℃to 62 ℃. More preferably, the drying temperature in the step (S03) is 60 ℃. The drying temperature is defined here to prevent the quality of 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine from being affected by excessive temperature while ensuring sufficient drying of 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine.
Preferably, the hydrolysis temperature in the step (S04) is 45 to 55 ℃. More preferably, the hydrolysis temperature in the step (S04) is 48 to 52 ℃. More preferably, the hydrolysis temperature in step (S04) is 50 ℃. The hydrolysis temperature is defined herein in order to allow more rapid and complete hydrolysis of 1-acryloyl-4- (3-trichlorosilane) propenoylpiperazine.
Preferably, the hydrolysis time in the step (S04) is 3 to 5 hours. More preferably, the hydrolysis time in the step (S04) is 3.5 to 4.5 hours. More preferably, the hydrolysis time in the step (S04) is 4 hours. The limitation of the hydrolysis time is to ensure sufficient hydrolysis of 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine and to achieve timeliness.
Preferably, the drying in the step (S05) is vacuum drying. The vacuum drying ensures the full drying, avoids the introduction of other impurities, and ensures the purity of the dried 1-acryloyl-4- (3-trihydroxy silicon-based) acryloyl piperazine monomer.
Preferably, the drying temperature in the step (S05) is 55 to 65 ℃. More preferably, the drying temperature in the step (S05) is 58 to 62 ℃. More preferably, the drying temperature in the step (S05) is 60 ℃. The drying temperature is defined here to prevent the quality of the 1-acryloyl-4- (3-trihydroxysilyl) acryloyl piperazine monomer from being affected by excessive temperature while ensuring sufficient drying of the 1-acryloyl-4- (3-trihydroxysilyl) acryloyl piperazine monomer.
Preferably, the catalyst in the step (S06) is ferrous sulfate. Ferrous sulfate is selected as a catalyst, so that the polymerization reaction of 1-acryloyl-4- (3-trihydroxy silicon-based) acryloyl piperazine monomer can be promoted more rapidly, and the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine after the reaction has higher yield.
Preferably, the catalyst is added in the step (S06) in an amount of 20mg/g to 30mg/g of the reactant. More preferably, the catalyst is added in the step (S06) in an amount of 22mg/g of the reactant to 28mg/g of the reactant. More preferably, the catalyst is added in the step (S06) in an amount of 25mg/g of the reactant. The addition amount of the catalyst is determined according to the amount of specific reactants, and the limitation of the addition amount of the catalyst can ensure that the reaction is fully completed and the waste caused by excessive catalyst is avoided.
Preferably, the initiator in the step (S06) is a mixture of sodium persulfate and sodium sulfite. The mixture of sodium persulfate and sodium sulfite is used as an initiator to better and more quickly enable the polymerization reaction of the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloyl piperazine monomer to start.
In the step (S06), the mass ratio of the sodium persulfate to the sodium sulfite is 1:1. The mass ratio of sodium persulfate to sodium sulfite is limited here to ensure that the initiator formed after mixing has a better reaction initiation effect.
Preferably, the initiator is added in the step (S06) in an amount of 10mg/g to 20mg/g of the reactant. More preferably, the initiator is added in the step (S06) in an amount of 12mg/g to 18mg/g of the reactant. More preferably, the initiator is added in the step (S06) in an amount of 15mg/g of the reactant. The addition amount of the initiator is determined according to the amount of specific reactants, and the limitation of the addition amount of the initiator can ensure that the reaction is fully guided and simultaneously avoid excessive waste.
The reaction temperature in the step (S06) is room temperature. The polymerization reaction can be carried out at room temperature, and the requirements on the reaction conditions are relatively simple.
Preferably, the drying in the step (S07) is vacuum drying. The vacuum drying ensures the full drying, avoids the introduction of other impurities, and ensures the purity of the dried polyacrylic-4- (3-trihydroxy silicon-based) acryloylpiperazine (PAAP).
Preferably, the drying temperature in the step (S07) is 55 to 65 ℃. More preferably, the drying temperature in the step (S07) is 58 to 62 ℃. More preferably, the drying temperature in the step (S07) is 60 ℃. The drying temperature is defined here to prevent the quality of the polyacrylic acid-4- (3-trihydroxysilyl) acryloylpiperazine (PAAP) from being affected by excessive temperature while ensuring sufficient drying of the polyacrylic acid-4- (3-trihydroxysilyl) acryloylpiperazine (PAAP).
Preferably, in the step (S08), the mass ratio of the polyacrylic acid-4- (3-trihydroxy silicon-based) acryloylpiperazine, polyvinylidene fluoride, polyvinylpyrrolidone and N, N-dimethylacetamide is 1:10-20:3-5:50-60. More preferably, in the step (S08), the mass ratio of the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine, polyvinylidene fluoride, polyvinylpyrrolidone and N, N-dimethylacetamide is 1:12-18:3.5-4.5:52-58. More preferably, in the step (S08), the mass ratio of the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine, polyvinylidene fluoride, polyvinylpyrrolidone and N, N-dimethylacetamide is 1:14-16:3.5-4.5:54-55. More preferably, in the step (S08), the mass ratio of the polyacrylic acid-4- (3-trihydroxy silicon-based) acryloyl piperazine, polyvinylidene fluoride, polyvinylpyrrolidone and N, N-dimethylacetamide is 1:15:4:54.5.N, N dimethylacetamide can well dissolve polyacrylic acid-4- (3-trihydroxy silicon-based) acryloylpiperazine, polyvinylidene fluoride and polyvinylpyrrolidone, and provides a stable reaction environment for subsequent phase inversion blending reaction; after the polyacrylic acyl-4- (3-trihydroxy silicon base) acryloylpiperazine, polyvinylidene fluoride, polyvinylpyrrolidone and N, N-dimethylacetamide are mixed and reacted according to a defined mass ratio, under the promotion effect of an additive polyvinylpyrrolidone, a polymeric carbon chain of a hydrophobic end of the polyacrylic acyl-4- (3-trihydroxy silicon base) acryloylpiperazine can be well combined with the polyvinylidene fluoride, so that the two are not easy to fall off after being fixedly combined, a hydration layer is formed on the surface of the membrane at a hydrophilic end of the hydrophilic end through hydrogen bond and ionization effect, the capability of shielding pollutants is enhanced, a low surface energy interface is established in space, the adhesion force of the pollutants is reduced, the removal of the pollutants from the surface of the membrane is accelerated, the irreversible pollution on the surface of the membrane is prevented, and the use efficiency of the membrane is improved.
Preferably, the ultrasonic time in the step (S08) is 35 to 60 minutes. More preferably, the ultrasonic time in the step (S08) is 40min to 55min. More preferably, the ultrasonic time in the step (S08) is 45 to 50 minutes. More preferably, the ultrasonic time in the step (S08) is 48 minutes. The limitation of the ultrasonic time is to ensure the complete phase inversion mixing reaction of each substance and simultaneously consider timeliness.
Preferably, the ultrasonic temperature in the step (S08) is 45-55 ℃. More preferably, the ultrasonic temperature in the step (S08) is 48-52 ℃. More preferably, the ultrasound temperature in the step (S08) is 50 ℃. The ultrasonic temperature is defined herein to ensure that the phase inversion mixing reaction between substances is in good temperature condition during the ultrasonic process, so that the reaction is more complete.
Preferably, the defoaming time in the step (S08) is 3 to 5 hours. More preferably, the defoaming time in the step (S08) is 3.5 to 4.5 hours. More preferably, the defoaming time in the step (S08) is 4 hours. The limitation of the defoaming time is to ensure the complete defoaming of the homogeneous casting solution and also to consider the timeliness.
Preferably, the defoaming temperature in the step (S08) is 45 to 55 ℃. More preferably, the defoaming temperature in the step (S08) is 48 to 52 ℃. More preferably, the defoaming temperature in the step (S08) is 50 ℃. The deaeration temperature is limited here in order to make the deaeration process more complete and to ensure the quality of the final homogeneous casting solution.
Preferably, the core liquid is a mixed liquid of N, N dimethylacetamide and water. The mixed liquid of N, N dimethylacetamide and water is used as core liquid, and the core liquid can be well matched with a preparation device for casting film forming, so that the quality of the finally prepared hollow fiber film is ensured.
Preferably, the concentration of the core liquid is 30% to 50%. More preferably, the concentration of the core liquid is 35% -45%. Preferably, the concentration of the core liquid is 40%. The concentration of the core liquid is limited, and the casting film can be better matched with a preparation device for molding.
Preferably, the defoaming in the step (S08) is vacuum defoaming or static defoaming. The defoaming mode can be flexibly selected according to the needs, and the defoaming process can be more thoroughly realized.
The third technical scheme of the invention: the low surface energy anti-pollution hollow fiber membrane comprises the following components in parts by weight,
30-70 parts of 1, 4-diacryloyl piperazine, 40-80 parts of trichlorosilane, 30-70 parts of polyvinylidene fluoride and 10-35 parts of polypyrrolidone. The invention selects proper amount of 1, 4-diacryloyl piperazine, trichlorosilane, polyvinylidene fluoride and polypyrrolidone to interact together to prepare the hollow fiber membrane, the prepared hollow fiber membrane enhances the hydrophilic property of the surface of membrane wires, improves the pure water flux of membrane materials, retains the low surface property of the membrane wires, has better anti-pollution property, and realizes the effective improvement of the interception property of Bovine Serum Albumin (BSA).
Preferably, the composition comprises the following components in parts by weight,
35-65 parts of 1, 4-diacryloyl piperazine, 45-75 parts of trichlorosilane, 35-65 parts of polyvinylidene fluoride and 15-30 parts of polypyrrolidone.
Preferably, the composition comprises the following components in parts by weight,
40-60 parts of 1, 4-diacryloyl piperazine, 50-70 parts of trichlorosilane, 40-60 parts of polyvinylidene fluoride and 20-25 parts of polypyrrolidone.
Preferably, the composition comprises the following components in parts by weight,
45-55 parts of 1, 4-diacryloyl piperazine, 55-65 parts of trichlorosilane, 45-55 parts of polyvinylidene fluoride and 22-24 parts of polypyrrolidone.
Preferably, the composition comprises the following components in parts by weight,
50 parts of 1, 4-diacryloyl piperazine, 60 parts of trichlorosilane, 50 parts of polyvinylidene fluoride and 23 parts of polypyrrolidone.
The invention has the following beneficial effects:
(1) The raw materials are added into a mixing barrel, and the rotating roller is driven to rotate by a power mechanism, so that the mixing device is driven to rotate and is heated by a heater; the stirring plate in rotation mixes the raw materials, part of the raw materials pass through the mixing port, and the fin can rotate together with the stirring plate;
(2) When the pressure device is driven by the stirring plate to rotate, the scraping blade also rotates along with the stirring plate, interaction between the pressure device and the auxiliary device is utilized, the hanging material on the inner surface of the mixing barrel can be further removed, further mixing of raw materials is facilitated, mixing quality is high, the cooling device can be enabled to cool in time when the rotating roller is combined, further preparation of the membrane material by the follow-up membrane making device is facilitated, rotation of the scraping blade is fully utilized, and the structure is connected.
Drawings
FIG. 1 is a technical roadmap of the invention;
FIG. 2 is a schematic diagram showing the overall structure of the manufacturing apparatus of the present invention;
FIG. 3 is a first schematic cross-sectional view of a manufacturing apparatus of the present invention;
FIG. 4 is a schematic cross-sectional view of a mixing device according to the present invention;
FIG. 5 is a schematic diagram of the overall structure of the mixing device of the invention;
FIG. 6 is a schematic cross-sectional view of a press apparatus according to the present invention;
FIG. 7 is an enlarged view of a portion of FIG. 6A in accordance with the present invention;
FIG. 8 is a schematic cross-sectional view of an auxiliary device of the present invention;
FIG. 9 is an enlarged view of a portion of the invention at B in FIG. 8;
FIG. 10 is a schematic cross-sectional view of a cooling device of the present invention;
FIG. 11 is a second schematic cross-sectional view of the production apparatus of the present invention;
FIG. 12 is a schematic cross-sectional view of the internal structure of the centrifugal drawing drum of the present invention;
fig. 13 is an enlarged view of a portion of fig. 12 at C in accordance with the present invention.
The marks in the drawings are: 1-a mixing barrel; 2-rotating a roller; 3-a mixing device; 4-auxiliary means; 5-a cooling device; 6-a power mechanism; 7-a film forming device; 8-a material conveying mechanism; 9-a heater; 31-an agitation plate; 32-a mixing port; 33-a compression device; 34-scraping blade; 35-fin; 36-ball pushing piece; 37-deformable collar; 331-a cylinder; 332-support the compression bar; 333-compressed magnetic sphere; 334-elastic support; 335-wobble sub-slices; 41-a circular housing; 42-a guide rail groove; 43-arc surface pressing plates; 44-a vibration device; 441-connecting rods; 442-tension springs; 443-crescent magnetic blocks; 51-a spherical cap; 52-blowing blades; 53-an air inlet; 54-piping; 55-multi-claw air outlet; 71-a box body; 72-a servo motor; 73-centrifuging a wiredrawing cylinder; a 74-gel generator; 75-nozzles; 76-supporting columns; 77-a swing piece; 78-a wire drawing outlet; 79-ox horn puncture needle.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
The preparation device of the low-surface-energy anti-pollution hollow fiber membrane comprises a mixing barrel 1 shown in fig. 8, wherein a rotating roller 2 shown in fig. 4 is rotatably connected to the central position inside the mixing barrel 1, a mixing device 3 is arranged at the bottom of the outer surface of the rotating roller 2, and an auxiliary device 4 is fixedly connected to the position, close to the top, of the inner surface of the mixing barrel 1; the top of the mixing drum 1 is provided with a cooling device 5 as shown in fig. 3; the top of the mixing barrel 1 is fixedly connected with a power mechanism 6; the top end of the rotating roller 2 penetrates through the top of the inner surface of the mixing drum 1 and extends to the outside, and the output end of the power mechanism 6 is connected with the top of the outer surface of the rotating roller 2 through a gear assembly; a film making device 7 is arranged at one end of the cooling device 5 far away from the mixing barrel 1; the bottom of the mixing barrel 1 is provided with a material conveying mechanism 8 shown in fig. 11, the output end of the material conveying mechanism 8 is communicated with a film making device 7, and the bottom of the inner surface of the mixing barrel 1 is provided with a heater 9; the mixing device 3 comprises a stirring plate 31 shown in fig. 5, the edge of the outer surface of the stirring plate 31 is fixedly connected with the bottom of the outer surface of the rotating roller 2, a mixing port 32 is formed in the center of the outer surface of the stirring plate 31, one end of the outer surface of the stirring plate 31, which is far away from the rotating roller 2, is fixedly connected with a compression device 33, and the outer surface of the compression device 33 is fixedly connected with a scraping blade 34; the outer surface of the stirring plate 31 is rotatably connected with a fin 35 as shown in fig. 7 at a position close to the mixing port 32, the outer surface of the fin 35 is fixedly connected with a ball pushing piece 36, the outer surface of the fin 35 is fixedly connected with a deformable retainer ring 37, and one side of the outer surface of the deformable retainer ring 37 away from the fin 35 is fixedly connected with the outer surface of the stirring plate 31. The outer surface of fin 35 sets up to the arc, and fin 35 is provided with two sets of fin 35 opposite directions, and the surface edge of doctor-bar 34 is laminated with the interior surface of compounding bucket 1.
The pressure device 33 comprises a barrel 331 as shown in fig. 6, wherein the outer surface of the barrel 331 is fixedly connected with one end of the outer surface of the stirring plate 31, which is far away from the rotating roller 2, a supporting pressure rod 332 is slidably connected to the top of the barrel 331, a pressure magnetic ball 333 is fixedly connected to the top of the supporting pressure rod 332, an elastic supporting piece 334 is fixedly connected to the bottom of the supporting pressure rod 332, the bottom of the elastic supporting piece 334 is fixedly connected with the bottom of the inner surface of the barrel 331, and a swinging sub-sheet 335 is fixedly connected to the bottom of the outer surface of the supporting pressure rod 332, which is close to the mixing port 32. The top of the cylinder 331 is provided with a sliding hole matched with the outer surface of the supporting compression bar 332, and the outer surface of the cylinder 331 is provided with a sliding groove matched with the bottom of the outer surface of the supporting compression bar 332. The auxiliary device 4 comprises a circular shell 41 as shown in fig. 9, the outer surface of the circular shell 41 is fixedly connected with the outer surface of the mixing drum 1, a guide rail groove 42 is formed in the bottom of the circular shell 41, an arc-surface pressing plate 43 is fixedly connected to the inner surface of the guide rail groove 42, and a vibration device 44 is arranged at the bottom of the inner surface of the circular shell 41. The cambered surface clamp plates 43 are uniformly distributed on the inner surface of the guide rail groove 42, and the vibration devices 44 are uniformly distributed on the bottom of the inner surface of the circular shell 41. The vibration device 44 includes a connecting rod 441, the bottom of the connecting rod 441 is rotationally connected with the bottom of the inner surface of the circular housing 41, the bottom of the outer surface of the connecting rod 441 is fixedly connected with a tension spring 442, the bottom of the tension spring 442 is fixedly connected with the bottom of the inner surface of the circular housing 41, and the top of the connecting rod 441 is fixedly connected with a crescent magnetic block 443.
The cooling device 5 comprises a spherical cover 51 shown in fig. 10, the bottom of the outer surface of the spherical cover 51 is fixedly connected with the top of the mixing drum 1, the top end of the rotating roller 2 extends to the inside of the spherical cover 51, the top end of the rotating roller 2 is fixedly connected with a blowing blade 52, an air inlet 53 is formed in the bottom of the outer surface of the spherical cover 51, a pipeline 54 is fixedly communicated with the top of the spherical cover 51, one end, far away from the spherical cover 51, of the pipeline 54 is communicated with a multi-claw air outlet 55, and the air outlet end of the multi-claw air outlet 55 is fixedly communicated with the top of the film forming device 7.
The film forming device 7 comprises a box 71, one end of the cooling device 5, which is far away from the mixing drum 1, is fixedly communicated with the top of the box 71, a servo motor 72 is fixedly connected to the bottom of the box 71, a centrifugal wire drawing drum 73 is rotatably connected to the inside of the box 71, the bottom end of the centrifugal wire drawing drum 73 is fixedly connected with the output end of the servo motor 72 through a coupler, the output end of the material conveying mechanism 8 is communicated with the top of the centrifugal wire drawing drum 73 through a rotary connector, the top of the box 71 is fixedly connected with a gel generator 74, the inner surface of the box 71 is fixedly connected with a nozzle 75, the output end of the gel generator 74 is communicated with the output end of the nozzle 75, a support column 76 is fixedly connected to the bottom of the inner surface of the centrifugal wire drawing drum 73, a throwing sheet 77 shown in fig. 12 is fixedly connected to the outer surface of the support column 76, a wire drawing outlet 78 is formed in the outer surface of the centrifugal wire drawing drum 73, and the inner surface of the wire drawing outlet 78 is fixedly connected with a ox horn puncture needle 79 shown in fig. 13. The outer surface of the centrifugal wire drawing cylinder 73 is provided in a tapered shape, the outer surface of the centrifugal wire drawing cylinder 73 is gradually increased in diameter from the bottom to the top, and the ox horn puncture needle 79 is provided in an arc shape.
The preparation method of the low surface energy anti-pollution hollow fiber membrane shown in fig. 1 comprises the following steps,
(S01) dissolving proper parts of trichlorosilane and 1, 4-diacrylyl piperazine in toluene; in the step (S01), the mass ratio of the trichlorosilane to the 1, 4-diacrylyl piperazine is 1-1.5:1. The concentration of toluene in the step (S01) is 10% -30%.
(S02) adding a catalyst into the solution in the step (S01), and performing a silicon-hydrogen bond addition reaction to obtain 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine; the reaction temperature in the step (S02) is 90-120 ℃; the reaction time in the step (S02) is 4-6 h. The catalyst in the step (S02) is nickel; the catalyst in the step (S02) is added in an amount of 20mg/g of reactant to 50mg/g of reactant.
(S03) washing and drying the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine obtained in the step (S02); the drying in the step (S03) is vacuum drying, and the drying temperature in the step (S03) is 55-65 ℃.
(S04) dispersing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine dried in the step (S03) in water, and hydrolyzing to obtain 1-acryloyl-4- (3-trihydroxy silicon based) acryloylpiperazine; the hydrolysis temperature in the step (S04) is 45-55 ℃; the hydrolysis time in the step (S04) is 3-5 h.
(S05) washing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S04), and drying for later use; the drying in the step (S05) is vacuum drying, and the drying temperature in the step (S05) is 55-65 ℃.
(S06) dispersing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine dried in the step (S05) in water, adding a catalyst and an initiator under the protection of nitrogen, and reacting to obtain the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine; the catalyst in the step (S06) is ferrous sulfate; the catalyst in the step (S06) is added in an amount of 20mg/g reactant to 30mg/g reactant. The initiator in the step (S06) is a mixture of sodium persulfate and sodium sulfite; in the step (S06), the mass ratio of the sodium persulfate to the sodium sulfite is 1:1. The addition amount of the initiator in the step (S06) is 10mg/g reactant to 20mg/g reactant; the reaction temperature in the step (S06) is room temperature.
(S07) washing the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S06), and drying for later use; the drying in the step (S07) is vacuum drying, and the drying temperature in the step (S07) is 55 ℃ to 65 ℃.
(S08) taking a proper amount of polyvinylidene fluoride (PVDF), polyvinylpyrrolidone (PVP) and the polyacrylic acid-4- (3-trihydroxy silicon-based) acryloylpiperazine (PAAP) in the step (S07), putting the materials into an N, N-Dimethylacetamide (DMAC) solvent together, and carrying out ultrasonic dispersion, stirring and defoaming to obtain a homogeneous casting solution; in the step (S08), the mass ratio of the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine to the polyvinylidene fluoride to the polyvinylpyrrolidone to the N, N-dimethylacetamide is 1:10-20:3-5:50-60. The ultrasonic time in the step (S08) is 35-60 min; the ultrasonic temperature in the step (S08) is 45-55 ℃; the defoaming time in the step (S08) is 3-5 h; the defoaming temperature in the step (S08) is 45-55 ℃. The defoaming in the step (S08) is vacuum defoaming or static defoaming. The core liquid in the preparation process of the hollow fiber membrane is a mixed liquid of N, N-dimethylacetamide and water; the concentration of the core liquid is 30% -50%.
(S09) casting the homogeneous casting solution in the step (S08) by a preparation device to form the membrane, thus obtaining the low-surface-energy anti-pollution hollow fiber membrane.
The low surface energy anti-pollution hollow fiber membrane comprises the following components in parts by weight,
30-70 parts of 1, 4-diacryloyl piperazine, 40-80 parts of trichlorosilane, 30-70 parts of polyvinylidene fluoride and 10-35 parts of polypyrrolidone.
The low surface energy anti-pollution hollow fiber membrane comprises the following components in parts by weight,
40-60 parts of 1, 4-diacryloyl piperazine, 50-70 parts of trichlorosilane, 40-60 parts of polyvinylidene fluoride and 15-30 parts of polypyrrolidone.
Example 1:
the preparation method of the low surface energy anti-pollution hollow fiber membrane shown in fig. 1 comprises the following steps,
(S01) dissolving 60 parts of trichlorosilane and 50 parts of 1, 4-diacrylylpiperazine in 500mL of toluene;
(S02) adding 3 parts of nickel catalyst into the solution in the step (S01), and carrying out silicon-hydrogen bond addition reaction for 5 hours at the temperature of 110 ℃ to obtain 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine;
(S03) washing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine of the step (S02) and drying in vacuum at 55 ℃;
(S04) dispersing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine dried in the step (S03) in water, and hydrolyzing for 3 hours at the temperature of 45 ℃ to prepare the 1-acryloyl-4- (3-trihydroxy silicon based) acryloylpiperazine;
(S05) washing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S04), and then drying in vacuum at 55 ℃ for later use;
(S06) taking 20 parts of the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine dried in the step (S05), dispersing in 200mL of deionized water, adding 0.5 part of ferrous sulfate catalyst and 0.3 part of sodium persulfate-sodium sulfite initiator with the mass ratio of 1:1 under the protection of nitrogen, and reacting at room temperature to obtain the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine;
(S07) washing the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S06), and drying in vacuum at 55 ℃ for standby; the drying in the step (S07) is vacuum drying, and the drying temperature in the step (S07) is 55 ℃ to 65 ℃.
(S08) 5 parts of the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine in the step (S07) is placed in 280mLN and N dimethylacetamide solvents, and is completely dispersed after ultrasonic treatment, so that an amphiphilic copolymer-DMAC system is obtained, 50 parts of polyvinylidene fluoride powder and 25 parts of polyvinylpyrrolidone powder are added to prepare a casting solution, the casting solution is placed in a reaction kettle, vacuum defoamation is carried out, the pressure is selected to be-0.08 Mpa, and the stirring time is 12 hours, and the casting solution is completely dissolved to be light yellow transparent emulsion casting solution; a1.3 mm/0.7mm hollow fiber membrane yarn was prepared at a core liquid concentration of 30%.
The contact angle of the prepared hollow fiber membrane is reduced from 85+/-1.5 degrees to 25+/-1.5 degrees in the contact time of 10 seconds; bovine Serum Albumin (BSA) rejection increased from 78±2.0% to 97±2.0% of the unmodified membrane; the pure water flux is 300 L.m 2 ·h -1 The flux recovery rate is 99.5% and is more than 8 times of that of the unmodified membrane.
Example 2:
the preparation process of low surface energy antipollution hollow fiber membrane includes the following steps,
(S01) dissolving 75 parts of trichlorosilane and 50 parts of 1, 4-diacrylylpiperazine in 500mL of toluene;
(S02) adding 3.5 parts of nickel catalyst into the solution in the step (S01), and carrying out a silicon-hydrogen bond addition reaction for 5 hours at the temperature of 115 ℃ to obtain 1-acryloyl-4- (3-trichlorosilane) acryloyl piperazine;
(S03) washing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine of the step (S02) and drying in vacuum at 65 ℃;
(S04) dispersing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine dried in the step (S03) in water, and hydrolyzing for 5 hours at the temperature of 55 ℃ to prepare the 1-acryloyl-4- (3-trihydroxy silicon based) acryloylpiperazine;
(S05) washing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S04), and then drying in vacuum at 65 ℃ for later use;
(S06) taking 30 parts of the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine dried in the step (S05), dispersing in 300mL of deionized water, adding 1.5 parts of ferrous sulfate catalyst and 0.9 part of sodium persulfate-sodium sulfite initiator with the mass ratio of 1:1 under the protection of nitrogen, and reacting at room temperature to obtain the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloylpiperazine;
(S07) washing the polyacrylic acid-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S06), and drying in vacuum at 65 ℃ for later use;
(S08) 4 parts of the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine in the step (S07) are placed in 220mLN, N dimethylacetamide solvent, and are completely dispersed after ultrasonic treatment, so that an amphiphilic copolymer-DMAC system is obtained, 50 parts of polyvinylidene fluoride powder and 15 parts of polyvinylpyrrolidone powder are added to prepare a casting solution, the casting solution is placed in a reaction kettle, vacuum defoamation is carried out, the pressure is selected to be-0.08 Mpa, and the stirring time is 12 hours, and the casting solution is completely dissolved to be light yellow transparent emulsion casting solution; a1.3 mm/0.7mm hollow fiber membrane yarn was prepared at a core liquid concentration of 30%.
The contact angle of the prepared hollow fiber membrane is reduced from 85+/-1.5 degrees to 32+/-1.5 degrees in the contact time of 10 seconds; bovine Serum Albumin (BSA) rejection increased from 78±2.0% to 96±2.0% of the unmodified membrane; the pure water flux is 280 L.m 2 ·h -1 The flux recovery rate is 99.2% and is more than 8 times of that of the unmodified membrane.
Example 3:
the preparation process of low surface energy antipollution hollow fiber membrane includes the following steps,
(S01) 45 parts of trichlorosilane and 30 parts of 1, 4-diacrylyl piperazine are dissolved in 300mL of toluene;
(S02) adding 2 parts of nickel catalyst into the solution in the step (S01), and carrying out silicon-hydrogen bond addition reaction for 5 hours at the temperature of 100 ℃ to prepare 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine;
(S03) washing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine of the step (S02) and drying in vacuum at 60 ℃;
(S04) dispersing the 1-acryloyl-4- (3-trichlorosilane) acryloylpiperazine dried in the step (S03) in water, and hydrolyzing for 4 hours at the temperature of 50 ℃ to prepare the 1-acryloyl-4- (3-trihydroxy silicon based) acryloylpiperazine;
(S05) washing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S04), and then drying in vacuum at 60 ℃ for later use;
(S06) 15 parts of the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloyl piperazine dried in the step (S05) are taken and dispersed in 150mL of deionized water, and 0.4 part of ferrous sulfate catalyst and 0.25 part of sodium persulfate-sodium sulfite initiator with the mass ratio of 1:1 are added under the protection of nitrogen, and the mixture is reacted at room temperature to prepare the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine;
(S07) washing the polyacrylic acid-4- (3-trihydroxy silicon-based) acryloylpiperazine in the step (S06), and drying in vacuum at 60 ℃ for later use;
(S08) taking 3.5 parts of the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine in the step (S07), putting the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine in 200mLN and N dimethylacetamide solvents, completely dispersing the polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine after ultrasonic treatment to obtain an amphiphilic copolymer-DMAC system, adding 40 parts of polyvinylidene fluoride powder and 10 parts of polyvinylpyrrolidone powder to prepare a casting solution, putting the casting solution into a reaction kettle, vacuum defoaming, selecting the pressure of-0.08 Mpa, and stirring for 12 hours until the casting solution is completely dissolved to form a light yellow transparent emulsion casting solution; a1.3 mm/0.7mm hollow fiber membrane yarn was prepared at a core liquid concentration of 30%.
The contact angle of the prepared hollow fiber membrane is reduced from 85+/-1.5 degrees to 39+/-1.5 degrees in the contact time of 10 seconds; bovine Serum Albumin (BSA) rejection increased from 78±2.0% of unmodified membrane to 92±2.0%; the pure water flux is 220 L.m 2 ·h -1 The flux recovery rate is 98.3% compared with 7 times of the unmodified membrane.
The preparation method of the low surface energy anti-pollution hollow fiber membrane comprises the following steps: 1, 4-diacryloyl piperazine and trichlorosilane are used as precursors, an amphiphilic polymer namely polyacrylic acyl-4- (3-trihydroxy silicon-based) acryloyl piperazine (PAAP) is obtained through the reactions of silicon-hydrogen bond addition, hydrolysis, polymerization and the like, and the amphiphilic polymer is used as a modifier to be mixed with a membrane material to form an amphiphilic hollow fiber membrane material;
synthesis of the monomer: dissolving trichlorosilane and 1, 4-diacryloyl piperazine in toluene, adding a catalyst, synthesizing 1-acryloyl-4- (3-trichlorosilane) acryloyl piperazine through a silicon-hydrogen bond addition reaction at a certain temperature and time, washing, drying, dispersing the 1-acryloyl-4- (3-trihydroxy silicon-based) acryloyl piperazine in water, hydrolyzing to obtain 1-acryloyl-4- (3-trihydroxy silicon-based) acryloyl piperazine, cleaning to remove impurities, and drying for later use;
synthesis conditions of monomer 1-acryloyl-4- (3-trihydroxy silicon-based) acryloylpiperazine: the mass ratio of the 1, 4-diacryloyl piperazine to the trichlorosilane is 1:1-1.5, the concentration is 10% -30%, the temperature is 90 ℃ -120 ℃, the reaction time is 5h, the catalyst is nickel, and the adding amount of the catalyst is 20mg/g reactant to 50mg/g reactant.
Synthesis of amphiphilic polymers: dispersing the prepared 1-acryloyl-4- (3-trihydroxy silicon-based) acryloyl piperazine in deionized water, adding a catalyst and an initiator in a nitrogen atmosphere, reacting to obtain an amphiphilic polymer, namely, polyacrylic acid-4- (3-trihydroxy silicon-based) acryloyl piperazine (PAAP), washing, and drying for later use;
the catalyst added in the synthesis of the amphiphilic polymer is ferrous sulfate, the addition amount is 20mg/g reactant to 30mg/g reactant, the initiator is sodium persulfate-sodium sulfite (mass ratio 1:1), the addition amount is 10 to 20mg/g reactant, and the temperature is room temperature.
Preparing a modified film by a phase inversion method: and (3) putting a certain amount of amphiphilic polymer modifier (PAAP), a certain amount of polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP) into a DMAC (N, N-dimethylacetamide) solvent in a blending mode, completely dispersing after ultrasonic treatment, and stirring and defoaming to form a homogeneous casting solution. The core liquid is a mixed liquid of DMAC and water, and after the membrane is molded by a preparation device, the hollow fiber membrane modified by the amphiphilic copolymer is obtained;
PAAP, PVDF, PVP and DMAC in the mass ratio of 1:10-20:3-5:50-60, and the feed liquid reaction kettle is defoamed in vacuum or is kept stand for defoamation. The membrane core liquid is a mixed liquid of DMAC and water, and the concentration is 30% -50%.
Example 4:
the preparation device of the low-surface-energy anti-pollution hollow fiber membrane comprises a mixing barrel 1, wherein a rotating roller 2 is rotationally connected to the central position inside the mixing barrel 1, a mixing device 3 is arranged at the bottom of the outer surface of the rotating roller 2, the inner surface of the mixing barrel 1 is fixedly connected with an auxiliary device 4 near the top, a cooling device 5 is arranged at the top of the mixing barrel 1, a power mechanism 6 is fixedly connected to the top of the mixing barrel 1, the top of the rotating roller 2 penetrates through the top of the inner surface of the mixing barrel 1 and extends to the outside, the output end of the power mechanism 6 is connected with the top of the outer surface of the rotating roller 2 through a gear assembly, a membrane making device 7 is arranged at one end of the cooling device 5 away from the mixing barrel 1, a material conveying mechanism 8 is arranged at the bottom of the mixing barrel 1, the output end of the material conveying mechanism 8 is communicated with the membrane making device 7, and a heater 9 is arranged at the bottom of the inner surface of the mixing barrel 1; the mixing device 3 comprises a stirring plate 31, the edge of the outer surface of the stirring plate 31 is fixedly connected with the bottom of the outer surface of the rotating roller 2, a mixing opening 32 is formed in the central position of the outer surface of the stirring plate 31, one end of the stirring plate 31, which is far away from the rotating roller 2, is fixedly connected with a compression device 33, the outer surface of the compression device 33 is fixedly connected with a scraping blade 34, the outer surface of the stirring plate 31, which is close to the mixing opening 32, is rotationally connected with a fin 35, the outer surface of the fin 35 is fixedly connected with a ball pushing piece 36, the outer surface of the fin 35 is fixedly connected with a deformable retainer ring 37, and one side, which is far away from the fin 35, of the outer surface of the deformable retainer ring 37 is fixedly connected with the outer surface of the stirring plate 31. The outer surface of fin 35 sets up to the arc, and fin 35 is provided with two sets of, and two sets of fin 35 opposite directions, and the surface edge of doctor-bar 34 is laminated with the interior surface of compounding bucket 1.
The raw materials are added into the mixing barrel 1, and the rotating roller 2 is driven to rotate through the power mechanism 6, so that the mixing device 3 is driven to rotate, and under the heating of the heater 9, the stirring plate 31 in rotation mixes the raw materials, part of raw materials pass through the mixing port 32, the fins 35 also rotate along with the stirring plate 31, the outer surfaces of the fins 35 are combined to form an arc shape, the fins 35 are provided with two groups, the two groups of fins 35 are opposite in direction, the groups of fins 35 rotate together, the mixing of the raw materials is further promoted, meanwhile, when the compression device 33 is driven to rotate by the stirring plate 31, the scraping blade 34 rotates along with the outer surface edge of the scraping blade 34 is combined with the inner surface of the mixing barrel 1, at the moment, the scraping blade 34 scrapes off residual scraping materials on the inner surface of the mixing barrel 1, and the inner surface of the mixing barrel 1 can be further cleaned by interaction between the compression device 33 and the auxiliary device 4, the mixing of the raw materials is further facilitated, the mixing quality is high, and when the rotating roller 2 rotates, the cooling device 5 is further facilitated to cool the cooling device 7, and the film preparation device is fully connected with the film preparation device.
The film forming device 7 comprises a box body 71, one end of the cooling device 5, which is far away from the mixing drum 1, is fixedly and communicated with the top of the box body 71, a servo motor 72 is fixedly connected to the bottom of the box body 71, a centrifugal wire drawing drum 73 is rotatably connected to the inside of the box body 71, the bottom end of the centrifugal wire drawing drum 73 is fixedly connected with the output end of the servo motor 72 through a coupler, the output end of the material conveying mechanism 8 is communicated with the top of the centrifugal wire drawing drum 73 through a rotary connector, a gel generator 74 is fixedly connected to the top of the box body 71, a nozzle 75 is fixedly connected to the inner surface of the box body 71, the output end of the gel generator 74 is communicated with the output end of the nozzle 75, a supporting column 76 is fixedly connected to the bottom of the inner surface of the centrifugal wire drawing drum 73, a throwing sheet 77 is fixedly connected to the outer surface of the supporting column 76, a wire drawing outlet 78 is formed in the outer surface of the centrifugal wire drawing drum 73, and a ox horn puncture needle 79 is fixedly connected to the inner surface of the wire drawing outlet 78. The outer surface of the centrifugal wire drawing cylinder 73 is provided in a tapered shape, the outer surface of the centrifugal wire drawing cylinder 73 is gradually increased in diameter from the bottom to the top, and the ox horn puncture needle 79 is provided in an arc shape. When the material conveying mechanism 8 conveys the mixed raw materials into the centrifugal drawing cylinder 73 in the box 71, the centrifugal drawing cylinder 73 is driven to rotate rapidly through the servo motor 72, so that the raw materials in the centrifugal drawing cylinder 73 are subjected to centrifugal force and thrown out from holes on the outer surface of the centrifugal drawing cylinder 73, and are further stretched into filaments, membrane filaments are wound together to form a membrane, the cooling device 5 cools in time, and meanwhile, gel inside the cooling device is sprayed out from the nozzle 75 by utilizing the gel generator 74, the gel is attached to the membrane filaments, and the fluidity of the surface of the membrane is reduced, so that the hollow fiber membrane is formed. Along with the raw materials is carried in the centrifugal wire drawing section of thick bamboo 73 through feeding mechanism 8, the centrifugal wire drawing section of thick bamboo 73 that rotates this moment drives the support column 76 and rotates for throw the piece 77 along with rotating together, throw the piece 77 and evenly throw away the raw materials that falls to centrifugal wire drawing section of thick bamboo 73's internal surface this moment, and make the raw materials by throwing away from wire drawing export 78 when, puncture the raw materials through ox horn pjncture needle 79, not only can make the raw materials wire drawing even, can also reduce the stress area, the difficult circumstances that appears the raw materials jam, be convenient for the preparation to the fibrous membrane.
The pressure device 33 comprises a barrel 331, the outer surface of the barrel 331 is fixedly connected with the outer surface of the stirring plate 31 and far away from one end of the rotating roller 2, the top of the barrel 331 is slidably connected with a supporting pressure rod 332, the top of the supporting pressure rod 332 is fixedly connected with a pressure magnetic ball 333, the bottom of the supporting pressure rod 332 is fixedly connected with an elastic supporting piece 334, the bottom of the elastic supporting piece 334 is fixedly connected with the bottom of the inner surface of the barrel 331, and the bottom of the outer surface of the supporting pressure rod 332 is fixedly connected with a swinging sub-sheet 335 close to the mixing port 32. The top of the cylinder 331 is provided with a sliding hole matched with the outer surface of the supporting compression bar 332, and the outer surface of the cylinder 331 is provided with a sliding groove matched with the bottom of the outer surface of the supporting compression bar 332. After the pressure device 33 is driven by the stirring plate 31 to rotate, the pressure magnetic ball 333 is utilized to rotate under the limit of the guide rail groove 42, the rotation is more stable, the rotating pressure magnetic ball 333 is utilized to contact with the cambered surface pressing plate 43, the pressure magnetic ball 333 is subjected to pressing force under continuous rotation, the supporting pressure rod 332 is combined with the top of the barrel 331, the supporting pressure rod 332 can drive the swinging sub-plate 335 to move downwards, the elastic supporting piece 334 is compressed, when the rotating pressure magnetic ball 333 is separated from the cambered surface pressing plate 43, and under the elastic force of the elastic supporting piece 334, the supporting pressure rod 332 drives the swinging sub-plate 335 and the pressure magnetic ball 333 to move upwards for resetting, the swinging sub-plate 335 is further enabled to move upwards and downwards, the continuous rotation is combined, raw materials are stirred in multiple directions, the raw materials are enabled to be fast and uniform, the upper and lower movement of the swinging sub-plate 335 is facilitated, the outer surface of the swinging sub-plate 335 is utilized to contact with the end of the pushing piece 36, the outer surface edge of the swinging sub-plate 335 is combined with the end of the stirring plate 31, the outer surface edge of the swinging sub-plate 35 is in rotary connection with the outer surface of the stirring plate 31, the swinging sub-plate 35 is enabled to be capable of being compressed, the reciprocating plate 35 is enabled to be deformed, and the reciprocating plate 35 is enabled to rotate, the reciprocating plate 35 is enabled to be deformed, and the reciprocating plate 35 is deformed, and the reciprocating plate is deformed.
Example 5:
the auxiliary device 4 comprises a circular shell 41, the outer surface of the circular shell 41 is fixedly connected with the outer surface of the mixing drum 1, a guide rail groove 42 is formed in the bottom of the circular shell 41, an arc-surface pressing plate 43 is fixedly connected with the inner surface of the guide rail groove 42, and a vibrating device 44 is arranged at the bottom of the inner surface of the circular shell 41. The cambered surface clamp plates 43 are uniformly distributed on the inner surface of the guide rail groove 42, and the vibration devices 44 are uniformly distributed on the bottom of the inner surface of the circular shell 41. The vibration device 44 includes a connecting rod 441, the bottom of the connecting rod 441 is rotationally connected with the bottom of the inner surface of the circular housing 41, the bottom of the outer surface of the connecting rod 441 is fixedly connected with a tension spring 442, the bottom of the tension spring 442 is fixedly connected with the bottom of the inner surface of the circular housing 41, and the top of the connecting rod 441 is fixedly connected with a crescent magnetic block 443. When the pressed magnetic ball 333 rotates, the cambered surface pressing plate 43 presses the pressed magnetic ball 333 in time, and drives the pressed magnetic ball 333 to move upwards and reset by the supporting pressing rod 332, and the pressed magnetic ball 333 and the crescent magnetic block 443 are set to be homonymous magnetic poles, so that repulsive magnetic force is generated when the pressed magnetic ball 333 and the crescent magnetic block 443 meet, at the moment, the crescent magnetic block 443 is pushed by reverse magnetic force, and the bottom end of the connecting rod 441 is combined with the bottom of the inner surface of the circular shell 41 to rotate and connect, so that the crescent magnetic block 443 is pushed and lifted by magnetic force, the tension spring 442 is stretched, and along with the continuous movement of the pressed magnetic ball 333, the repulsive magnetic force disappears after the pressed magnetic ball 333 is far away from the crescent magnetic block 443, and under the elastic tension of the tension spring 442, the crescent magnetic block 443 is knocked to the bottom of the inner surface of the circular shell 41, so that the circular shell 41 vibrates, and the vibration is transferred to the mixing barrel 1, and the raw materials are further reduced to be attached to the inner surface of the mixing barrel 1.
Example 6:
the cooling device 5 comprises a spherical cover 51, the bottom of the outer surface of the spherical cover 51 is fixedly connected with the top of the mixing drum 1, the top end of the rotating roller 2 extends to the inside of the spherical cover 51, the top end of the rotating roller 2 is fixedly connected with a blowing blade 52, an air inlet 53 is formed in the bottom of the outer surface of the spherical cover 51, the top of the spherical cover 51 is fixedly communicated with a pipeline 54, one end, far away from the spherical cover 51, of the pipeline 54 is communicated with a multi-claw air outlet 55, and the air outlet end of the multi-claw air outlet 55 is fixedly communicated with the top of the film making device 7. The bottom of the spherical cover 51 is provided with perforations through which the top ends of the rotating rollers 2 pass, and the air inlets 53 are uniformly distributed at the bottom of the outer surface of the spherical cover 51. When the rotating roller 2 rotates, the mixing device 3 can be driven to rotate, the stirring plate 31 is promoted to mix far away, the blowing blades 52 can be driven to rotate, the rotating blowing blades 52 blow air inside the spherical cover 51, negative pressure is formed inside the spherical cover 51, at the moment, external air enters the spherical cover 51 from the air inlet 53, at the moment, air flows can be blown into the film forming device 7 from the multi-claw air outlet 55 under the conveying of the pipeline 54, and then the film forming device is cooled in time, skillfully utilizes the rotation of the blowing blades, and links the structures together.
When in use, raw materials are added into the mixing barrel 1, the rotating roller 2 is driven to rotate by the power mechanism 6, so that the mixing device 3 is driven to rotate, and under the heating of the heater 9, the raw materials are mixed by the stirring plate 31 in rotation, and part of raw materials pass through the mixing port 32, so that the mixing of the raw materials is promoted, meanwhile, when the stirring plate 31 is driven to rotate by the pressure device 33, the scraping blade 34 rotates together, the outer surface edge of the scraping blade 34 is combined with the inner surface of the mixing barrel 1, the scraping blade 34 scrapes the residual scraping material on the inner surface of the mixing barrel 1, and when the pressure device 33 is driven to rotate by the stirring plate 31, the pressure magnetic ball 333 is utilized under the limit of the guide rail groove 42, so that the rotation is more stable, the pressure magnetic ball 333 contacts with the cambered surface pressing plate 43, and under the continuous rotation, the pressure magnetic ball 333 is pressed, the supporting press rod 332 is combined with the top of the cylinder 331 to be in sliding connection, so that the supporting press rod 332 drives the swinging sub-sheet 335 to move downwards, the elastic supporting piece 334 is compressed, when the rotating pressed magnetic ball 333 and the crescent magnetic block 443 are separated, under the elastic force of the elastic supporting piece 334, the supporting press rod 332 drives the swinging sub-sheet 335 and the pressed magnetic ball 333 to move upwards and reset, further the swinging sub-sheet 335 moves up and down in a reciprocating manner, the raw materials are stirred in multiple directions, when the pressed magnetic ball 333 rotates, the cambered surface pressing plate 43 can timely press the pressed magnetic ball 333, and when the pressed magnetic ball 333 is driven to move upwards and reset by the supporting press rod 332, the pressed magnetic ball 333 and the crescent magnetic block 443 are set to be identical magnetic poles, repulsive magnetic force is generated when the pressed magnetic ball 333 and the crescent magnetic block 443 meet, at the moment, the crescent magnetic block 443 is pushed by reverse magnetic force, the bottom of the connecting rod 441 is combined with the bottom of the inner surface of the circular shell 41 to rotate and connect, the crescent magnetic block 443 is pushed and lifted by magnetic force, the tension spring 442 is stretched, and along with the continuous movement of the compressed magnetic ball 333, the compressed magnetic ball 333 is far away from the crescent magnetic block 443, the repulsive magnetic force disappears, and under the elastic tension of the tension spring 442, the crescent magnetic block 443 is knocked to the bottom of the inner surface of the circular shell 41, the circular shell 41 vibrates, and the vibration is transferred to the mixing drum 1, and further, the raw materials are reduced to be attached to the inner surface of the mixing drum 1, and when the rotating roller 2 rotates, the blowing blade 52 is driven to rotate, the blowing blade 52 in rotation blows the gas inside the spherical cover 51, so that the spherical cover 51 forms negative pressure inside, at this moment, the external gas enters into the spherical cover 51 from the air inlet 53, at this moment, the air current is blown into the film forming device 7 from the multi-claw air outlet 55, and then is cooled in time, when the material conveying mechanism 8 conveys the mixed raw materials into the box 71, vibration is transferred to the mixing drum 1, and the vibration is further reduced, and the raw materials are blown out of the film-shaped fiber tube 73 from the spinning drum 73 by the spinning nozzle 73, and the film-shaped spinning tube 73 is cooled, and the film-shaped spinning device is further cooled, and the film-shaped fiber is further cooled, the film-shaped spinning device is cooled, and the film-shaped spinning device is further, the film-shaped fiber spinning device is cooled, and the film-shaped spinning device is further, and the film-shaped fiber spinning device is cooled, and the film-shaped, and the film is cooled.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution and the modified concept thereof, within the scope of the present invention.
Claims (10)
1. The preparation device of the low surface energy anti-pollution hollow fiber membrane is characterized in that: the mixing device comprises a mixing barrel (1), wherein a rotating roller (2) is rotatably connected to the central position inside the mixing barrel, a mixing device (3) is arranged at the bottom of the outer surface of the rotating roller, and an auxiliary device (4) is fixedly connected to the position, close to the top, of the inner surface of the mixing barrel; a cooling device (5) is arranged at the top of the mixing barrel; the top of the mixing barrel is fixedly connected with a power mechanism (6); the top end of the rotating roller penetrates through the top of the inner surface of the mixing barrel and extends to the outside, and the output end of the power mechanism is connected with the top of the outer surface of the rotating roller through a gear assembly; one end of the cooling device, which is far away from the mixing barrel, is provided with a film making device (7); the bottom of the mixing barrel is provided with a material conveying mechanism (8), the output end of the material conveying mechanism is communicated with the film making device, and the bottom of the inner surface of the mixing barrel is provided with a heater (9);
The mixing device comprises a stirring plate (31), the edge of the outer surface of the stirring plate is fixedly connected with the bottom of the outer surface of the rotating roller, a mixing port (32) is formed in the center of the outer surface of the stirring plate, one end, far away from the rotating roller, of the outer surface of the stirring plate is fixedly connected with a compression device (33), and the outer surface of the compression device is fixedly connected with a scraping blade (34); the stirring device is characterized in that a fin (35) is rotationally connected to the outer surface of the stirring plate close to the mixing port, a ball pushing piece (36) is fixedly connected to the outer surface of the fin, a deformable retainer ring (37) is fixedly connected to the outer surface of the fin, and one side, away from the fin, of the outer surface of the deformable retainer ring is fixedly connected with the outer surface of the stirring plate.
2. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 1, characterized in that: the surface of fin sets up to the arc, the fin is provided with two sets of fin opposite directions, the surface edge of doctor-bar is laminated with the interior surface of compounding bucket.
3. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 2, characterized in that: the compression device comprises a barrel (331), one end fixed connection that the rotor roller was kept away from to the surface of barrel and the surface of stirring board, the top sliding connection of barrel has support depression bar (332), the top fixedly connected with of support depression bar is pressed magnetic ball (333), the bottom fixedly connected with elastic support piece (334) of support depression bar, elastic support piece's bottom and the interior surface bottom fixed connection of barrel, the surface bottom of support depression bar is close to the position fixedly connected with swing subplate (335) of compounding mouth.
4. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 3, wherein: the top of the cylinder body is provided with a sliding hole matched with the outer surface of the supporting compression bar, and the outer surface of the cylinder body is provided with a sliding groove matched with the bottom of the outer surface of the supporting compression bar.
5. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 1, characterized in that: the auxiliary device comprises a circular shell (41), the outer surface of the circular shell is fixedly connected with the outer surface of the mixing barrel, a guide rail groove (42) is formed in the bottom of the circular shell, an arc-surface pressing plate (43) is fixedly connected with the inner surface of the guide rail groove, and a vibrating device (44) is arranged at the bottom of the inner surface of the circular shell.
6. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 5, wherein: the cambered surface clamp plates are evenly distributed on the inner surface of the guide rail groove, and the vibrating devices are evenly distributed on the bottom of the inner surface of the circular shell.
7. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 5, wherein: the vibrating device comprises a connecting rod (441), the bottom of the connecting rod is rotationally connected with the bottom of the inner surface of the circular shell, a tension spring (442) is fixedly connected to the bottom of the outer surface of the connecting rod, the bottom of the tension spring is fixedly connected with the bottom of the inner surface of the circular shell, and a crescent magnetic block (443) is fixedly connected to the top of the connecting rod.
8. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 1, characterized in that: the cooling device comprises a spherical cover (51), the bottom of the outer surface of the spherical cover is fixedly connected with the top of the mixing drum, the top end of the rotating roller extends to the inside of the spherical cover, the top end of the rotating roller is fixedly connected with a blowing blade (52), an air inlet hole (53) is formed in the bottom of the outer surface of the spherical cover, a pipeline (54) is fixedly communicated with the top of the spherical cover, one end, far away from the spherical cover, of the pipeline is communicated with a multi-claw air outlet (55), and the air outlet end of the multi-claw air outlet is fixedly communicated with the top of the film making device.
9. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 1, characterized in that: the film forming device comprises a box body (71), one end of a cooling device, which is far away from a mixing drum, is fixedly communicated with the top of the box body, a servo motor (72) is fixedly connected to the bottom of the box body, a centrifugal wire drawing drum (73) is rotationally connected to the inside of the box body, the bottom end of the centrifugal wire drawing drum is fixedly connected with the output end of the servo motor through a coupler, the output end of a feeding mechanism is communicated with the top of the centrifugal wire drawing drum through a rotating connector, a gel generator (74) is fixedly connected to the top of the box body, a nozzle (75) is fixedly connected to the inner surface of the box body, the output end of the gel generator is communicated with the output end of the nozzle, a support column (76) is fixedly connected to the bottom of the inner surface of the centrifugal wire drawing drum, a throwing piece (77) is fixedly connected to the outer surface of the support column, a wire drawing outlet (78) is formed in the outer surface of the centrifugal wire drawing drum, and a ox horn puncture needle (79) is fixedly connected to the inner surface of the wire drawing outlet.
10. The apparatus for producing a low surface energy anti-fouling hollow fiber membrane according to claim 9, characterized in that: the outer surface of the centrifugal wire drawing cylinder is arranged to be conical, the diameter of the outer surface of the centrifugal wire drawing cylinder is gradually increased from bottom to top, and the ox horn puncture needle is arranged to be arc-shaped.
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| CN202311260852.XA CN117085515A (en) | 2023-01-15 | 2023-01-15 | Preparation device of low-surface-energy anti-pollution hollow fiber membrane |
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| CN101058058B (en) * | 2007-05-23 | 2010-08-11 | 中国科学院上海有机化学研究所 | Surface fixed taurine ligand porous membrane material, preparation method and its application in blood fat adsorption separation |
| CN101264428B (en) * | 2008-04-25 | 2010-10-13 | 浙江大学 | Method for modifying polyvinylidene fluoride ultrafiltration membrane by amphiphilic co-polymer |
| DE102008041477A1 (en) * | 2008-08-22 | 2010-02-25 | Wacker Chemie Ag | Porous membranes of organopolysiloxane copolymers |
| JP5446648B2 (en) * | 2008-10-07 | 2014-03-19 | 信越化学工業株式会社 | Pattern formation method |
| GB201112389D0 (en) * | 2011-07-19 | 2011-08-31 | Fujifilm Mfg Europe Bv | Curable compositions and membranes |
| CN102974232B (en) * | 2012-11-26 | 2015-06-17 | 武汉江扬环境科技股份有限公司 | Method for producing anti-pollution modified polyvinylidene fluoride hollow fiber membrane |
| CN103007787A (en) * | 2012-12-19 | 2013-04-03 | 绍兴锐意环保科技有限公司 | Novel method for amphiphilic copolymer modified PVDF (Polyvinylidene Fluoride) hollow fiber ultra-filtration membranes |
| KR101539608B1 (en) * | 2013-03-14 | 2015-08-17 | 에치투엘 주식회사 | Polyvinylidene fluoride Hollow Fiber Membranes and Preparation Thereof |
| CN103394293B (en) * | 2013-07-22 | 2016-01-20 | 东华大学 | A kind of preparation method of hydrophilia polyvinylidene fluoride hollow fiber membrane |
| DE102013221209B4 (en) * | 2013-10-18 | 2019-09-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Silicone hydrogel, process for its preparation, molded part thereof and uses |
| CN105709618B (en) * | 2016-04-19 | 2019-08-09 | 贵阳学院 | By the Pvdf Microporous Hollow Fiber Membrane of amphipathic three block copolymer blending and modifying |
| CN107362698B (en) * | 2017-07-31 | 2020-12-15 | 苏州苏净环保新材料有限公司 | Preparation method and application of lasting hydrophilic polyvinylidene fluoride membrane |
| CN107998908B (en) * | 2017-12-14 | 2021-04-13 | 北京林业大学 | Preparation method of super-hydrophilic organic membrane based on micro-nano substrate |
| KR20230147742A (en) * | 2018-11-09 | 2023-10-23 | 에프. 호프만-라 로슈 아게 | Fused ring compounds |
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| CN111363550A (en) * | 2018-12-26 | 2020-07-03 | 上海新阳半导体材料股份有限公司 | Selective etching liquid composition and preparation method and application thereof |
| CN109888346A (en) * | 2019-02-18 | 2019-06-14 | 山东星火科学技术研究院 | Using electrostatic spinning technique supported catalyst in the preparation method of the fuel battery proton exchange film on membrane fiber surface |
| CN110127898A (en) * | 2019-05-21 | 2019-08-16 | 南京东极环境科技有限公司 | A kind of method of multidimensional catalysis oxidation advanced treatment of industrial wastewater |
| KR102101027B1 (en) * | 2019-10-25 | 2020-04-20 | 본제이워터스 주식회사 | A water treatment membrane and manufacturing method of thereof |
| CN113083030A (en) * | 2021-03-30 | 2021-07-09 | 浙江师范大学 | Anti-pollution high-flux modified polymer separation membrane and preparation method thereof |
| CN114518293B (en) * | 2022-02-23 | 2023-03-10 | 淮安沛能电力技术有限公司 | Durability detection equipment and detection method for electric power safety protection rope |
| CN115569539A (en) * | 2022-10-17 | 2023-01-06 | 安徽省海徽化工有限公司 | Ultrafiltration membrane for treating acrylic resin wastewater |
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