WO1999016603A1 - Membrane poreuse ceramique a liant plastique - Google Patents
Membrane poreuse ceramique a liant plastique Download PDFInfo
- Publication number
- WO1999016603A1 WO1999016603A1 PCT/JP1998/004320 JP9804320W WO9916603A1 WO 1999016603 A1 WO1999016603 A1 WO 1999016603A1 JP 9804320 W JP9804320 W JP 9804320W WO 9916603 A1 WO9916603 A1 WO 9916603A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- porous membrane
- aggregate particles
- binder
- ceramic
- particles
- Prior art date
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- 239000012528 membrane Substances 0.000 title claims abstract description 79
- 239000000919 ceramic Substances 0.000 title claims abstract description 36
- 239000011230 binding agent Substances 0.000 title claims abstract description 35
- 229920003023 plastic Polymers 0.000 title claims abstract description 23
- 239000004033 plastic Substances 0.000 title claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 103
- 239000011148 porous material Substances 0.000 claims abstract description 38
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 abstract description 18
- 238000001914 filtration Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 26
- 238000000465 moulding Methods 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 239000000463 material Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 238000005259 measurement Methods 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 238000010304 firing Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
- 229920005992 thermoplastic resin Polymers 0.000 description 8
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000002585 base Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- -1 for example Polymers 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910000077 silane Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000004962 Polyamide-imide Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000010137 moulding (plastic) Methods 0.000 description 2
- 229920002312 polyamide-imide Polymers 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0041—Inorganic membrane manufacture by agglomeration of particles in the dry state
- B01D67/00411—Inorganic membrane manufacture by agglomeration of particles in the dry state by sintering
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0295—Inhomogeneous curing or hardening, e.g. accelerated curing of surface regions of a concrete article; Influencing the setting or hardening process to generate physical or mechanical effects, e.g. to create cracks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
- B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
- B01D39/2079—Other inorganic materials, e.g. ceramics the material being particulate or granular otherwise bonded, e.g. by resins
-
- 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
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0041—Inorganic membrane manufacture by agglomeration of particles in the dry state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0038—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/08—Specific temperatures applied
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
Definitions
- the present invention relates to a porous membrane made of ceramics using plastic as a binder.
- Ceramic porous membranes with a large number of fine pores have higher physical strength and durability than polymer porous membranes such as polymer membranes, so they have higher reliability and higher corrosion resistance. It has advantages such as little deterioration even after washing with alkali etc., and relatively easy control of the pore size that determines the filtration capacity. Solid-liquid separation, liquid separation, gas separation Alternatively, it is useful as a separation membrane used for filtration, etc.
- the amount of ceramic that determines the filtration capacity is high.
- the formation method and performance of the porous film are technical points.
- a ceramic porous membrane can be obtained by calcining ceramic particles, firing at a high temperature of about 5H00CTC, and sintering the ceramic particles.
- the above-described method can provide a porous film having excellent strength and corrosion resistance because the ceramic particles are firmly bonded to each other by sintering, but can be practically used unless fired at a high temperature of usually 50O 000C.
- a porous membrane having high strength cannot be formed.
- the present invention has been made in view of the above-described problem of firing ceramics, and an object of the present invention is to provide a porous film that can be easily and inexpensively manufactured without requiring firing. To provide. Disclosure of the invention
- a porous membrane in which aggregate particles made of ceramics are bound by a binder made of plastic, and the aspect ratio of the aggregate particles is 2.0 or less.
- a porous membrane is provided, wherein the content of aggregate particles in the porous membrane is »% by volume.
- the ceramic porous membrane of the present invention can also form pores by shrinkage of plastic due to heating, and is preferably formed by injection molding.
- FIG. 1 is a schematic diagram showing an apparatus for measuring the water permeability of a porous membrane of the present invention.
- a ceramic porous membrane is a material in which a large number of fine particles are formed between ceramic particles. Solid-liquid separation, liquid separation, gas separation, etc., utilizing the filtration function of the pores. Can be suitably used for separation and neglect of
- the porous membrane of the present invention is characterized by having a structure in which aggregate particles made of ceramics are bonded via a bonding material made of plastic, instead of a structure in which ceramic particles are bonded together by sintering as in the related art. is there.
- the porous film is not based on sintering, it can be easily manufactured at a relatively low temperature at a relatively low temperature, and can be manufactured at low cost.Because it does not involve firing shrinkage like sintering, more precise molding is possible. . That is, unlike sintering, finer control of the pore diameter is possible, and there is no need to perform machining after firing, so that productivity can be improved.
- the aggregate particles are ceramic particles that form a skeleton of a porous membrane.
- the material of the aggregate particles is not particularly limited as long as it is ceramic.
- silica glass, alumina, zirconia, mullite, titania, magnesia or the like can be used. These mixtures and the like can be used.
- the aspect ratio of the aggregate particles that is, the ratio of the major axis to the minor axis of the particle is 2.0 or less.
- the particle shape becomes closer to a sphere, so that the properties at the time of molding can be secured.
- the aggregate particles can be dispersed in a state close to the closest packing, even when a slight shrinkage occurs after the molding, it is possible to maintain the pores with high precision.
- the binder is a material for binding the aggregate particles forming the skeleton of the porous membrane, and is made of plastic.
- the use of a binder made of plastic eliminates the need for high temperatures such as sintering during molding, and improves the fluidity during molding due to the fluidity of plastic.
- the plastic used as the binder is not particularly limited as long as the strength after molding can be ensured.
- the following thermoplastic resins and thermosetting resins can be suitably used.
- thermoplastic resins or thermosetting resins.
- thermoplastic resin for example, resins such as polypropylene, hard vinyl chloride, high-density polyethylene, and polyethylene terephthalate can be used.
- resins such as polypropylene, hard vinyl chloride, high-density polyethylene, and polyethylene terephthalate
- tetrafluoroethylene or polycarbonate It is more preferable to use polyvinylidene fluoride, polyetherimide, reinforced polyethylene terephthalate, polyphenylene sulfide, polyamideimide, polyetheretherketone, or polyimide.
- thermosetting resin examples include a phenol resin, an epoxy resin, an unsaturated polyester, a urea resin, a melamine resin, and a urethane resin.
- the compatible low-inorganic ceramic and the organic alast are more strongly bonded through silanol bonds. Both do not cause separation at the interface, and the strength of the porous film can be further increased.
- the pores of the porous membrane of the present invention can be formed by utilizing the voids between the aggregate particles as they are, or by utilizing the difference in the coefficient of thermal expansion between the aggregate particles and the binder.
- the particle size distribution of the aggregate particles is as narrow as possible to a specific particle size, specifically, in the powder. It is preferable to use a powder such that the particle size ratio of the largest particle to the smallest particle in the 90% particle group is within 2 and to increase the content of the aggregate particles to 80 ⁇ 3 ⁇ 4%: LL.
- the amount of binder is relatively small, so the voids between the aggregate particles cannot be filled with the thread composite. That is, voids remaining between the aggregate particles can be used as pores of the porous membrane.
- method B powder having a specific particle size is used as in method A, but the aggregate particles are used during molding.
- the molding is performed under the condition that no gap is generated between them.
- the content of aggregate particles slightly lower, about 60 ⁇ 80 * volume%.
- the aggregate particles are in contact with each other from the time of molding to after cooling, the aggregate can be formed without shrinking due to the aggregate particles.
- the amount of the binder is relatively large, the voids between the aggregate particles are filled by the binder during molding, but the binder having a high thermal expansion coefficient shrinks more than the aggregate particles having a low thermal expansion coefficient during cooling. As a result, voids are formed inside the compact.
- the voids thus generated are used as pores of the porous membrane.
- the aggregate particles i.e. the coefficient of thermal expansion of the ceramic particles 0.5 ⁇ 10X 1 0 one 6 k-1 order number
- binder i.e. thermal expansion coefficient of the Arasuchikku is 1C 2 ⁇ X 10- 6 k one about one thing often.
- pore diameter The control of the average diameter (hereinafter referred to as “pore diameter”) that determines the separation and transmission function of the porous membrane differs depending on the above-described pore formation method.
- pores are formed by Method A, mainly select the particle size of aggregate particles appropriately. By doing so, the desired pore size can be adjusted.
- a porous membrane having an average pore diameter of about 1 ⁇ 5 ⁇ m can be obtained.
- the diameter of the aggregate can be adjusted by the particle size of the aggregate particles, the type of the binder plastic, the cooling method, etc., but the average particle size is about 10 ⁇ m.
- aggregate particles are used, a porous membrane having a pore diameter of about 0.002-0.02 ⁇ ra can be obtained.
- a liquid-permeable membrane can be prepared using the A method for a substrate part with a relatively large pore diameter, and a B method for a relatively small-pore diameter liquid-permeable membrane part. is there.
- the base material is injection-molded using a thermoplastic resin or a thermosetting resin with a high melting temperature as a binder, and a thermoplastic resin or a thermosetting resin with a low melting temperature is used as a binder, and the periphery of the base material is formed. It is preferable to use a method of coating the liquid membrane portion.
- the content of the aggregate particles in the porous membrane of the present invention needs to be 60%.
- the content is determined by the volume ratio between the binder and the aggregate particles, and does not include the volume of the pores.
- the ratio of the aggregate particles is less than 60 ⁇ :% by volume, the 3 ⁇ 4fj & property during molding is improved, but the advantages of the ceramic such as high strength and high corrosion resistance are reduced, and the formation of pores is also reduced. It will be difficult.
- the reason why the content of the aggregate particles is set to 99% by volume or less is that the content of the binder decreases when the content exceeds the volume%, and it is difficult to bond the aggregate particles to each other over the porous membrane. This is because
- the porous membrane of the present invention is: It is molded by various molding methods according to the method of the plastic molding, but is preferably formed by injection molding.
- a porous membrane formed by injection molding is different from a porous membrane formed by sintering, and is characterized by high precision of pore diameter.
- the porous membrane of the present invention can control the diameter by controlling the particle diameter of the aggregate particles, and the average pore diameter is about 10 (angstrom) to about 10 ⁇ m. Since it is possible to form a membrane, it can be suitably used as a separation membrane / permeation membrane for solid-liquid separation, liquid separation, gas separation and the like.
- a separation membrane or a filtration membrane by forming a finer porous membrane on the surface of the ceramic porous membrane of the present invention as a base material.
- the production process consists of three steps: preparation of aggregate particles, preparation of binder particles, and kneading and molding of both.
- the type of ceramic is selected in consideration of the strength, corrosion resistance, etc. required for the aggregate, and the aggregate particles are adjusted to the desired average particle size and particle size distribution.
- the aggregate particles commercially available ceramic powders may be used, but those having an average particle diameter capable of obtaining a desired field diameter may be selected.
- the particle size distribution is as narrow as possible and the powder with a specific particle size is uniform, specifically, the particle size ratio of the largest particle to the smallest particle in 90% of the particle group in the powder. It is preferable to use a powder having a particle diameter of 2 or less, but it is also possible to use a commercially available powder whose particle size distribution is adjusted by elutriation or the like.
- the aggregate particles prepared as described above include silane force. It is preferable to perform a pretreatment for the ring.
- sarray can be used, but a silane coupling agent may be added at the time of mixing the aggregate particles and the binder using the integral blending method.
- binder particles Preparation of binder particles
- the type of plastic is selected in consideration of the strength and the like required for the binder, and binder particles having a desired average particle size and particle size distribution are prepared.
- the aggregate particles and the binder particles are mixed, and the aggregate particles are divided into the binder. From mixing 'dispersion to molding', it is preferable to carry out at a temperature at which the plastic of the binder retains appropriate properties.For example, by setting the temperature slightly higher than the melting of the plastic, the dispersibility ' The performance is improved.
- a kneader, a triroll mill or the like can be suitably used for the above mixing and dispersion treatment.
- the mixture is kneaded, then pelletized, and molded to obtain a molded product.
- the molding can be performed according to a known plastic molding method such as extrusion molding or injection molding. However, in view of productivity, reduction of production cost, etc., injection molding is preferable.
- the porous membrane of the present invention can be formed by a molding method according to an plastic, it has a feature that, in addition to high dimensional accuracy of a molded product, it has high strength and corrosion resistance like a ceramic.
- thermoplastic resin used as the plastic in the porous membrane of the present invention
- the ceramic and the thermoplastic resin are used at about 40 CTC. It is possible to melt and separate the plastic and recover and reuse the ceramic.
- Polyethylene terephthalate a thermoplastic resin, is used as the binder
- a commercially available spherical silica glass powder having an average particle size of 10 ⁇ m and an aspect ratio of almost 1 is used, and is subjected to silane treatment by a pretreatment method using a spray. ring Processing was performed.
- the obtained pellets were melted at 29 CTC and injection-molded, and formed into a bottomed cylinder with a diameter of 10 bands, a film pressure of 1 thigh, and a length of 15 bands to form a porous membrane.
- Tables 1 and 2 show the measured values of the average pore diameter and the water permeability of the obtained porous membrane.
- the average pore diameter and water permeability were measured by the following methods.
- the average pore diameter of the porous membrane was measured by a mercury intrusion method.
- the measurement sample is housed in the closed container 1, and the connection pipe 2 is airtightly connected to the open end of the measurement sample S1 or S2.
- tap water is passed through an activated carbon filter and an ion exchanger, and pure water that has passed through an ultrafiltration membrane having a molecular weight cut-off of # 2000 is supplied from a pressurized tank 3 at a predetermined pressure to each sample S 1 or S 2. And flows out of the closed vessel 1 through the discharge pipe 4.
- the water supply pressure that is, the pressure difference between the inside and outside of the sample, is 0.2-0.5 kg / cm2 for the sample S1 for measurement, and 1-3 kg / cm2 for the sample S2 for measurement.
- the permeation amount Q (1 / m2 ⁇ hr ⁇ (K & / cra2)) of pure water was calculated by the following equation (1).
- Samples S 1 and S 2 for measurement were left in water overnight before measurement, and then subjected to vacuum degassing while immersed in water.
- Example 2 In the same manner as in Example 1, polyamideimide was used as the binder, and silica was used as the aggregate particles. Using Guatemala glass, injection molding was performed at 35 CTC to produce a substrate.
- a porous membrane was produced in the same manner as in Example 1 except that the content of the aggregate particles was set to 50% by volume.
- Tables 1 and 2 list values such as the pore diameter and water permeability of the obtained porous membrane.
- a porous membrane was produced in the same manner as in Example 1, except that the aspect ratio of the aggregate particles was 2.2.
- Tables 1 and 2 list the measured values of the pore diameter and water permeability of the obtained porous membrane.
- Table 1 Raw materials for porous membranes Aggregate particles in porous membrane i Binder Aggregate content
- Example 1 In Example 1 in which the content of aggregate particles is in the range of 60 to 90% by volume, desired pores can be formed, whereas in Comparative Example 1 in which the content of aggregate particles is less than 60% by volume. No pores could be formed.
- the porous film of Example 1 having an aspect ratio of 2.0 or less was excellent in moldability, whereas the porous film of Comparative Example 2 having an aspect ratio of 2.0 was difficult to mold.
- Example 2 a porous membrane having finer pores is formed on the surface of the ceramic porous membrane of the present invention as a base material to form a separation membrane and a membrane. It is also possible. Industrial applicability
- the porous membrane of the present invention uses plastic as a binder, it can be manufactured easily and inexpensively by a molding method based on plastics, and the productivity can be improved.
- the content of ceramic particles is set to 60 ⁇ product%, it has remarkable features of ceramic such as strength and corrosion resistance, and it is possible to precisely control the pore size which is important as a separation membrane and a filtration membrane. is there.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtering Materials (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002303858A CA2303858A1 (en) | 1997-09-30 | 1998-09-28 | Porous membrane comprising ceramic and containing plastic as binder |
EP98944250A EP1020276A4 (en) | 1997-09-30 | 1998-09-28 | PLASTIC USING CERAMIC CONTAINING POROUS MEMBRANE |
AU91857/98A AU9185798A (en) | 1997-09-30 | 1998-09-28 | Porous membrane comprising ceramic and containing plastic as binder |
KR1020007003369A KR20010015657A (ko) | 1997-09-30 | 1998-09-28 | 플라스틱을 결합재로 하는 세라믹으로 이루어진 다공질막 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9265827A JPH11100283A (ja) | 1997-09-30 | 1997-09-30 | プラスチックを結合材とするセラミックよりなる多孔質膜 |
JP9/265827 | 1997-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999016603A1 true WO1999016603A1 (fr) | 1999-04-08 |
Family
ID=17422612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/004320 WO1999016603A1 (fr) | 1997-09-30 | 1998-09-28 | Membrane poreuse ceramique a liant plastique |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1020276A4 (ja) |
JP (1) | JPH11100283A (ja) |
KR (1) | KR20010015657A (ja) |
AU (1) | AU9185798A (ja) |
CA (1) | CA2303858A1 (ja) |
WO (1) | WO1999016603A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001003815A2 (de) * | 1999-07-09 | 2001-01-18 | Neubert, Susanne | Membrane als verbundmembrane zur trennung von gelösten und suspendierten stoffen sowie gelösten salzen von ihrer trägerflüssigkeit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004337833A (ja) * | 2003-01-17 | 2004-12-02 | Toshiba Ceramics Co Ltd | 気体分離部材 |
CN113119391B (zh) * | 2019-12-30 | 2023-03-17 | 荣耀终端有限公司 | 陶瓷树脂复合壳体及其制备方法和终端 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5175B1 (ja) * | 1969-11-18 | 1976-01-05 | Sumitomo Electric Industries | |
JPS5270988A (en) * | 1975-06-18 | 1977-06-13 | Asahi Chem Ind Co Ltd | Porous membrane |
JPS6366242A (ja) * | 1986-09-05 | 1988-03-24 | Hitachi Chem Co Ltd | 通気性部材 |
JPH08241737A (ja) * | 1995-03-07 | 1996-09-17 | Matsushita Electric Ind Co Ltd | 酸素選択性透過膜およびそれを用いた空気電池 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3953241A (en) * | 1970-03-12 | 1976-04-27 | Westinghouse Electric Corporation | Heat resistant substrates and battery separators made therefrom |
US5130342A (en) * | 1988-10-14 | 1992-07-14 | Mcallister Jerome W | Particle-filled microporous materials |
-
1997
- 1997-09-30 JP JP9265827A patent/JPH11100283A/ja not_active Withdrawn
-
1998
- 1998-09-28 CA CA002303858A patent/CA2303858A1/en not_active Abandoned
- 1998-09-28 KR KR1020007003369A patent/KR20010015657A/ko not_active Application Discontinuation
- 1998-09-28 AU AU91857/98A patent/AU9185798A/en not_active Abandoned
- 1998-09-28 EP EP98944250A patent/EP1020276A4/en not_active Withdrawn
- 1998-09-28 WO PCT/JP1998/004320 patent/WO1999016603A1/ja not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5175B1 (ja) * | 1969-11-18 | 1976-01-05 | Sumitomo Electric Industries | |
JPS5270988A (en) * | 1975-06-18 | 1977-06-13 | Asahi Chem Ind Co Ltd | Porous membrane |
JPS6366242A (ja) * | 1986-09-05 | 1988-03-24 | Hitachi Chem Co Ltd | 通気性部材 |
JPH08241737A (ja) * | 1995-03-07 | 1996-09-17 | Matsushita Electric Ind Co Ltd | 酸素選択性透過膜およびそれを用いた空気電池 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1020276A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001003815A2 (de) * | 1999-07-09 | 2001-01-18 | Neubert, Susanne | Membrane als verbundmembrane zur trennung von gelösten und suspendierten stoffen sowie gelösten salzen von ihrer trägerflüssigkeit |
WO2001003815A3 (de) * | 1999-07-09 | 2001-05-25 | Neubert Susanne | Membrane als verbundmembrane zur trennung von gelösten und suspendierten stoffen sowie gelösten salzen von ihrer trägerflüssigkeit |
Also Published As
Publication number | Publication date |
---|---|
JPH11100283A (ja) | 1999-04-13 |
EP1020276A1 (en) | 2000-07-19 |
CA2303858A1 (en) | 1999-04-08 |
AU9185798A (en) | 1999-04-23 |
EP1020276A4 (en) | 2001-05-23 |
KR20010015657A (ko) | 2001-02-26 |
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