CN109364581B - Preparation method of super-hydrophobic dustproof stainless steel filter screen - Google Patents
Preparation method of super-hydrophobic dustproof stainless steel filter screen Download PDFInfo
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- CN109364581B CN109364581B CN201811508516.1A CN201811508516A CN109364581B CN 109364581 B CN109364581 B CN 109364581B CN 201811508516 A CN201811508516 A CN 201811508516A CN 109364581 B CN109364581 B CN 109364581B
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- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 64
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 25
- 239000010935 stainless steel Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 230000001699 photocatalysis Effects 0.000 claims abstract description 14
- 238000005530 etching Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 239000000243 solution Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000011259 mixed solution Substances 0.000 claims description 24
- 238000002791 soaking Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- 230000002209 hydrophobic effect Effects 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 230000007935 neutral effect Effects 0.000 claims description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 6
- 239000002210 silicon-based material Substances 0.000 claims description 6
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 6
- 235000019441 ethanol Nutrition 0.000 claims description 5
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 4
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 4
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 4
- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 claims description 4
- 229960003493 octyltriethoxysilane Drugs 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 239000004111 Potassium silicate Substances 0.000 claims description 3
- WSXIMVDZMNWNRF-UHFFFAOYSA-N antimony;ethane-1,2-diol Chemical compound [Sb].OCCO WSXIMVDZMNWNRF-UHFFFAOYSA-N 0.000 claims description 3
- JVLRYPRBKSMEBF-UHFFFAOYSA-K diacetyloxystibanyl acetate Chemical compound [Sb+3].CC([O-])=O.CC([O-])=O.CC([O-])=O JVLRYPRBKSMEBF-UHFFFAOYSA-K 0.000 claims description 3
- YGUFXEJWPRRAEK-UHFFFAOYSA-N dodecyl(triethoxy)silane Chemical compound CCCCCCCCCCCC[Si](OCC)(OCC)OCC YGUFXEJWPRRAEK-UHFFFAOYSA-N 0.000 claims description 3
- 239000002086 nanomaterial Substances 0.000 claims description 3
- -1 polydimethylsiloxane Polymers 0.000 claims description 3
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- OYGYKEULCAINCL-UHFFFAOYSA-N triethoxy(hexadecyl)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OCC)(OCC)OCC OYGYKEULCAINCL-UHFFFAOYSA-N 0.000 claims description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 3
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 claims description 2
- 238000007146 photocatalysis Methods 0.000 claims description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 2
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 claims description 2
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 2
- FZMJEGJVKFTGMU-UHFFFAOYSA-N triethoxy(octadecyl)silane Chemical compound CCCCCCCCCCCCCCCCCC[Si](OCC)(OCC)OCC FZMJEGJVKFTGMU-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 33
- 239000000428 dust Substances 0.000 description 16
- 230000001954 sterilising effect Effects 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 9
- 238000004659 sterilization and disinfection Methods 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000004887 air purification Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 230000000593 degrading effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 125000001165 hydrophobic group Chemical group 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 150000001282 organosilanes Chemical class 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000006011 modification reaction Methods 0.000 description 3
- 239000011941 photocatalyst Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
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- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- SBRXLTRZCJVAPH-UHFFFAOYSA-N ethyl(trimethoxy)silane Chemical compound CC[Si](OC)(OC)OC SBRXLTRZCJVAPH-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- SLYCYWCVSGPDFR-UHFFFAOYSA-N octadecyltrimethoxysilane Chemical compound CCCCCCCCCCCCCCCCCC[Si](OC)(OC)OC SLYCYWCVSGPDFR-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/10—Filter screens essentially made of metal
- B01D39/12—Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
- B01D2239/0428—Rendering the filter material hydrophobic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1291—Other parameters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Catalysts (AREA)
Abstract
The invention belongs to the field of new materials, and provides a preparation method of a super-hydrophobic dustproof stainless steel filter screen, wherein a gully-shaped structure is formed on the surface of the stainless steel filter screen through etching, and a super-hydrophobic and photocatalytic substance coating is further attached to obtain the super-hydrophobic filter screen.
Description
Technical Field
The invention belongs to the field of new materials, and provides a preparation method of a super-hydrophobic dustproof stainless steel filter screen.
Background
The current situation of air deterioration constantly takes place, haze weather is more frequent emergence. With the health importance of people, the air quality is more and more concerned, and various products for treating air pollution are continuously published. In this market surge, the most profitable product is the air purification product. The air purification product can absorb harmful substances such as inhalable particles, formaldehyde and the like in the air, and has the effect of purifying the air, so that the air quality is ensured, and the human health of a user is protected. However, the core part of the air purification filter screen is easy to cover dust, difficult to clean and easy to be attached with harmful bacteria after being used for a period of time. The serious dust covering on the surface of the air filter screen can cause the blockage of meshes, the attenuation of purification efficiency and even the secondary pollution caused by the re-release of sucked particulate matters and harmful bacteria. The metal air filter screen used by the traditional air purifier is not treated at all, the surface of the metal air filter screen is easily stained with dust after being used for a period of time, the metal air filter screen is difficult to clean, a large amount of harmful bacteria are attached, and a large amount of manpower, material resources and financial resources are wasted when the filter screen is cleaned, so that the problem that the surface of the traditional filter screen is easily coated with dust is urgently solved.
The leaf effect of the load inspires that the preparation and application of the super-hydrophobic surface are rapidly developed in recent years, and the super-hydrophobic surface refers to a surface with a water drop contact angle of more than 150 degrees and a lower rolling angle. Two major conditions for constructing a superhydrophobic surface are: the micro-nano rough structure is constructed on the surface of the material and the low surface energy substance is modified on the surface. The super-hydrophobic surface has low surface energy and low adsorption capacity to dust, and the dust can roll off and not stick on the surface, so that the self-cleaning performance is achieved, and the super-hydrophobic surface has a good application prospect. In 2017, von jek et al mixed inorganic nano materials with heterocyclic siloxane in an ethanol-water solution, and then sprayed on the calligraphy and painting to obtain the super-hydrophobic calligraphy and painting with good dust-proof capability (patent publication No. CN 108178986A). Zhou Rui et al processed a micropore array on the surface of a copper sheet by a laser direct writing technique, prepared the copper sheet into a copper mesh, then carried out surface micro-treatment with laser, processed a micro-nano dual structure, obtained a super-amphiphobic copper mesh, which has oil-borne super-hydrophobic and water-borne super-oleophobic properties and can be used for filtering light oil and heavy oil at the same time (patent publication No. CN 108159735A). The traditional filter screen only has common filtering capacity, the capacity of sterilizing and degrading harmful gases such as formaldehyde and the like needs to be improved, and no effective dustproof, sterilizing and self-cleaning method exists at present. Therefore, how to overcome the technical defects of the conventional filter screens becomes one of the problems to be solved in the art.
Disclosure of Invention
Aiming at the defects of the technology, the invention provides a preparation method of a super-hydrophobic dustproof stainless steel filter screen, the method forms a gully-shaped structure on the surface of the stainless steel filter screen by etching, and further attaches a super-hydrophobic and photocatalytic substance coating to obtain the super-hydrophobic filter screen, and the filter screen has low surface energy and can reduce the attachment of dust and oil stains. Semiconductor nano TiO2、ZnO、g-C3N4Due to the excellent photocatalytic oxidation capacity, the non-toxic and stable characteristics of the photocatalytic materials, pathogenic microorganisms can be effectively inactivated, and the functions of effectively catalyzing and degrading harmful gases and inhibiting bacteria and killing bacteria are achieved. The filter screen can be used for air purification systems such as an air purifier, fresh air and the like, and household filtration systems such as a range hood, a refrigerator, an air conditioner and the like, has simple preparation method and mild reaction conditions,is suitable for large-scale production.
The specific technical scheme of the invention is as follows:
a preparation method of a super-hydrophobic dustproof stainless steel filter screen comprises the following specific steps:
1) the clean stainless steel filter screen is soaked in the acid etching solution for 3-20 min at room temperature. Washing the filter screen until the pH value is neutral, removing the residual solution on the surface, and drying for later use; soaking the prepared etched filter screen in a sodium hydroxide solution at the temperature of 60-90 ℃ for 1.5-2 h;
2) adding hydrophobic organic silicon, a hydrophilic silicon-containing compound, a photocatalytic substance and a catalyst into a water-alcohol-ammonia system according to a certain proportion to prepare a modified solution; stirring at 500 rpm for 30min to mix; putting a filter screen into the mixed solution, soaking for 6 hours, and then putting the filter screen into a 120 ℃ oven for curing for 8 hours to obtain a super-hydrophobic filter screen;
the etching liquid in the step (1) is FeCl3、H2SO4HCl and HNO3One or more mixed solutions with the concentration of 0.05-2 moL/L; wherein the optimal choice is FeCl3HCl with the concentration of 0.1-2 mol/L and 0.05-0.5 mol/L respectively; the soaking time in the etching process is preferably 5 minutes; the prepared etched filter screen is put into a sodium hydroxide solution with the temperature of 60-90 ℃ to be soaked for 1.5-2h, so that more hydroxyl groups can be connected to the surface of the filter screen, and modification is facilitated; the concentration of the sodium hydroxide solution is 0.05-2 moL/L;
in the step (2), each liter of the modified solution contains 10-100 g of hydrophobic organic silicon, 5-100 g of hydrophilic silicon-containing compound, 5-50g of photocatalytic substance and 1-8 g of catalyst; the balance being a water-alcohol-ammonia system mixture;
the hydrophobic organic silicon in the step (2) is one or more of gamma-aminopropyl triethoxysilane, gamma-glycidoxypropyl trimethoxysilane, gamma-methacryloxypropyl trimethoxysilane, hexadecyl triethoxysilane, polydimethylsiloxane, octyl triethoxysilane, hexamethyldisilazane, methyl triethoxysilane, ethyl triethoxysilane, vinyl triethoxysilane, dodecyl triethoxysilane, octadecyl triethoxysilane and corresponding methoxysilane;
the hydrophilic silicon-containing compound is one or more of sodium silicate, potassium silicate, ethyl orthosilicate, aminopropyl triethoxysilane and the like;
the photocatalytic substance is semiconductor nano TiO2、g-C3N4Nano ZnO2Or one or more of other nano materials with the performances of adsorption, photocatalysis and the like; the photocatalytic substance has the characteristics of sterilization and catalytic degradation of harmful gases such as formaldehyde and the like, and can achieve the purpose of self-cleaning.
In the system, hydrophilic organic silicon is hydrolyzed in a water-alcohol-ammonia system to form nano silicon dioxide which has synergistic effect with the nano photocatalyst, so that the roughness of the surface of the filter screen is increased, the contact area of dust and the surface of the filter screen is reduced, and the surface tension of the filter screen is reduced by the nano silicon dioxide which is loaded on the surface of the filter screen after being crosslinked with the hydrophobic organic silicon, so that the adhesive force of the filter screen to the dust is reduced.
The catalyst can increase the reaction rate of the hydrophobic modification reaction and improve the efficiency, and is specifically selected from one of dibutyltin dilaurate, p-toluenesulfonic acid, antimony acetate and ethylene glycol antimony.
In the step (2), the mass ratio of the mixture of water, alcohol and ammonia is (0.3-6.5) to (20) (0.1-1.5), wherein the water is deionized water, the alcohol is absolute ethyl alcohol, and the ammonia is ammonia water, and under the system, the above substances can be subjected to modification reaction; wherein, ammonia water is used as a catalyst to accelerate the modification reaction, and the hydrophobic effect of the ammonia water is obviously better than that of a pure absolute ethyl alcohol solvent after the ammonia water is added;
the super-hydrophobic dustproof stainless steel filter screen prepared by the method has the following detection results that the contact angle and the rolling angle of a 5-microliter water drop are used for representing the hydrophobicity, the higher the contact angle is, the better the super-hydrophobicity is, and the detection results are as follows:
friction stability: the prepared super-hydrophobic stainless steel filter screen is rubbed in a reciprocating way for 60 times (reciprocating distance is 20cm) under a weight of 100g, and the contact angle is measured;
ultrasonic stability: putting the prepared filter screen into an ultrasonic cleaning machine, performing ultrasonic treatment for 60min, and measuring a contact angle;
the results are as follows:
the prepared super-hydrophobic stainless steel filter screen has a gully-shaped structure with higher roughness on the surface (figure 1) and excellent hydrophobicity. FIG. 2A shows a conventional screen in contact with water, with droplets spreading over the screen surface; FIG. 2B shows that the water drops form obvious spherical water drops on the super-hydrophobic filter screen, which shows that the super-hydrophobic filter screen has good hydrophobicity. When dust falls on the super-hydrophobic filter screen, the surface pollutants can be removed only by slightly washing with clean water, which shows that the super-hydrophobic filter screen has good self-cleaning performance (figure 3). The filter screen has abrasion resistance and ultrasonic stability (figure 4), and the contact angle of the super-hydrophobic filter screen is basically unchanged whether the filter screen is rubbed or ultrasonically cleaned. Meanwhile, the used semiconductor nano TiO2、g-C3N4And the semiconductor nano ZnO and the like have good effects of sterilizing and inhibiting bacteria and degrading organic pollutants, the sterilizing efficiency of the filter screen is more than 95 percent, and the degrading efficiency of the filter screen to formaldehyde is more than 90 percent.
The super-hydrophobic dustproof stainless steel filter screen with the performance can be applied to air purification systems such as air purifiers and fresh air, and household filtering systems such as smoke exhaust ventilators, refrigerators and air conditioners, can be used for directly preparing traditional stainless steel filter screens into super-hydrophobic filter screens with corresponding specifications, and can be used for directly modifying the filter screens in the household appliances so as to meet the use requirements.
Compared with the prior art, the invention has the advantages that:
1. the filter screen is etched, the surface roughness is increased, the organosilane polymer containing hydrophilic and hydrophobic groups is coated on the surface of the filter screen, after solidification, the bonding property of the organosilane polymer containing hydrophilic and hydrophobic groups and the filter screen can be improved, the surface energy can be reduced, the super-hydrophobic effect is achieved, the stability of the hydrophobic property of the filter screen is improved, and due to the super-hydrophobic surface, the organosilane polymer containing hydrophilic and hydrophobic groups is kept dry constantly, so that the organosilane polymer containing hydrophilic and hydrophobic groups is not beneficial to the survival of microorganisms and has a.
2. The surface of the coating has strong antifouling and dustproof capabilities and has a self-cleaning characteristic.
3. Due to semiconductor nano TiO2ZnO and g-C3N4The existence of the photocatalyst enables the photocatalyst to have excellent sterilization performance,and can effectively degrade harmful gases such as formaldehyde and the like.
4. The preparation process is simple, the reaction condition is mild, and the large-scale production is facilitated.
Drawings
FIG. 1 SEM images of different magnifications of the filter screens prepared in example 1:
wherein A and B are coating samples of example 1; c and D are uncoated samples, and compared with the uncoated sample with hydrophilicity, the surface of the coated sample has a gully-shaped structure with higher roughness and better hydrophobic property;
FIG. 2 is a schematic diagram of the hydrophobic property detection of the original stainless steel filter screen and the super-hydrophobic coating prepared in example 1;
in the figure, A is an original filter screen; b is the superhydrophobic screen prepared in example 1; FIG. 2A shows the original screen in contact with water, with the droplets spreading over the screen surface; FIG. 2B shows that water drops form obvious spherical water drops on the super-hydrophobic filter screen, which indicates that the super-hydrophobic filter screen has good hydrophobicity;
FIG. 3 is a graph showing a self-cleaning test of the filter prepared in example 1;
as can be seen from the figure, when the dust falls on the super-hydrophobic filter screen, the pollutants on the surface can be removed only by slightly washing with clean water, which shows that the super-hydrophobic filter screen has good self-cleaning performance;
figure 4. mechanical stability test pattern for filter screens prepared in example 1:
A. testing the wear resistance; B. testing the ultrasonic resistance; as can be seen from the figure, the contact angle of the super-hydrophobic filter screen is basically unchanged whether the super-hydrophobic filter screen is rubbed or ultrasonically cleaned;
FIG. 5 shows the photocatalytic sterilization efficiency of the superhydrophobic filter screen under the illumination of the superhydrophobic filter screen prepared in example 1.
FIG. 6 shows the decomposition efficiency of the superhydrophobic screen prepared in example 1 on formaldehyde as the illumination time is prolonged.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but it should not be construed that the scope of the above subject matter is limited to the following examples. All the technologies realized based on the above contents of the present invention belong to the scope of the present invention, and the following embodiments are all completed by adopting the conventional prior art except for the specific description.
Example 1
At room temperature, a stainless steel filter screen with the size of 2cm multiplied by 2cm is firstly placed on FeCl3And etching the substrate for 10min by using an/HCl mixed solution (the concentrations of the/HCl mixed solution are 0.2mol/L and 0.05mol/L respectively). And (4) washing the filter screen until the pH value is neutral, removing the residual solution on the surface, and drying for later use. Adding the etched filter screen into 0.1mol/L sodium hydroxide solution at 85 ℃ for soaking for 2h to ensure that more hydroxyl groups are connected to the surface of the filter screen to facilitate modification, taking out the filter screen and washing the filter screen to be neutral;
4.0g of hexamethyldisilazane, 3.0g of ethyl orthosilicate, 0.3g of nano-ZnO and 0.4g g-C3N4And 5 drops of dibutyltin dilaurate are added into a mixed solution of 88mL of absolute ethyl alcohol, 5mL of ammonia water and 7mL of deionized water, and the mixture is stirred for 30min at the stirring speed of 500 revolutions per minute to be uniformly mixed, so as to prepare a modified solution; and finally, soaking the filter screen in the mixed solution for 6 hours, and placing the filter screen in a 120 ℃ oven for curing for 8 hours to obtain the super-hydrophobic filter screen.
The prepared super-hydrophobic filter screen is subjected to related performance detection, and the result is as follows:
FIG. 1 is an SEM image of the filter screen prepared in example 1 at different magnifications:
wherein A and B are coating samples of example 1; c and D are uncoated samples, and it can be seen from the comparison that the surface of the filter screen prepared in example 1 has a gully-shaped structure with higher roughness and better hydrophobic property than the uncoated sample with hydrophilicity;
FIG. 2 is a schematic diagram of the original stainless steel filter screen and the detection of the hydrophobic property of the super-hydrophobic coating prepared in example 1;
in the figure, A is an original filter screen; b is the superhydrophobic screen prepared in example 1; FIG. 2A shows the original screen in contact with water, with the droplets spreading over the screen surface; FIG. 2B shows that water drops form obvious spherical water drops on the super-hydrophobic filter screen, which indicates that the super-hydrophobic filter screen has good hydrophobicity;
FIG. 3 is a graph illustrating a self-cleaning test of the filter prepared in example 1;
as can be seen from the figure, when dust falls on the super-hydrophobic filter screen prepared in example 1, the surface pollutants can be removed only by slightly washing with clean water, which shows that the super-hydrophobic filter screen has good self-cleaning performance;
as can be seen from the ultrasonic stability test in fig. 4A, the contact angle of the superhydrophobic filter screen prepared by the method of the present invention still does not change much after being subjected to ultrasonic treatment for 60 minutes, and the friction test (fig. 4B) performed on the surface of the filter screen shows that the surface contact angle is still larger than 146 ° after being subjected to friction treatment for 60 times, which indicates that the surface performance of the superhydrophobic filter screen is stable.
As can be seen from FIG. 5, the sterilization efficiency of the superhydrophobic filter screen prepared by the method of the invention on Escherichia coli is continuously increased along with the extension of illumination time, and the sterilization efficiency is more than 99% after 180 minutes, so that the superhydrophobic filter screen has excellent sterilization and antibacterial properties.
As can be seen from figure 6, the super-hydrophobic filter screen prepared by the method is used for catalyzing and degrading formaldehyde, the degradation efficiency of the super-hydrophobic filter screen on formaldehyde is over 90 percent after 110 minutes, and the material has good formaldehyde removal efficiency and wide application prospect.
Example 2
At room temperature, a stainless steel screen of 6cm × 4cm is firstly placed on FeCl3And etching the substrate for 10min by using an/HCl mixed solution (the concentrations of the/HCl mixed solution are 1.0mol/L and 0.06mol/L respectively). And (4) washing the filter screen until the pH value is neutral, removing the residual solution on the surface, and drying for later use. Adding the etched filter screen into 0.2mol/L sodium hydroxide solution at 78 ℃ for soaking for 2h to ensure that more hydroxyl groups are connected to the surface of the filter screen to facilitate modification, taking out the filter screen and washing the filter screen to be neutral;
4.5g of octyl triethoxysilane, 2.2g of gamma-glycidoxypropyltrimethoxysilane, 1.6g of sodium silicate and 0.2g of nano TiO2And 0.6g of ZnO and 6 drops of p-toluenesulfonic acid are added into a mixed solution of 90mL of absolute ethyl alcohol, 2mL of ammonia water and 6mL of deionized water, and the mixture is stirred for 30min at a stirring speed of 500 revolutions per minute, so that the materials are uniformly mixed to prepare a modified solution. And finally, soaking the filter screen in the mixed solution for 6 hours, and placing the filter screen in a 120 ℃ oven for curing for 8 hours to obtain the super-hydrophobic filter screen.
Example 3
Firstly, a stainless steel filter screen of 8cm multiplied by 4cm is placed on FeCl at room temperature3And etching the substrate for 5min by using an/HCl mixed solution (the concentrations of the/HCl mixed solution are 1.2mol/L and 0.3mol/L respectively). And (4) washing the filter screen until the pH value is neutral, removing the residual solution on the surface, and drying for later use. Adding the etched filter screen into 0.2mol/L sodium hydroxide solution at 90 ℃ for soaking for 2h to ensure that more hydroxyl groups are connected to the surface of the filter screen to facilitate modification, taking out the filter screen and washing the filter screen to be neutral;
4.5g of octyl triethoxysilane, 2.6g of dodecyl tripotassium oxysilane, 1.8g of sodium silicate and 0.8gg-C3N4And 0.6g of nano ZnO and 4 drops of dibutyltin dilaurate are added into a mixed solution of 90mL of absolute ethyl alcohol, 2mL of ammonia water and 8mL of deionized water, and the mixed solution is stirred for 30min at a stirring speed of 500 revolutions per minute so as to be uniformly mixed, and a modified solution is prepared. And finally, soaking the filter screen in the mixed solution for 6 hours, and placing the filter screen in a 120 ℃ oven for curing for 8 hours to obtain the super-hydrophobic filter screen.
Example 4
Firstly, using FeCl to the surface of a stainless steel filter screen with the thickness of 8cm multiplied by 5cm at room temperature3And etching for 5min by using/HCl mixed solution (the concentrations of which are 0.6mol/L and 0.2mol/L respectively). Washing the filter screen with deionized water to remove residual solution on the surface, adding the etched filter screen into 0.8moL/L sodium hydroxide solution at 90 ℃ to soak for 2 hours, taking out and washing to be neutral;
4.6g of hexadecyl triethoxy silane, 2.2g of dodecyl triethoxy silane, 2.5g of potassium silicate and 1.2g of nano TiO2And 0.8g g-C3N4And 3 drops of ethylene glycol antimony are added into a mixed solution of 90mL of absolute ethyl alcohol, 4mL of ammonia water and 8mL of deionized water, and the mixture is stirred for 30min at a stirring speed of 500 revolutions per minute so as to be uniformly mixed, thus preparing a modified solution. And (3) soaking the filter screen in the mixed solution for 6h, and curing in a 120 ℃ oven for 8h to obtain the super-hydrophobic filter screen.
Example 5
At room temperature, a stainless steel screen of 10cm × 4cm is firstly placed on FeCl3Etching in a mixed solution of HCl and/or water (the concentration of the mixed solution is 0.8mol/L and 0.4mol/L) for 6 min. Washing the filter screen until the pH value is neutral, and removing the residual solution on the surfaceAnd drying for later use. Adding the etched filter screen into 0.2mol/L sodium hydroxide solution at 82 ℃ for soaking for 2h to ensure that more hydroxyl groups are connected to the surface of the filter screen to facilitate modification, taking out the filter screen and washing the filter screen to be neutral;
3.4g of octadecyl trimethoxy silane, 1.8g of ethyl trimethoxy silane, 2.6g of ethyl orthosilicate and 0.8g of nano TiO2And 0.8g g-C3N4And 5 drops of antimony acetate are added into a mixed solution of 90mL of absolute ethyl alcohol, 4mL of ammonia water and 3mL of deionized water, and the mixture is stirred for 30min at a stirring speed of 500 revolutions per minute so as to be uniformly mixed, thus preparing a modified solution. And finally, soaking the filter screen in the mixed solution for 6 hours, and placing the filter screen in a 120 ℃ oven for curing for 8 hours to obtain the super-hydrophobic filter screen.
Examples of the experiments
The super-hydrophobic stainless steel filter screens and untreated filter screens of examples 1 to 5 were used as blank groups, and the filter screens subjected to modification treatment in the prior art were used as control groups, and the results of the tests of the relevant standards were as follows:
note: the dust adhesion rate was calculated by the following formula:
w＝(m1-m2)/S
wherein w: mass of dust covering the surface of the filter screen per unit area, unit: g/m2；
m1: mass before the filter screen covers dirt, unit: g;
m2: mass after the filter screen covers dirt, unit: g;
s: area of screen surface, unit: m is2。
The formaldehyde degradation time is as follows: and 3 h.
Sterilizing time under illumination: and 3 h.
As can be seen from the data in Table 1, the average dust attachment rate of the super-hydrophobic stainless steel filter screens prepared in the embodiments 1 to 5 of the present invention is less than 0.30g/m2The sterilization efficiency is more than or equal to 84.1 percent, the formaldehyde degradation rate is more than or equal to 86 percent, and the contact angle is more than or equal to 143 degrees; all data are clearIs significantly better than the blank group and the control group, wherein the super-hydrophobic filter screen prepared in example 1 has an excellent dust-proof performance and a dust attachment rate of 0.085g/m2The sterilization efficiency is 98.6%, the formaldehyde degradation rate is 92%, the contact angle is 154 degrees, and the comprehensive performance is excellent.
The principles and practice of the present invention are illustrated in 5 embodiments, and the above description of the embodiments may be used to help understand the principles and practice of the present invention. The above embodiments are not intended to be limiting. Also, those skilled in the art can make flexible changes in the embodiments and applications based on the principles and methods of the present invention.
Claims (1)
1. A preparation method of a super-hydrophobic dustproof stainless steel filter screen is characterized by comprising the following steps: the method comprises the following specific steps:
1) soaking a clean stainless steel filter screen in an acid etching solution for 5min at room temperature, washing the filter screen until the pH is neutral, removing the solution remained on the surface, and drying for later use; soaking the prepared etched filter screen in a sodium hydroxide solution at the temperature of 60-90 ℃ for 1.5-2 h;
2) adding hydrophobic organic silicon, a hydrophilic silicon-containing compound, a photocatalytic substance and a catalyst into a water-alcohol-ammonia system according to a certain proportion to prepare a modified solution; stirring at 500 rpm for 30min to mix; putting a filter screen into the mixed solution, soaking for 6 hours, and then putting the filter screen into a 120 ℃ oven for curing for 8 hours to obtain a super-hydrophobic filter screen;
the etching liquid in the step (1) is FeCl3The concentration of the mixed solution of HCl/HCl is 0.1-2 mol/L and 0.05-0.5 mol/L respectively;
the concentration of the sodium hydroxide solution in the step (1) is 0.05-2 moL/L;
in the step (2), each liter of the modified solution contains 10-100 g of hydrophobic organic silicon, 5-100 g of hydrophilic silicon-containing compound, 5-50g of photocatalytic substance and 1-8 g of catalyst; the balance being a water-alcohol-ammonia system mixture;
the hydrophobic organic silicon in the step (2) is one or more of gamma-aminopropyl triethoxysilane, gamma-glycidoxypropyl trimethoxysilane, gamma-methacryloxypropyl trimethoxysilane, hexadecyl triethoxysilane, polydimethylsiloxane, octyl triethoxysilane, hexamethyldisilazane, methyl triethoxysilane, ethyl triethoxysilane, vinyl triethoxysilane, dodecyl triethoxysilane, octadecyl triethoxysilane and corresponding methoxysilane;
the hydrophilic silicon-containing compound is one or more of sodium silicate, potassium silicate, ethyl orthosilicate and aminopropyltriethoxysilane;
the photocatalytic substance is semiconductor nano TiO2、g-C3N4Semiconductor nano ZnO or other composite nano materials with adsorption and photocatalysis performances;
the catalyst is one of dibutyltin dilaurate, p-toluenesulfonic acid, antimony acetate and ethylene glycol antimony;
and (3) the mass ratio of the mixture of the water, the alcohol and the ammonia system in the step (2) is 0.3-6.5: 20: 0.1-1.5, wherein the water in the mixture of the water, the alcohol and the ammonia system is deionized water, the alcohol is absolute ethyl alcohol, and the ammonia is ammonia water.
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| KR20080111680A (en) * | 2007-06-19 | 2008-12-24 | (주) 코리아 인바이텍 | Corrosion preventing filter screen of water filter |
| CN106367756A (en) * | 2016-12-02 | 2017-02-01 | 江苏理工学院 | Preparation method of hydrophobic micro-nano structure aluminum surface |
| CN107090197A (en) * | 2017-05-19 | 2017-08-25 | 东南大学 | A kind of super-amphiphobic coating with formaldehyde degradation by photocatalytic oxidation process function and its preparation method and application |
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