CN115141536A - Antibacterial colorful steel plate and production process thereof - Google Patents
Antibacterial colorful steel plate and production process thereof Download PDFInfo
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- CN115141536A CN115141536A CN202210775709.3A CN202210775709A CN115141536A CN 115141536 A CN115141536 A CN 115141536A CN 202210775709 A CN202210775709 A CN 202210775709A CN 115141536 A CN115141536 A CN 115141536A
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- antibacterial
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- finish paint
- polytetrafluoroethylene
- modified polytetrafluoroethylene
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 130
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title abstract description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 131
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 124
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 124
- 239000003973 paint Substances 0.000 claims abstract description 96
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 75
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 40
- 239000004917 carbon fiber Substances 0.000 claims abstract description 40
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 37
- 239000011787 zinc oxide Substances 0.000 claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000005060 rubber Substances 0.000 claims abstract description 16
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- 239000004645 polyester resin Substances 0.000 claims abstract description 15
- 229920001225 polyester resin Polymers 0.000 claims abstract description 15
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- 239000002562 thickening agent Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-YPZZEJLDSA-N carbon-10 atom Chemical group [10C] OKTJSMMVPCPJKN-YPZZEJLDSA-N 0.000 claims abstract 2
- 238000002156 mixing Methods 0.000 claims description 49
- 238000001035 drying Methods 0.000 claims description 39
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- 238000002360 preparation method Methods 0.000 claims description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 24
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- 238000005507 spraying Methods 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 claims description 16
- 239000000725 suspension Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 238000005238 degreasing Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000009832 plasma treatment Methods 0.000 claims description 13
- 239000004408 titanium dioxide Substances 0.000 claims description 13
- 239000002202 Polyethylene glycol Substances 0.000 claims description 12
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- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 12
- 229920001223 polyethylene glycol Polymers 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 11
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
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- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- 150000001408 amides Chemical class 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 claims description 2
- CFFZDZCDUFSOFZ-UHFFFAOYSA-N 3,4-Dihydroxy-phenylacetic acid Chemical compound OC(=O)CC1=CC=C(O)C(O)=C1 CFFZDZCDUFSOFZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 241000894006 Bacteria Species 0.000 abstract description 12
- 238000004140 cleaning Methods 0.000 abstract description 9
- 230000003373 anti-fouling effect Effects 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 108
- 230000002829 reductive effect Effects 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 238000002161 passivation Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000004049 embossing Methods 0.000 description 5
- 230000003385 bacteriostatic effect Effects 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000003115 biocidal effect Effects 0.000 description 3
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- 230000003247 decreasing effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
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- 238000011056 performance test Methods 0.000 description 3
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- 230000001681 protective effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229940010514 ammonium ferrous sulfate Drugs 0.000 description 2
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- IMBKASBLAKCLEM-UHFFFAOYSA-L ferrous ammonium sulfate (anhydrous) Chemical compound [NH4+].[NH4+].[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O IMBKASBLAKCLEM-UHFFFAOYSA-L 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
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- 230000001678 irradiating effect Effects 0.000 description 2
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- 229920000570 polyether Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 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
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
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- VNWKTOKETHGBQD-YPZZEJLDSA-N carbane Chemical group [10CH4] VNWKTOKETHGBQD-YPZZEJLDSA-N 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 239000013527 degreasing agent Substances 0.000 description 1
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- 125000001153 fluoro group Chemical group F* 0.000 description 1
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- 125000000524 functional group Chemical group 0.000 description 1
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- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Plant Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The application relates to the field of color coated steel plates, and particularly discloses an antibacterial color steel plate and a production process thereof. The antibacterial color steel plate sequentially comprises a metal substrate, a plasma layer, a primer layer and a finish paint layer from bottom to top, wherein the finish paint comprises the following components in parts by weight: 50-60 parts of polyester resin, 15-20 parts of filler, 2.2-3.5 parts of curing agent, 5-8 parts of rubber elastomer, 15-18 parts of polymethyl methacrylate, 0.5-1 part of flatting agent, 2-4 parts of film-forming assistant, 1-3 parts of thickening agent, 4-10 parts of carbon fiber and 10-20 parts of antibacterial modified polytetrafluoroethylene; the raw materials of the antibacterial modified polytetrafluoroethylene comprise polytetrafluoroethylene powder, zinc oxide and graphene oxide in a mass ratio of 1 (0.03-0.05) to (0.4-0.6). The antibacterial color steel plate has the advantages of good hydrophobicity, difficulty in adhering bacteria and dust, strong antibacterial property and good self-cleaning antifouling effect.
Description
Technical Field
The application relates to the technical field of color coated steel plates, in particular to an antibacterial color steel plate and a production process thereof.
Background
The traditional method for producing the color steel plate is generally that a base plate is subjected to pretreatment such as degreasing and the like and then is subjected to passivation treatment, after a passivation film is formed on the surface of the base plate, the base plate is sequentially subjected to working procedures such as primer spraying, drying, finish spraying, drying, color ink printing or color film pressing and the like, and the color steel plate meeting the production standard is prepared. The color steel plate has the mechanical strength of common steel plates and good corrosion resistance, and color steel plates with different appearances such as wood grains, marble grains, metal texture, cloth grains, leather grains and the like can be manufactured by using different colors of printing ink or different embossing plastic films.
In the prior art, a chinese patent application with application number CN2020110536608 discloses a method for preparing a color steel plate, which specifically includes the following steps: s1, pretreatment: degreasing the metal substrate at 55-75 deg.C for 4-8s, washing and drying; s2, passivation: passivating the pretreated metal substrate by using an improved surface treating agent to form a passivation film on the surface of the metal substrate, wherein the thickness of the passivation film is 1.5-2.5 mu m, and the passivation temperature is 50-70 ℃ to obtain a passivation plate; s3, drying: drying the passivated board by using a hot air dryer at the drying temperature of 160-180 ℃ for 8-15s; s4, finishing paint coating: coating finish paint on the surface of the passivation plate, and baking the passivation plate for 30-40s at 260-280 ℃ to form a finish paint layer to obtain a preformed product; s5, post-processing: and (4) sequentially carrying out post-treatment processes of printing ink printing, drying, coating a protective layer, drying again and embossing on the preformed product to obtain a finished product of the colored steel plate.
In view of the above-mentioned related technologies, the inventors have found that a color steel sheet manufactured by this process has a short manufacturing time and high production efficiency, but the color steel sheet has no antibacterial property and is not suitable for inner and outer wall decoration of medical treatment, sterile rooms, pharmaceutical factories, food factories, cosmetic factories, and the like, which require high antibacterial property.
Disclosure of Invention
The application provides an antibacterial color steel plate and a production process thereof, in order to enable the color steel plate to have antibacterial property and be used for decorating inner and outer walls with higher antibacterial property requirements.
In a first aspect, the present application provides an antibacterial color steel plate, which adopts the following technical scheme:
the antibacterial colored steel plate sequentially comprises a metal substrate, a plasma layer, a primer layer and a finish paint layer from bottom to top, wherein the finish paint layer is formed by curing finish paint, and the finish paint comprises the following components in parts by weight: 50-60 parts of polyester resin, 15-20 parts of filler, 2.2-3.5 parts of curing agent, 5-8 parts of rubber elastomer, 15-18 parts of polymethyl methacrylate, 0.5-1 part of flatting agent, 2-4 parts of film-forming assistant, 1-3 parts of thickening agent, 4-10 parts of carbon fiber and 10-20 parts of antibacterial modified polytetrafluoroethylene;
the raw materials of the antibacterial modified polytetrafluoroethylene comprise polytetrafluoroethylene powder, zinc oxide and graphene oxide in a mass ratio of 1 (0.03-0.05) to (0.4-0.6).
Through adopting above-mentioned technical scheme, zinc oxide has excellent bacterinertness, can interact with the cell wall on bacterium surface, destroy the cell wall of bacterium, thereby cause the content to be released and kill the bacterium, zinc oxide can also be under ultraviolet irradiation, produce hole electron pair, thereby change surface adsorption's water or hydroxyl into hydroxyl radical, change adsorbed oxygen into active oxygen, hydroxyl radical and active oxygen have extremely strong chemical activity, thereby can react with most organic matters and kill most bacterium and virus, polytetrafluoroethylene is a difficult viscous polymer material, its surface is hydrophobic, graphite oxide can block cell and surrounding environment interaction, prevent the continuous appreciation of cell, thereby make the cell lose the activity, add antibiotic modified polytetrafluoroethylene in finish paint layer, can make finish paint layer hydrophobicity improve, prevent liquid and bacterium adhesion, thereby improve the bacterinertness and the antifouling self-cleaning nature of colored sheet.
Optionally, the preparation method of the antibacterial modified polytetrafluoroethylene comprises the following steps:
(1) Mixing zinc oxide, deionized water and polyethylene glycol, adjusting pH value to 9-10, and performing ultrasonic dispersion to obtain suspension;
(2) Adding polytetrafluoroethylene powder into the suspension, uniformly mixing, keeping the pressure for 3-5min in an environment of- (0.01-0.05) MPa, and drying for 1-2h at 50-60 ℃ to prepare modified polytetrafluoroethylene;
(3) Under the condition of ray irradiation, acrylic acid is used for carrying out graft polymerization on the modified polytetrafluoroethylene to prepare graft modified polytetrafluoroethylene;
(4) Uniformly mixing the grafted modified polytetrafluoroethylene, the graphene oxide and deionized water, adding aniline, heating to 120-125 ℃, mixing for 30-60min, and drying at 60-65 ℃.
By adopting the technical scheme, the zinc oxide has small particle size and large surface activity, and van der waals force, electrostatic force and the like among particles are added to enable the zinc oxide powder to be easily agglomerated, so that a large agglomerate with a plurality of weak connection interfaces is formed, polyethylene glycol is used as a dispersing agent of the zinc oxide, and the pH value is 9-10, under the condition, the zinc oxide has the largest potential value in a water system, the system is most stable, hydrolysis cannot occur, the polyethylene glycol is a high molecular compound with a steric hindrance stabilizing effect, the attraction among particles can be reduced, and the dispersion stability is improved; the suspension with stable dispersion is mixed with polytetrafluoroethylene, under the action of negative pressure, zinc oxide is filled in a microporous structure of the polytetrafluoroethylene, the prepared modified polytetrafluoroethylene is grafted with acrylic acid under the radiation of rays, a grafting chain is composed of polyacrylic acid, so that a large number of carboxylic acid groups are contained on the grafted modified polytetrafluoroethylene, the affinity of the grafted modified polytetrafluoroethylene when the grafted modified polytetrafluoroethylene is mixed with graphene oxide is improved, graphene oxide molecules have oxygen-containing functional groups such as carboxyl, carbonyl, hydroxyl and epoxy groups, better hydrophilicity is given to the graphene oxide, the dipole interaction and hydrogen bond acting force between the grafted modified polytetrafluoroethylene and the graphene oxide are improved, the graphene oxide is loaded on the grafted modified polytetrafluoroethylene, under the action of aniline, the graphene oxide is reduced into graphene, the hydrophilicity of the graphene and the grafted modified polytetrafluoroethylene is reduced, bacteria, dust and the like are further enabled to be not easily adhered to a finish paint layer, and the zinc oxide loaded in the microporous structure in the polytetrafluoroethylene can be continuously released along the multilayer structure of the graphene, and the durability of the bacteria is improved.
Optionally, in the suspension, the mass ratio of the polyethylene glycol to the deionized water to the zinc oxide is (0.01-0.03): (3-4): 1; the mass ratio of the graphene oxide to the aniline to the deionized water is (0.4-0.6): (0.9-1.2): 10.
By adopting the technical scheme, the use amounts of the polyethylene glycol and the zinc oxide in the suspension are controlled, so that the attraction among zinc oxide particles in the suspension is reduced, the zinc oxide particles are uniformly dispersed in deionized water, and agglomeration is not generated, thereby the zinc oxide particles are uniformly distributed in a polytetrafluoroethylene microporous structure; the graphene oxide is reduced under the action of aniline, so that the graphene oxide is loaded on the graft modified polytetrafluoroethylene, and the polytetrafluoroethylene loaded with zinc oxide is coated, so that the early release of zinc oxide is reduced, the release period of zinc oxide is prolonged, and the antibacterial durability is improved.
Optionally, the finish paint is prepared by the following method:
uniformly mixing polyester resin, filler, a curing agent, a flatting agent, carbon fiber and a rubber elastomer, melting and extruding, tabletting, crushing and grinding to prepare granules;
mixing polymethyl methacrylate, a film forming additive, a thickening agent, antibacterial modified polytetrafluoroethylene and toluene to prepare a spraying liquid, wherein the mass ratio of the toluene to the polymethyl methacrylate is 2 (1.5-1.8);
spraying the spray coating liquid on the granules heated to 85-90 ℃ by an aerosol spraying method, and cooling to obtain the finish paint.
By adopting the technical scheme, the carbon fibers, the rubber elastomer, the polyester resin and the like are mixed and melted, the insect resistance strength and the scratch resistance of the coating can be improved, the flexibility of the finish coating can be improved, the coating has certain bending avoiding capability when being impacted, the impact resistance can be further improved, and then the components such as polymethyl methacrylate, antibacterial modified polytetrafluoroethylene and the like are mixed and sprayed on the granular materials made of the polyester resin, the carbon fibers, the rubber elastomer and the like, so that the antifouling self-cleaning effect and the antibacterial effect of the finish coating are improved, and the impact resistance of the finish coating is improved.
Optionally, the carbon fiber is pretreated by:
mixing 2-5 parts by weight of carbon nano tube, 0.05-0.1 part by weight of lanthanum chloride and 3-5 parts by weight of ethanol, adding 4-10 parts by weight of carbon fiber, uniformly mixing, standing at room temperature for 5-6h, drying, mixing with 1-3 parts by weight of polytetrafluoroethylene powder, heating to 370-400 ℃, preserving heat for 0.5-1h, crushing and grinding.
By adopting the technical scheme, the carbon nano tubes, the lanthanum chloride and the ethanol are uniformly mixed, the carbon fibers are placed in the mixed solution, the lanthanum chloride is loaded on the carbon fibers, the nano-scale carbon nano tubes can be grafted on the surfaces of the micro-scale carbon fibers, the wettability of the carbon fibers and the polytetrafluoroethylene is improved, and the carbon fibers are uniformly mixed in the polytetrafluoroethylene; lanthanum chloride can perform coordination reaction with fluorine atoms in polytetrafluoroethylene group molecules, so that the interface bonding performance of carbon fibers and polytetrafluoroethylene is improved, the formation of hard fiber particles due to debonding in the friction process of the carbon fibers is reduced, the wear resistance of a finish paint layer is improved, and meanwhile, the addition of the polytetrafluoroethylene can also improve the hydrophobicity of the finish paint layer and improve the self-cleaning antifouling effect; in addition, lanthanum chloride contains rare earth elements, so that the lanthanum chloride has antibacterial performance and can further improve the antibacterial property of the finish paint layer.
Optionally, the antibacterial modified polytetrafluoroethylene is pretreated by the following steps:
mixing titanium dioxide, nano-alumina and ethanol uniformly, adding antibacterial modified polytetrafluoroethylene, soaking at room temperature for 8-10h, and drying.
By adopting the technical scheme, polytetrafluoroethylene which is subjected to zinc oxide impregnation, acrylic acid grafting and graphene oxide coating is mixed with titanium dioxide, nano aluminum oxide and ethanol, because the graphene reduced by aniline has amino groups and is positive, the titanium dioxide is hydrolyzed in the ethanol to enable the graphene to have hydroxyl groups and negative charges, active hydroxyl groups exist on the surface of the nano aluminum oxide, the titanium dioxide, the graphene, the nano aluminum oxide and the graphene are assembled by static electricity, the titanium dioxide and the nano aluminum oxide are loaded on the graphene, the chemical modification on the surface of the antibacterial modified polytetrafluoroethylene is realized, the surface roughness of the antibacterial modified polytetrafluoroethylene is increased, water drops cannot enter grooves with rough surfaces and are contacted with a composite surface formed on the surface of the antibacterial modified polytetrafluoroethylene, the reduction of the contact area is also beneficial to the rolling of the water drops, the contact angle is increased, the hydrophobicity of the graphene is further improved, the titanium dioxide has the functions of resisting bacteria and purifying air, and the effects of no toxicity, no odor, no stimulation, good heat resistance and stable chemical property, the compactness of a finish paint layer can be improved, the impact resistance of the nano aluminum oxide can be increased, and the scratch resistance of the finish paint layer can be improved.
Optionally, the rubber elasticity is one or two of SBS and SEBS.
By adopting the technical scheme, the SBS and the SEBS can improve the flexibility of the finish paint layer, so that the finish paint layer has certain flexibility when being impacted, and the impact resistance is improved.
Optionally, the curing agent is selected from one or more of hydroxyalkyl amide HAA, triglycidyl isocyanurate and hydroxyalkyl amide;
the filler is selected from one or more of kaolin, mica powder, calcium carbonate and talcum powder.
By adopting the technical scheme, the hydroxyalkyl amide HAA is used as the curing agent, so that the yellowing problem of the finish paint layer can be improved, and the curing speed of the finish paint layer can be accelerated; the filler can play a role in framework and filling, reduce the using amount of resin, improve the construction performance of the coating and improve the coating quality of the finish paint layer.
In a second aspect, the present application provides a production process of an antibacterial color steel plate, which adopts the following technical scheme:
a production process of an antibacterial colorful steel plate comprises the following steps:
plasma treatment: degreasing a metal base material, washing with water, drying, and performing plasma treatment on the surface of the metal base material by using plasma equipment at room temperature to form a plasma layer;
preparing a primer layer: coating primer on the metal substrate after plasma treatment, and drying to form a primer layer;
preparing a finish paint layer: and spraying finish paint on the primer layer of the metal substrate, heating to 200-210 ℃, baking for 10-15min, and cooling to form a finish paint layer.
By adopting the technical scheme, the metal base material is degreased, surface impurities and oil stains are removed, the plasma treatment effect is improved, then the plasma layer is formed on the metal base material, so that the adhesive force between the metal base material and the primer layer is improved, and finally the finish paint layer is coated, so that the antibacterial property and the appearance quality of the color plate are improved.
Optionally, the thickness of the primer layer is 4-6 μm, the thickness of the finish coat layer is 8-12 μm, and the thickness of plasma treatment and the like is 50-500nm.
By adopting the technical scheme, the priming paint layer and the finish paint layer play a role in protecting the metal substrate, the corrosion resistance of the metal substrate can be improved by the priming paint layer, the appearance quality of the color plate is ensured by the finish paint layer, the antibacterial property of the color plate is improved, and the adhesive force between the metal substrate and the priming paint layer is increased by the plasma layer.
In summary, the present application has the following beneficial effects:
1. because this application adopts polyester resin as the substrate of finish paint layer to the doping uses zinc oxide and graphene oxide to carry out antibiotic modification to polytetrafluoroethylene, can not only improve the bacterinertness of finish paint layer, has still improved the hydrophobicity of finish paint layer, makes the bacterium be difficult for the adhesion on finish paint layer, and the bacterium of adhesion also can be killed fast moreover, reaches antibiotic self-cleaning effect of antifouling again promptly.
2. In the application, the polytetrafluoroethylene is preferably dipped in the zinc oxide suspension under negative pressure, acrylic acid is grafted on the polytetrafluoroethylene, and then the antibacterial modified polytetrafluoroethylene is prepared by coating the graphene, and the zinc oxide is filled in a microporous structure of the polytetrafluoroethylene and gradually released from a layer structure of the graphene, so that the antibacterial period is prolonged, and the antibacterial durability is improved.
3. The carbon fiber is pretreated by preferably adopting lanthanum chloride, the carbon nano tube and polytetrafluoroethylene in the application, the lanthanum chloride and the carbon nano tube can increase the dispersibility of the carbon fiber in the polytetrafluoroethylene, the hydrophobicity of the carbon fiber can be improved by adding the polytetrafluoroethylene, the antifouling and self-cleaning effects of the finish paint layer are further improved, and the lanthanum chloride has antibacterial property and can also improve the antibacterial capacity of the finish paint layer.
Detailed Description
Preparation examples 1 to 5 of antibacterial modified Polytetrafluoroethylene
Preparation example 1: uniformly mixing 10kg of polytetrafluoroethylene, 0.3kg of zinc oxide and 4kg of graphene oxide to prepare the antibacterial modified polytetrafluoroethylene.
Preparation example 2: (1) Mixing 0.3kg of zinc oxide, deionized water and polyethylene glycol, adjusting the pH value to 9, and performing ultrasonic dispersion to prepare a suspension, wherein the mass ratio of the polyethylene glycol to the deionized water to the zinc oxide is 0.01;
(2) Adding 10kg of polytetrafluoroethylene powder into the suspension, uniformly mixing, keeping the pressure for 5min under the environment of-0.01 MPa, and drying for 2h at 50 ℃ to prepare modified polytetrafluoroethylene, wherein the mass ratio of the polytetrafluoroethylene powder to the zinc oxide is 1;
(3) At an intensity of 0.5kGy/h 60 Under a Co radiation source, performing graft polymerization on modified polytetrafluoroethylene by using 25wt% of acrylic acid, and continuously irradiating for 48 hours by using 2.15wt% of ammonium ferrous sulfate as a polymerization inhibitor to prepare the graft modified polytetrafluoroethylene, wherein the mass ratio of the acrylic acid to the polytetrafluoroethylene powder is 1;
(4) Uniformly mixing the grafted and modified polytetrafluoroethylene, 4kg of graphene oxide and deionized water, adding aniline, heating to 120 ℃, mixing for 60min, and drying at 60 ℃, wherein the mass ratio of the graphene oxide to the polytetrafluoroethylene powder is 1.4, and the mass ratio of the graphene oxide to the aniline to the deionized water is 0.4.
Preparation example 3: (1) Mixing 0.5kg of zinc oxide, deionized water and polyethylene glycol, adjusting the pH value to 10, and performing ultrasonic dispersion to prepare a suspension, wherein the mass ratio of the polyethylene glycol to the deionized water to the zinc oxide is 0.03;
(2) Adding 10kg of polytetrafluoroethylene powder into the suspension, uniformly mixing, keeping the pressure for 3min under the environment of-0.05 MPa, and drying for 1h at 60 ℃ to prepare modified polytetrafluoroethylene, wherein the mass ratio of the polytetrafluoroethylene powder to the zinc oxide is 1;
(3) At an intensity of 0.5kGy/h 60 Performing graft polymerization on the modified polytetrafluoroethylene by using acrylic acid with the concentration of 25wt% under a Co radiation source, continuously irradiating for 48 hours by using ammonium ferrous sulfate with the concentration of 2.15wt% as a polymerization inhibitor to prepare the graft modified polytetrafluoroethylene, wherein the mass ratio of the acrylic acid to the polytetrafluoroethylene powder is 1;
(4) Uniformly mixing the grafted modified polytetrafluoroethylene, 6kg of graphene oxide and deionized water, adding aniline, heating to 125 ℃, mixing for 30min, and drying at 65 ℃, wherein the mass ratio of the graphene oxide to the polytetrafluoroethylene powder is 1.6, and the mass ratio of the graphene oxide to the aniline to the deionized water is 0.6.
Preparation example 4: the difference from preparation example 3 is that the modified polytetrafluoroethylene was not subjected to acrylic acid grafting.
Preparation example 5: the difference from preparation example 3 is that step (1) and step (2) are replaced by the following method: the preparation method of the modified polytetrafluoroethylene comprises the following steps: 10kg of polytetrafluoroethylene, 0.5kg of zinc oxide, 0.015kg of polyethylene glycol and 2kg of deionized water are uniformly mixed to prepare the modified polytetrafluoroethylene.
Examples
Example 1: an antibacterial colorful steel plate comprises a metal substrate, a plasma layer, a primer layer and a finish paint layer in sequence from bottom to top, wherein the metal substrate is a hot-dip galvanized plate, the finish paint layer is formed by curing finish paint, the thickness of the finish paint layer is 8 microns, the thickness of the primer layer is 4 microns, the thickness of the plasma layer is 50nm, and the finish paint comprises the following raw materials: 50kg of polyester resin, 15kg of filler, 2.2kg of curing agent, 5kg of rubber elastomer, 15kg of polymethyl methacrylate, 0.5kg of leveling agent, 4kg of carbon fiber and 10kg of antibacterial modified polytetrafluoroethylene, wherein the filler is calcium carbonate, the antibacterial modified polytetrafluoroethylene is prepared by the preparation example 1, and the polyester resin is selected from Zhanxin CRYLCOAT
CC2441-2, the acid value is 32mgKOH/g, the curing agent is hydroxyalkylamide HAA, the rubber elastomer is SBS, the flatting agent is polyether modified polysiloxane, the film-forming auxiliary agent is dodecyl ester and dipropylene glycol butyl ether with the mass ratio of 2;
the finish paint is prepared by the following method: uniformly mixing polyester resin, filler, a curing agent, a flatting agent, carbon fiber and a rubber elastomer, melting and extruding at 120 ℃, and grinding to prepare a granular material;
mixing polymethyl methacrylate, a film forming additive, a thickening agent, antibacterial modified polytetrafluoroethylene and toluene to prepare a spray coating liquid, wherein the mass ratio of the toluene to the polymethyl methacrylate is (2);
spraying the spraying liquid on the granules heated to 85 ℃ by an aerosol spraying method, and cooling to prepare the finish paint, wherein the gas-liquid ratio is 100.
The production process of the antibacterial colored steel plate comprises the following steps:
plasma treatment: degreasing a metal substrate at a linear speed of 20m/min, wherein the concentration of degreasing solution is 25g/L, the temperature of the degreasing solution is 40 ℃, the number of degreasing points is 8pt, washing and drying are carried out, plasma treatment is carried out on the surface of the metal substrate by using plasma equipment at room temperature to form a plasma layer, mixed gas is ionized at a high pressure of 8KV to form plasma, and the treatment time is controlled to be 0.3s/m 2 The moving speed of the plasma nozzle is 20m/min, the distance from the surface of the metal base material 10 is 5mm, the mixed gas is the mixed gas of oxygen and nitrogen, the gas flow of the oxygen is 2000mL/min, and the gas flow ratio of the nitrogen to the oxygen is 3;
preparing a primer layer: coating a primer on the metal substrate treated by the plasma, and drying to form a primer layer, wherein the primer is selected from epoxy zinc-rich primer ST-HF06-I;
preparing a finish paint layer: and spraying finish paint on the primer layer of the metal substrate, heating to 200 ℃, baking for 15min, and cooling to form a finish paint layer.
Example 2: an antibacterial color steel plate comprises a metal substrate, a plasma layer and a primer layer from bottom to top in sequenceAnd a finish paint layer, wherein the metal base material is a hot-dip galvanized plate, the finish paint layer is formed by curing finish paint, the thickness of the finish paint layer is 12 microns, the thickness of the primer layer is 6 microns, the thickness of the plasma layer is 500nm, and the finish paint comprises the following raw materials: 60kg of polyester resin, 20kg of filler, 3.5kg of curing agent, 8kg of rubber elastomer, 18kg of polymethyl methacrylate, 1kg of leveling agent, 10kg of carbon fiber and 20kg of antibacterial modified polytetrafluoroethylene, wherein the filler is talcum powder, the antibacterial modified polytetrafluoroethylene is prepared by preparation example 1, and the polyester resin is selected from Zhan new CRYLCOAT
CC2441-2, a curing agent is hydroxyalkyl amide, a rubber elastomer is SEBS, a leveling agent is polyether modified polysiloxane, a film-forming aid is decaglycol ester and dipropylene glycol butyl ether with the mass ratio of 2;
the finish paint is prepared by the following method: uniformly mixing polyester resin, filler, a curing agent, a flatting agent, carbon fiber and a rubber elastomer, melting and extruding at 120 ℃, and grinding to prepare a granular material;
mixing polymethyl methacrylate, a film forming additive, a thickening agent, antibacterial modified polytetrafluoroethylene and toluene to prepare a spray coating liquid, wherein the mass ratio of the toluene to the polymethyl methacrylate is 2;
spraying the spraying liquid on the granules heated to 90 ℃ by an aerosol spraying method, and cooling to prepare the finish paint, wherein the gas-liquid ratio is 100.
The production process of the antibacterial colored steel plate comprises the following steps:
plasma treatment: degreasing a metal substrate at a linear speed of 20m/min, wherein the concentration of degreasing solution is 25g/L, the temperature of the degreasing solution is 40 ℃, the number of degreasing points is 8pt, washing and drying are carried out, plasma treatment is carried out on the surface of the metal substrate by using plasma equipment at room temperature to form a plasma layer, mixed gas is ionized at a high pressure of 8KV to form plasma, and the treatment time is controlled to be 0.3s/m 2 The moving speed of the plasma nozzle is 20m/min, the distance from the surface of the metal base material 10 is 5mm, the mixed gas is the mixed gas of oxygen and nitrogen, and the gas flow of the oxygen is2000mL/min, the gas flow ratio of nitrogen to oxygen is 3;
preparing a primer layer: coating a primer on the metal substrate treated by the plasma, and drying to form a primer layer, wherein the primer is selected from epoxy zinc-rich primer ST-HF06-I;
preparing a finish paint layer: and spraying finish paint on the primer layer of the metal substrate, heating to 210 ℃, baking for 10min, and cooling to form a finish paint layer.
Example 3: an antibacterial colored steel plate is different from the embodiment 1 in that the finishing paint is prepared by the following method: polyester resin, filler, curing agent, flatting agent, film-forming assistant, thickening agent, carbon fiber, rubber elastomer, polymethyl methacrylate and antibacterial modified polytetrafluoroethylene are mixed uniformly, melted, extruded, crushed and ground.
Example 4: an antibacterial colored steel sheet is different from example 1 in that antibacterial modified polytetrafluoroethylene in a finish paint is prepared by preparation example 2.
Example 5: an antibacterial colored steel sheet differs from example 1 in that antibacterial modified polytetrafluoroethylene in the top coat is produced by preparation example 3.
Example 6: an antibacterial colored steel sheet differing from example 1 in that antibacterial modified polytetrafluoroethylene in the top coat was produced by preparative example 4.
Example 7: an antibacterial colored steel sheet differs from example 1 in that antibacterial modified polytetrafluoroethylene in the top coat is produced by preparation example 5.
Example 8: an antibacterial colored steel plate is different from the embodiment 5 in that antibacterial modified polytetrafluoroethylene in a finishing paint layer is pretreated by the following steps: 1kg of titanium dioxide, 1kg of nano-alumina and 5kg of ethanol are mixed uniformly, added with the antibacterial modified polytetrafluoroethylene, dipped for 8 hours at room temperature and dried.
Example 9: an antibacterial colored steel plate is different from the embodiment 5 in that antibacterial modified polytetrafluoroethylene in a finishing paint layer is pretreated by the following steps: uniformly mixing 1kg of nano alumina and 5kg of ethanol, adding the antibacterial modified polytetrafluoroethylene, soaking at room temperature for 8 hours, and drying.
Example 10: an antibacterial colored steel plate is different from the embodiment 5 in that antibacterial modified polytetrafluoroethylene in a finishing paint layer is pretreated by the following steps: 1kg of titanium dioxide and 5kg of ethanol are mixed evenly, added with the antibacterial modified polytetrafluoroethylene, dipped for 8 hours at room temperature and dried.
Example 11: an antibacterial colored steel sheet differs from example 8 in that carbon fibers in a finish paint layer are pretreated by: mixing 2kg of carbon nano tube, 0.05kg of lanthanum chloride and 3kg of ethanol, adding 4kg of carbon fiber, uniformly mixing, standing at room temperature for 5 hours, drying at 100 ℃ for 6 hours, mixing with 1kg of polytetrafluoroethylene powder, heating to 370 ℃, preserving heat for 1 hour, crushing and grinding.
Example 12: an antibacterial colored steel sheet differs from example 8 in that carbon fibers in a finish paint layer are pretreated by: mixing 5kg of carbon nano tube, 0.1kg of lanthanum chloride and 5kg of ethanol, adding 10kg of carbon fiber, uniformly mixing, standing at room temperature for 6h, drying at 100 ℃ for 6h, mixing with 3kg of polytetrafluoroethylene powder, heating to 400 ℃, preserving heat for 0.5h, crushing and grinding.
Example 13: an antibacterial colored steel sheet, which is different from example 8 in that carbon fibers in the topcoat layer are pretreated as follows: mixing 2kg of carbon nano tube and 3kg of ethanol, adding 4kg of carbon fiber, uniformly mixing, standing at room temperature for 5h, drying at 100 ℃ for 6h, mixing with 1kg of polytetrafluoroethylene powder, heating to 370 ℃, keeping the temperature for 1h, crushing and grinding.
Example 14: an antibacterial colored steel sheet differs from example 8 in that carbon fibers in a finish paint layer are pretreated by: mixing 0.05kg of lanthanum chloride and 3kg of ethanol, adding 4kg of carbon fiber, uniformly mixing, standing at room temperature for 5h, drying at 100 ℃ for 6h, mixing with 1kg of polytetrafluoroethylene powder, heating to 370 ℃, preserving heat for 1h, crushing and grinding.
Example 15: an antibacterial colored steel sheet differs from example 8 in that carbon fibers in a finish paint layer are pretreated by: mixing 2kg of carbon nano tube, 0.05kg of lanthanum chloride and 3kg of ethanol, adding 4kg of carbon fiber, uniformly mixing, standing at room temperature for 5 hours, drying at 100 ℃ for 6 hours, crushing and grinding.
Comparative example
Comparative example 1: an antibacterial color steel sheet is different from example 1 in that zinc oxide is not added to antibacterial modified polytetrafluoroethylene.
Comparative example 2: an antibacterial color steel sheet is different from example 1 in that graphene oxide is not added to antibacterial modified polytetrafluoroethylene.
Comparative example 3: an antibacterial colored steel sheet is different from example 1 in that antibacterial modified polytetrafluoroethylene is not added.
Comparative example 4: an antibacterial colored steel sheet differs from example 1 in that an equivalent amount of a three-dimensional SDWED type antibacterial agent is used instead of antibacterial modified polytetrafluoroethylene.
Comparative example 5: a preparation process of a colored precoated steel plate with an antibacterial effect comprises the following steps:
(1) A hot-dip galvanized steel plate with the thickness of 0.5mm is adopted as a base metal plate;
(2) Preparing an SF-364 degreasing agent and a HICH chromium-free treatment liquid required by chemical pretreatment for chemical pretreatment;
(3) The method adopts the FLEKICOAT 646 anti-rust primer for anti-rust primer treatment;
(4) The antibacterial coating of KINOCAT 45 is adopted for the antibacterial coating treatment;
(5) Using SUPERCOAT grey-white back paint for back paint treatment;
(6) The production process comprises the following steps: the method comprises the steps of unwinding a base metal plate, two degreasing processes, a water washing process and an air drying process; chemical pretreatment and drying; treating and drying the anti-rust primer; treating the antibacterial coating and drying; back painting treatment and drying; mechanical embossing treatment and drying; pasting a protective film; and (6) rolling.
The chemical pretreatment temperature is 55 ℃, the anti-rust primer is treated in a two-roller countercurrent mode, the treatment temperature is 216 ℃, the coating thickness is 6 microns, the antibacterial coating is treated in a three-roller reverse coating mode, the treatment temperature is 232 ℃, the antibacterial coating thickness is 12 microns, the back paint is treated in a two-roller countercurrent mode, the treatment temperature is 232 ℃, and the mechanical embossing treatment: the embossing depth is 40 μm, the protective film is coated with PE protective film, and the machine speed is 45m/min.
(7) The color precoated steel plate with the antibacterial effect is prepared by adopting the process and comprises an antibacterial coating, an antirust primer layer, a first chemical treatment layer, a stainless steel plate, a second chemical treatment layer and a back paint layer which are sequentially arranged from top to bottom. Wherein, the first chemical treatment layer and the second chemical treatment layer are both chromium-free treatment liquid treatment layers.
Performance test
Colored steel sheets were prepared according to the methods of the above examples and comparative examples, and the properties of the colored steel sheets were measured with reference to the following methods, and the measurement results are reported in table 1.
1. The bacteriostatic effect is as follows: the test is carried out according to the antibacterial performance test method in appendix A of HG/T3950-2007 antibacterial paint, and the concentration of the selected inoculants is 1.7 multiplied by 10 6 CFU/mL of E.coli (ATCC 8739) and a concentration of 1.1X 10 6 The inoculation amount of the CFU/mL staphylococcus aureus (ATCC 6538P) is 0.2mL, and the colony number of the detection finish paint layer is 24 hours after the detection finish paint layer is contacted with the detection strain;
2. contact angle: detecting the contact angle of the finish paint layer by using an SL150 type contact angle tester;
3. impact resistance: the test was carried out according to GB/T1732-2020 "paint film impact resistance test".
TABLE 1 Performance test results of antibacterial color steel sheets
As is clear from the data in examples 1 to 2 and table 1, in both examples 1 and 2, the antibacterial modified polytetrafluoroethylene prepared in preparation example 1 was used, but the top coat was prepared using different raw material ratios, and the plasma layer, the primer layer and the top coat layer were sequentially disposed on the metal substrate, so that the top coat layer had good antibacterial properties, a large contact angle, less possibility of adhesion of dust and bacteria, good impact resistance, and high surface hardness.
The difference between example 3 and example 1 is that when a finish paint is prepared, a simple blending method is adopted, and the data in table 1 show that the colony count of the surface of the finish paint layer prepared in example 3 is increased, the bacteriostatic effect is weakened, and the impact resistance of the finish paint layer is reduced.
Examples 4 and 5 are different from example 1 in that example 4 and 5 use the antibacterial modified polytetrafluoroethylene prepared in preparation example 2 and preparation example 3, respectively, and table 1 shows that the surface colony number of the finish coat layer prepared in example 1 and 5 is smaller than that of example 1, and the contact angle is increased and the hydrophobic effect is improved.
In example 6 and example 7, the antibacterial modified polytetrafluoroethylene prepared in preparation example 4 and preparation example 5 were used, respectively, preparation example 4 was not acrylic-grafted to the modified polytetrafluoroethylene as compared with preparation example 3, and preparation example 5 was not dipped in a suspension of polytetrafluoroethylene and zinc oxide under negative pressure, and the number of colonies on the top coat layer prepared in example 6 was increased as compared with example 5, the contact angle was decreased, and the number of colonies in example 7 was increased, but the change of the contact angle was not large, which indicates that the use of the acrylic-grafted modified polytetrafluoroethylene improves the hydrophobicity and increases the antibacterial property of the top coat layer, while the use of the negative pressure-decreased polytetrafluoroethylene and zinc oxide mixed dipping improves the antibacterial property of the top coat layer.
Example 8 the antibacterial modified polytetrafluoroethylene prepared in preparation example 3 was pretreated with titanium dioxide and nano alumina, and the data in table 1 shows that the surface colony number of the finish coat layer prepared in example 8 is smaller than that of example 5, the contact angle is increased, and the impact resistance is improved.
The difference between examples 9 and 10 and example 8 is that when the antibacterial modified polytetrafluoroethylene was pretreated, titanium dioxide and nano alumina were not added, respectively, and the number of colonies on the surface of the topcoat layer was increased in example 9 and the number of colonies on the surface of the topcoat layer was not changed much in example 10, but the surface contact angle was decreased, compared to example 8, which indicates that titanium dioxide and nano alumina can improve antibacterial property and hydrophobicity of the topcoat layer and improve self-cleaning effect.
Examples 11 and 12 differ from example 1 in that not only the antibacterial modified polytetrafluoroethylene prepared in preparation example 3 but also it was pretreated with titanium dioxide and nano alumina, and also carbon fiber was pretreated with lanthanum chloride, carbon nanotube, polytetrafluoroethylene, etc., and the data in table 1 shows that the topcoats prepared in examples 11 and 12 have a reduced number of surface colonies and enhanced antibacterial activity as compared with example 8.
Compared with the example 12, in the example 13, lanthanum chloride is not added when the carbon fiber is pretreated, the colony number on the surface of the finishing paint layer prepared in the example 13 is increased, and the bacteriostasis effect is poor; example 14 compared with example 2, the carbon nanotubes are not added when the carbon fibers are pretreated, the bacteriostatic effect of the finish paint layer is reduced, and the impact resistance is weakened; in example 15, compared to example 12, in which polytetrafluoroethylene was not added when carbon fibers were pretreated, table 1 shows that the contact angle of the topcoat layer was decreased, the number of surface colonies was increased, and the bacteriostatic effect was reduced in example 15.
Compared with the example 1, the antibacterial modified polytetrafluoroethylene is not added with zinc oxide and graphene oxide respectively in the comparative example 1 and the comparative example 2, and the data in the table 1 shows that the total number of bacterial colonies on the surface of the finish paint layer in the comparative example 1 is large, the antibacterial effect is reduced, the impact strength is weakened, and the antibacterial property and the impact strength of the finish paint layer prepared in the comparative example 2 are reduced.
Compared with the embodiment 1, the antibacterial modified polytetrafluoroethylene is not added in the finish paint, the total number of bacterial colonies on the finish paint layer is obviously increased, the antibacterial property is obviously reduced, the contact angle of the finish paint layer is reduced, and the self-cleaning antifouling effect is weakened in the comparative example 3.
Compared with the embodiment 1, the antibacterial modified polytetrafluoroethylene in the application is replaced by the equivalent antibacterial agent in the comparative example 4, the total number of surface colonies of the finish paint layer in the comparative example 4 is large, the antibacterial effect is reduced, the contact angle is large, and the self-cleaning antifouling effect is poor.
Comparative example 5 is a colored steel sheet having an antibacterial effect prepared in the prior art, and compared with example 1, the colored steel sheet prepared in comparative example 5 has a small surface contact angle and the antibacterial effect is inferior to that of example 1.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The antibacterial colorful steel plate is characterized by sequentially comprising a metal substrate, a plasma layer, a primer layer and a finish paint layer from bottom to top, wherein the finish paint layer is formed by curing finish paint which comprises the following components in parts by weight: 50-60 parts of polyester resin, 15-20 parts of filler, 2.2-3.5 parts of curing agent, 5-8 parts of rubber elastomer, 15-18 parts of polymethyl methacrylate, 0.5-1 part of flatting agent, 2-4 parts of film-forming assistant, 1-3 parts of thickening agent, 4-10 parts of carbon fiber and 10-20 parts of antibacterial modified polytetrafluoroethylene;
the raw materials of the antibacterial modified polytetrafluoroethylene comprise polytetrafluoroethylene powder, zinc oxide and graphene oxide according to the mass ratio of 1 (0.03-0.05) to 0.4-0.6.
2. The antibacterial color steel sheet according to claim 1, characterized in that: the preparation method of the antibacterial modified polytetrafluoroethylene comprises the following steps:
(1) Mixing zinc oxide, deionized water and polyethylene glycol, adjusting pH value to 9-10, and performing ultrasonic dispersion to obtain suspension;
(2) Adding polytetrafluoroethylene powder into the suspension, uniformly mixing, keeping the pressure for 3-5min in the environment of- (0.01-0.05) MPa, and drying for 1-2h at 50-60 ℃ to prepare modified polytetrafluoroethylene;
(3) Under the condition of ray irradiation, acrylic acid is used for carrying out graft polymerization on the modified polytetrafluoroethylene to prepare graft modified polytetrafluoroethylene;
(4) Uniformly mixing the grafted modified polytetrafluoroethylene, the graphene oxide and deionized water, adding aniline, heating to 120-125 ℃, mixing for 30-60min, and drying at 60-65 ℃.
3. The antibacterial colored steel plate according to claim 2, wherein the mass ratio of polyethylene glycol, deionized water and zinc oxide in the suspension is (0.01-0.03): (3-4): 1;
the mass ratio of the graphene oxide to the aniline to the deionized water is (0.4-0.6): (0.9-1.2): 10.
4. The antibacterial colored steel plate according to claim 2, wherein the finish paint is prepared by the following method:
uniformly mixing polyester resin, filler, a curing agent, a leveling agent, carbon fiber and a rubber elastomer, melting and extruding, tabletting, crushing and grinding to prepare a granular material;
mixing polymethyl methacrylate, a film forming additive, a thickening agent, antibacterial modified polytetrafluoroethylene and toluene to prepare a spraying liquid, wherein the mass ratio of the toluene to the polymethyl methacrylate is 2 (1.5-1.8);
spraying the spray coating liquid on the granules heated to 85-90 ℃ by an aerosol spraying method, and cooling to obtain the finish paint.
5. The antibacterial colored steel sheet according to claim 4, wherein the carbon fibers are pretreated by:
mixing 2-5 parts by weight of carbon nano tube, 0.05-0.1 part by weight of lanthanum chloride and 3-5 parts by weight of ethanol, adding 4-10 parts by weight of carbon fiber, uniformly mixing, standing at room temperature for 5-6h, drying, mixing with 1-3 parts by weight of polytetrafluoroethylene powder, heating to 370-400 ℃, preserving heat for 0.5-1h, crushing and grinding.
6. The antibacterial colored steel sheet according to claim 4, wherein the antibacterial modified polytetrafluoroethylene is pretreated by:
mixing titanium dioxide, nano-alumina and ethanol uniformly, adding antibacterial modified polytetrafluoroethylene, soaking at room temperature for 8-10h, and drying.
7. The antibacterial color steel plate of claim 1, wherein the rubber elasticity is one or both of SBS and SEBS.
8. The antibacterial color steel plate as claimed in claim 1, wherein the curing agent is selected from one or more of hydroxyalkyl amide HAA, triglycidyl isocyanurate and hydroxyalkyl amide;
the filler is selected from one or more of kaolin, mica powder, calcium carbonate and talcum powder.
9. The process for producing an antibacterial colored steel sheet according to any one of claims 1 to 8, characterized by comprising the steps of:
plasma treatment: degreasing a metal base material, washing with water, drying, and performing plasma treatment on the surface of the metal base material by using plasma equipment at room temperature to form a plasma layer;
preparing a primer layer: coating primer on the metal substrate after plasma treatment, and drying to form a primer layer;
preparing a finish paint layer: and spraying finish paint on the primer layer of the metal substrate, heating to 200-210 ℃, baking for 10-15min, and cooling to form a finish paint layer.
10. The process for producing an antibacterial colored steel plate according to claim 9, wherein the thickness of the primer layer is 4 to 6 μm, the thickness of the finish layer is 8 to 12 μm, and the plasma treatment constant thickness is 50 to 500nm.
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| CN202210775709.3A CN115141536A (en) | 2022-07-01 | 2022-07-01 | Antibacterial colorful steel plate and production process thereof |
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| CN202210775709.3A CN115141536A (en) | 2022-07-01 | 2022-07-01 | Antibacterial colorful steel plate and production process thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002087339A1 (en) * | 2001-04-30 | 2002-11-07 | Ak Properties, Inc. | Antimicrobial powder coated metal sheet |
| CN111675955A (en) * | 2020-05-07 | 2020-09-18 | 合肥河钢新材料科技有限公司 | Antibacterial varnish for color plate and color plate production process |
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- 2022-07-01 CN CN202210775709.3A patent/CN115141536A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002087339A1 (en) * | 2001-04-30 | 2002-11-07 | Ak Properties, Inc. | Antimicrobial powder coated metal sheet |
| CN111675955A (en) * | 2020-05-07 | 2020-09-18 | 合肥河钢新材料科技有限公司 | Antibacterial varnish for color plate and color plate production process |
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Application publication date: 20221004 |