CN117050612B - Corrosion-resistant composite aluminum foil for food packaging and processing technology thereof - Google Patents
Corrosion-resistant composite aluminum foil for food packaging and processing technology thereof Download PDFInfo
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- CN117050612B CN117050612B CN202311317782.7A CN202311317782A CN117050612B CN 117050612 B CN117050612 B CN 117050612B CN 202311317782 A CN202311317782 A CN 202311317782A CN 117050612 B CN117050612 B CN 117050612B
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- Prior art keywords
- coating
- parts
- aluminum foil
- stirring
- emulsion
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 69
- 239000011888 foil Substances 0.000 title claims abstract description 69
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 238000005260 corrosion Methods 0.000 title claims abstract description 41
- 230000007797 corrosion Effects 0.000 title claims abstract description 41
- 235000013305 food Nutrition 0.000 title claims abstract description 27
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 title claims abstract description 21
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 145
- 239000011248 coating agent Substances 0.000 claims abstract description 143
- 239000000839 emulsion Substances 0.000 claims abstract description 67
- 238000003756 stirring Methods 0.000 claims abstract description 66
- 238000001035 drying Methods 0.000 claims abstract description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000003822 epoxy resin Substances 0.000 claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 22
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000011258 core-shell material Substances 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 10
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 24
- 239000008367 deionised water Substances 0.000 claims description 21
- 229910021641 deionized water Inorganic materials 0.000 claims description 21
- 239000007864 aqueous solution Substances 0.000 claims description 18
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 17
- 239000003094 microcapsule Substances 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 14
- VVAKEQGKZNKUSU-UHFFFAOYSA-N 2,3-dimethylaniline Chemical compound CC1=CC=CC(N)=C1C VVAKEQGKZNKUSU-UHFFFAOYSA-N 0.000 claims description 13
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 13
- 229920000767 polyaniline Polymers 0.000 claims description 13
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 13
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 11
- 239000012964 benzotriazole Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims description 9
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000000178 monomer Substances 0.000 claims description 9
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 8
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 7
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 claims description 7
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 claims description 7
- 239000008158 vegetable oil Substances 0.000 claims description 7
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 6
- 150000001448 anilines Chemical class 0.000 claims description 6
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- VOWZNBNDMFLQGM-UHFFFAOYSA-N 2,5-dimethylaniline Chemical compound CC1=CC=C(C)C(N)=C1 VOWZNBNDMFLQGM-UHFFFAOYSA-N 0.000 claims description 4
- MLPVBIWIRCKMJV-UHFFFAOYSA-N 2-ethylaniline Chemical compound CCC1=CC=CC=C1N MLPVBIWIRCKMJV-UHFFFAOYSA-N 0.000 claims description 4
- 235000009434 Actinidia chinensis Nutrition 0.000 claims description 4
- 244000298697 Actinidia deliciosa Species 0.000 claims description 4
- 235000009436 Actinidia deliciosa Nutrition 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- 235000019198 oils Nutrition 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000002390 rotary evaporation Methods 0.000 claims description 3
- ULHFFAFDSSHFDA-UHFFFAOYSA-N 1-amino-2-ethoxybenzene Chemical compound CCOC1=CC=CC=C1N ULHFFAFDSSHFDA-UHFFFAOYSA-N 0.000 claims description 2
- 241000208688 Eucommia Species 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 235000020235 chia seed Nutrition 0.000 claims description 2
- 239000001335 perilla frutescens leaf extract Substances 0.000 claims description 2
- 235000019871 vegetable fat Nutrition 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- -1 2, 3-dimethylaniline benzene ring Chemical group 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000004982 aromatic amines Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000009878 intermolecular interaction Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000002077 nanosphere Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
-
- 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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/08—Anti-corrosive paints
-
- 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
- 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
- C09D7/65—Additives macromolecular
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
-
- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Plant Pathology (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of medium-composite aluminum foils, and discloses a corrosion-resistant composite aluminum foil for food packaging and a processing technology thereof; the method comprises the following steps: adding solvent type nano titanium dioxide and mesoporous silicon dioxide coated nano silver particles into fluorocarbon emulsion, stirring and grinding to obtain a coating A; adding the functional nano core-shell material into the aqueous epoxy resin emulsion, uniformly stirring, adding the curing agent, and uniformly stirring to obtain a coating B; adding the functional composite emulsion into the fluorocarbon emulsion, and uniformly stirring to obtain a coating C; coating the coating A on the upper surface of an aluminum foil, and drying to obtain a coating A; coating the coating B on the lower surface of the aluminum foil, and drying to obtain a coating B; coating the coating C on the surface of the coating B, and drying to obtain a coating C; and drying the aluminum foil, cooling and rolling to obtain the composite aluminum foil.
Description
Technical Field
The invention relates to the technical field of composite aluminum foils, in particular to a corrosion-resistant composite aluminum foil for food packaging and a processing technology thereof.
Background
Along with the improvement of living standard and the continuous progress of science and technology, the requirements of people on food are more and more diversified, sanitary and high-grade, and the composite aluminum foil is used as a material for food packaging, has good mechanical property, heat resistance, barrier property and the like, has stable chemical property, can not chemically react with components in the food, and can not generate substances harmful to human bodies; however, there is little attention paid to the corrosion resistance of aluminum foils, and in some specific severe environments, such as army operations, dark and humid environments, the composite aluminum foil is required to have not only antibacterial properties, but also resistance to attack by external corrosive substances.
Therefore, the corrosion-resistant composite aluminum foil for food packaging has important significance.
Disclosure of Invention
The invention aims to provide a corrosion-resistant composite aluminum foil for food packaging and a processing technology thereof, which are used for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
a processing technology of corrosion-resistant composite aluminum foil for food packaging comprises the following steps:
s1: dissolving dodecylbenzene sulfonic acid in deionized water, adding an aniline derivative, stirring for 30-45min, adding nano aluminum oxide powder and functional microcapsules, stirring for 30-45min, adding an ammonium persulfate aqueous solution, stirring for reaction for 12-14h, demulsifying, suction filtering, washing and drying to obtain a functional composite emulsion;
s2: dispersing nano titanium nitride in deionized water, regulating pH to 11-12, adding benzotriazole and hexadecyl trimethyl ammonium bromide, stirring at 80-85 ℃ for 30-45min, adding tetraethoxysilane, continuing stirring and reacting for 2-3h, centrifuging, washing and drying to obtain a functional nano core-shell material;
s3: dissolving sodium dodecyl sulfonate in deionized water, adding fluorocarbon monomer, methacrylic acid and methyl methacrylate, and uniformly mixing to obtain mixed emulsion; uniformly mixing sodium dodecyl sulfonate, sodium bicarbonate and deionized water, heating to 85-90 ℃, adding ammonium persulfate aqueous solution and mixed emulsion, reacting for 1-2h under heat preservation, and cooling to obtain fluorocarbon emulsion;
s4: adding solvent type nano titanium dioxide and mesoporous silicon dioxide coated nano silver particles into aqueous epoxy resin emulsion, stirring and grinding, adding a curing agent, and uniformly stirring to obtain a coating A; adding the functional nano core-shell material and polyaniline powder into the aqueous epoxy resin emulsion, uniformly stirring, adding a curing agent, and uniformly stirring to obtain a coating B; adding the functional composite emulsion into the fluorocarbon emulsion, and uniformly stirring to obtain a coating C; coating the coating A on the upper surface of an aluminum foil, and drying to obtain a coating A; coating the coating B on the lower surface of the aluminum foil, and drying to obtain a coating B; coating the coating C on the surface of the coating B, and drying to obtain a coating C; and drying the aluminum foil, cooling and rolling to obtain the composite aluminum foil.
Further, the preparation method of the functional microcapsule comprises the following steps: uniformly mixing epoxy acrylate, vegetable fat, methylene dichloride and 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, adding the mixture into a polyvinyl alcohol water solution with the concentration of 1-2wt%, stirring at 40-45 ℃ for 12-14 hours, removing the methylene dichloride by rotary evaporation, adding a sodium styrenesulfonate water solution with the concentration of 10-12wt%, stirring for 30-45 minutes, ultraviolet curing for 20-30 minutes, washing and drying to obtain the functional microcapsule.
Further, the epoxy acrylate: vegetable oil: dichloromethane: 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide: the mass ratio of the sodium styrenesulfonate aqueous solution is (4.5-5)/(15-20)/(1-1.5)/(12-15).
Further, the vegetable oil is one or more of perilla seed oil, kiwi seed oil, eucommia seed oil and chia seed oil.
Further, the functional composite emulsion comprises, by mass, 27-36 parts of dodecylbenzenesulfonic acid, 15-20 parts of aniline derivatives, 37.5-50 parts of nano alumina powder, 37.5-50 parts of functional microcapsules and 45-60 parts of ammonium persulfate solution.
Further, the aniline derivative is any one of 2, 3-dimethylaniline, o-ethoxyaniline, o-ethylaniline and 2, 5-dimethylaniline.
Further, the concentration of the ammonium persulfate aqueous solution is 3.5-4g/mL.
Further, the functional nanometer core-shell material comprises, by mass, 10-15 parts of nanometer titanium nitride, 40-60 parts of benzotriazole, 25-37.5 parts of cetyl trimethyl ammonium bromide and 125-187.5 parts of tetraethoxysilane.
Further, the mixed emulsion comprises, by mass, 18-20 parts of sodium dodecyl sulfate, 60-80 parts of fluorocarbon monomer, 8-10 parts of methacrylic acid, 60-80 parts of methyl methacrylate and 70-90 parts of deionized water.
Further, the fluorocarbon emulsion comprises, by mass, 12-15 parts of sodium dodecyl sulfate, 1-2 parts of sodium bicarbonate, 7-8 parts of ammonium persulfate aqueous solution, 200-220 parts of mixed emulsion and 80-100 parts of deionized water; the concentration of the ammonium persulfate aqueous solution is 0.02-0.03g/mL.
Further, the preparation method of the mesoporous silica coated nano silver particles comprises the following steps: dissolving cetyl trimethyl ammonium bromide in deionized water, regulating pH to 11-12, adding silver sol with concentration of 6-7mg/mL, stirring at 80-85 ℃ for 30-45min, adding ethyl orthosilicate, continuing stirring for 2-3h, centrifuging, washing, purifying, and drying to obtain mesoporous silica coated nano silver particles; wherein the raw materials of each component comprise, by mass, 4-5 parts of cetyl trimethyl ammonium bromide, 20-30 parts of silver sol and 20-30 parts of tetraethoxysilane.
Further, in the coating A, the raw materials of the components comprise, by mass, 15-20 parts of solvent-type nano titanium dioxide, 10-15 parts of mesoporous silica coated nano silver particles, 50-60 parts of aqueous epoxy resin emulsion and 12-15 parts of curing agent.
Further, in the coating B, the raw materials of the components comprise, by mass, 5-10 parts of functional nano core-shell materials, 4-5 parts of polyaniline powder, 90-95 parts of aqueous epoxy resin emulsion and 22.5-25 parts of curing agents.
Further, the curing agent is an aromatic amine curing agent.
Further, in the coating C, the raw materials of the components account for 25-50 parts by weight of functional composite emulsion and 50-75 parts by weight of fluorocarbon emulsion; .
Further, the coating A has a coating weight of 2-4g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The coating weight of the coating B is 4-6g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The coating amount of the coating C is 7-8g/m 2 。
Compared with the prior art, the invention has the following beneficial effects:
the invention takes vegetable oil as a core and sodium styrene sulfonate and epoxy acrylate copolymer as a shell to prepare the functional sulfonated microcapsule with self-repairing function; then, using functional sulfonated microcapsule and nano alumina as carrier, using sodium dodecyl benzene sulfonate as emulsifier and doping agent, using 2, 3-dimethylaniline as monomer, under the action of ammonium persulfate aqueous solution, successfully preparing sodium dodecyl benzene sulfonate doped poly-2, 3-dimethylaniline, and loading on the surfaces of functional sulfonated microcapsule and nano alumina, so as to prepare the functional composite emulsion.
Polyaniline is used as a corrosion-resistant material, and has a large number of benzene ring structures in the molecular chain, so that the skeleton has strong rigidity and large intermolecular acting force, so that the polyaniline has poor solubility and is difficult to be applied to practical production and application. According to the invention, two methyl groups on the same side of a benzene ring in a chain segment structure after 2, 3-dimethylaniline polymerization are utilized, so that the steric hindrance between molecular chains is reduced, the rigidity of a molecular chain skeleton and the intermolecular interaction force are reduced, and the solubility of the polymer in a resin matrix is greatly enhanced; meanwhile, the purpose of selecting sodium dodecyl benzene sulfonate as an emulsifier and a doping agent is achieved, on one hand, the preparation process can be simplified in an emulsion polymerization mode, precipitation separation is not needed in the process of taking out the solvent, meanwhile, the polymerization rate of a reaction system is improved, the reaction time is shortened, and the production cost is reduced; on the other hand, dodecylbenzenesulfonic acid is doped in the molecular structure of poly-2, 3-dimethylaniline, between benzene rings, further improving its solubility in the resin matrix. The doped modified poly (2, 3-dimethylaniline) is loaded on the surfaces of the functional sulfonated microcapsules and the nano alumina, so that the effect of improving the solubility and the dispersibility is achieved; in the reaction process of the system, the sodium dodecyl benzene sulfonate and the functional sulfonated microcapsule can enhance the dispersion performance of nano alumina in 2, 3-dimethylaniline, avoid the occurrence of agglomeration phenomenon, ensure that the whole reaction rate is uniform and synchronous, and greatly improve the loading efficiency of the polymer.
The invention takes titanium nitride-mesoporous silica as a core-shell nano container, loads benzotriazole corrosion inhibitor into the container, and prepares the functional nano core-shell material; then adding the aqueous epoxy resin emulsion together with polyaniline powder and a curing agent to prepare a coating B; coating the aluminum foil as an inner layer of a corrosion-resistant layer formed by a coating B and a coating C on the surface of the aluminum foil; the core-shell nano container composed of titanium nitride and mesoporous silica has strong photo-thermal conversion effect and the photo-thermal effect of polyaniline are cooperated, when the coating is damaged, benzotriazole can be promoted to be released into cracks, the purpose of inhibiting corrosion activity is achieved, meanwhile, the shape memory effect of damaged epoxy resin can be triggered, the damaged part of the coating is repaired, and the self-repairing corrosion resistance is achieved.
The invention prepares aqueous fluorocarbon emulsion by copolymerizing fluorocarbon monomer, methacrylic acid and methyl methacrylate, and then blends the prepared functional composite emulsion with the aqueous fluorocarbon emulsion to prepare coating C; the aqueous fluorocarbon emulsion prepared from fluorocarbon monomers and acrylic esters has poor film forming property and poor bonding property with aluminum foil, and the adhesive force of the coating C can be greatly improved when the aqueous fluorocarbon emulsion is used as a second layer for coating; (2) when the wear-resistant layer is damaged, vegetable oil in the coating C is released to react with oxygen in the air to repair the damaged part, but the repair process is slow, and the corrosion resistance of the aluminum foil exposed at the damaged part is reduced in the process, so that benzotriazole released in the inner coating B quickly reaches the surface of the aluminum foil at the damaged part to achieve the effect of inhibiting corrosion, then the damaged part is repaired under the action of photo-thermal effect, and finally the remaining micro cracks are continuously filled and repaired by the vegetable oil to generate a double action mechanism of 'sealing protection' and 'sealing protection', so that the corrosion resistance of the coating is recovered; (3) the high bond energy of the C-F bond is utilized to improve the stability of the molecular structure, protect the C-C bond from external attack, and provide the corrosion-resistant layer with the performances of oil resistance, water resistance, self cleaning, oxidation resistance, illumination resistance, radiation resistance and the like. Paint B and paint C cooperate to form a corrosion-resistant layer with self-repairing capability on the surface of the aluminum foil.
In the coating C, as two methyl groups on the same side of the 2, 3-dimethylaniline benzene ring influence the arrangement of molecular chains in the polymerization process, the molecular structure of the prepared poly-2, 3-dimethylaniline is in a nano sphere shape, and the molecular structure of polyaniline in the coating B is in a nano linear shape, the dispersion performance of the contact surface of the coating B and the coating C is enhanced in the coating process.
The invention adds solvent type nanometer titanium dioxide and mesoporous silicon dioxide coated nanometer silver particles into aqueous epoxy resin emulsion to prepare a coating with antibacterial function, and coats the coating with the surface of aluminum foil to form a protective layer with antibacterial property; finally, the composite aluminum foil with the outer layer having corrosion resistance and the inner layer having antibacterial performance for food packaging is prepared.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples, the epoxy acrylate unsaturated double bond content was 10.4%; the kiwi seed oil is provided by a green source natural perfume oil extraction refinery in Qingyuan area of Jian city through supercritical CO 2 Extracting to obtain the final product; dichloromethane CAS:75-09-2;2,4, 6-trimethylbenzoyl diphenyl phosphine oxide CAS:75980-60-8; the polyvinyl alcohol model is PVA1788, and is purchased from national medicine group chemical reagent company; sodium styrenesulfonate CAS:2695-37-6; dodecylbenzenesulfonic acid CAS:27176-87-0;2, 3-dimethylaniline CAS:87-59-2; the grain diameter of the nano alumina powder is 20nm; ammonium persulfate CAS:7727-54-0; nano titanium nitride was purchased from Sigma-Aldrich Sigma Aldrich (Shanghai) trade limited; benzotriazole CAS:95-14-7; ethyl orthosilicate CAS:78-10-4; the fluorocarbon monomer is purchased from Harbin Xuejia fluorocarbon chemical Co., ltd, and the model is G03; methacrylic acid was purchased from katong chemical company, tianjin; methyl methacrylate was purchased from the doctor chemical company, tianjin; sodium bicarbonate CAS:144-55-8; the model of the aqueous epoxy resin emulsion is LLA-10, the model of the curing agent is LLG-119, and the aqueous epoxy resin emulsion is purchased from the technical research center of corrosion-resistant and fire-resistant engineering of Jiangsu Lanling steel structures.
The preparation method of the functional nano core-shell material comprises the following steps: dispersing 10g of nano titanium nitride in 200mL of deionized water, adding sodium hydroxide to adjust the pH to 12, adding 40g of benzotriazole and 25g of hexadecyl trimethyl ammonium bromide, stirring at 80 ℃ for 30min, adding 125g of tetraethoxysilane, continuing stirring and reacting for 2h, centrifuging, washing and drying to obtain a functional nano core-shell material;
the preparation method of the mesoporous silica coated nano silver particles comprises the following steps: dissolving 4g of cetyl trimethyl ammonium bromide in 150mL of deionized water, adding sodium hydroxide to adjust the pH to 12, adding 20g of silver sol with the concentration of 6mg/mL, stirring at 80 ℃ for 30min, adding 20g of ethyl orthosilicate, continuing stirring and reacting for 2h, centrifuging, washing, purifying and drying to obtain mesoporous silica coated nano silver particles.
Example 1: a processing technology of corrosion-resistant composite aluminum foil for food packaging comprises the following steps: s1: uniformly mixing 4.5g of epoxy acrylate, 4.5g of kiwi seed oil, 15g of dichloromethane and 1g of 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, adding into 50mL of 1wt% concentration polyvinyl alcohol aqueous solution, stirring for 12 hours at 40 ℃, removing the dichloromethane by rotary evaporation, adding 12g of 10wt% concentration sodium styrenesulfonate aqueous solution, stirring for 30 minutes, ultraviolet curing for 20 minutes, washing and drying to obtain functional microcapsules;
s2: dissolving 27g of dodecylbenzene sulfonic acid in deionized water, adding 15g of 2, 3-dimethylaniline, stirring for 30min, adding 37.5g of nano alumina powder and 37.5g of functional microcapsules, stirring for 30min, adding 45g of ammonium persulfate aqueous solution with the concentration of 3.5g/mL, stirring for reacting for 12h, demulsifying, filtering, washing and drying to obtain functional composite emulsion;
s3: dissolving 18g of sodium dodecyl sulfate in 90g of deionized water, adding 60g of fluorocarbon monomer, 8g of methacrylic acid and 60g of methyl methacrylate, and uniformly mixing to obtain mixed emulsion; uniformly mixing 12g of sodium dodecyl sulfate, 1g of sodium bicarbonate and 100g of deionized water, heating to 85 ℃, adding 7g of ammonium persulfate aqueous solution with the concentration of 0.02g/mL and 200g of mixed emulsion, reacting for 1h under heat preservation, and cooling to obtain fluorocarbon emulsion;
s4: adding 15g of solvent type nano titanium dioxide and 10g of mesoporous silica coated nano silver particles into 60g of aqueous epoxy resin emulsion, stirring and grinding, adding 15g of curing agent, and stirring uniformly to obtain a coating A; adding 5g of functional nano core-shell material and 4g of polyaniline powder into 95g of aqueous epoxy resin emulsion, uniformly stirring, adding 25g of curing agent, and uniformly stirring to obtain a coating B; adding 25g of the functional composite emulsion into 75g of fluorocarbon emulsion, and uniformly stirring to obtain a coating C; coating the coating A on the upper surface of an aluminum foil, and drying to obtain a coating A; coating the coating B on the lower surface of the aluminum foil, and drying to obtain a coating B; coating the coating C on the surface of the coating B, and drying to obtain a coating C; drying the aluminum foil, cooling and rolling to obtain a composite aluminum foil;
coating A coating weight of 2g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The coating weight of the coating B is 4g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The coating amount of the coating C is 7g/m 2 。
Example 2: a processing technology of corrosion-resistant composite aluminum foil for food packaging comprises the following steps: s4: adding 18g of solvent type nano titanium dioxide and 13g of mesoporous silica coated nano silver particles into 60g of aqueous epoxy resin emulsion, stirring and grinding, adding 15g of curing agent, and stirring uniformly to obtain a coating A; adding 8g of functional nano core-shell material and 4g of polyaniline powder into 95g of aqueous epoxy resin emulsion, uniformly stirring, adding 25g of curing agent, and uniformly stirring to obtain a coating B; adding 40g of the functional composite emulsion into 60g of fluorocarbon emulsion, and uniformly stirring to obtain a coating C; coating the coating A on the upper surface of an aluminum foil, and drying to obtain a coating A; coating the coating B on the lower surface of the aluminum foil, and drying to obtain a coating B; coating the coating C on the surface of the coating B, and drying to obtain a coating C; drying the aluminum foil, cooling and rolling to obtain a composite aluminum foil;
the remaining steps were the same as in example 1.
Example 3: a processing technology of corrosion-resistant composite aluminum foil for food packaging comprises the following steps: s4: adding 20g of solvent type nano titanium dioxide and 15g of mesoporous silica coated nano silver particles into 60g of aqueous epoxy resin emulsion, stirring and grinding, adding 15g of curing agent, and stirring uniformly to obtain a coating A; adding 10g of functional nano core-shell material and 5g of polyaniline powder into 95g of aqueous epoxy resin emulsion, uniformly stirring, adding 25g of curing agent, and uniformly stirring to obtain a coating B; adding 50g of the functional composite emulsion into 50g of fluorocarbon emulsion, and uniformly stirring to obtain a coating C; coating the coating A on the upper surface of an aluminum foil, and drying to obtain a coating A; coating the coating B on the lower surface of the aluminum foil, and drying to obtain a coating B; coating the coating C on the surface of the coating B, and drying to obtain a coating C; drying the aluminum foil, cooling and rolling to obtain a composite aluminum foil;
the remaining steps were the same as in example 1.
Comparative example 1: a processing technology of corrosion-resistant composite aluminum foil for food packaging comprises the following steps: s4: adding 15g of solvent type nano titanium dioxide and 10g of mesoporous silica coated nano silver particles into 60g of aqueous epoxy resin emulsion, stirring and grinding, adding 15g of curing agent, and stirring uniformly to obtain a coating A; adding 5g of functional nano core-shell material and 4g of polyaniline powder into 95g of aqueous epoxy resin emulsion, uniformly stirring, adding 25g of curing agent, and uniformly stirring to obtain a coating B; adding 25g of the functional composite emulsion into 75g of fluorocarbon emulsion, and uniformly stirring to obtain a coating C; coating the coating A on the upper surface of an aluminum foil, and drying to obtain a coating A; coating the coating C on the lower surface of the aluminum foil, and drying to obtain a coating B; coating the coating B on the surface of the coating B, and drying to obtain a coating C; drying the aluminum foil, cooling and rolling to obtain a composite aluminum foil;
the remaining steps were the same as in example 1.
Comparative example 2: a processing technology of corrosion-resistant composite aluminum foil for food packaging comprises the following steps: the preparation method of the functional nano core-shell material comprises the following steps: dispersing 25g of hexadecyl trimethyl ammonium bromide in 200mL of deionized water, adding sodium hydroxide to adjust the pH to 12, adding 40g of benzotriazole, stirring for 30min at 80 ℃, adding 125g of ethyl orthosilicate, continuing stirring for reacting for 2h, centrifuging, washing and drying to obtain a functional nano core-shell material;
the remaining steps were the same as in example 1.
Comparative example 3: a processing technology of corrosion-resistant composite aluminum foil for food packaging comprises the following steps: s2: dissolving 27g of dodecylbenzene sulfonic acid in deionized water, adding 15g of aniline, stirring for 30min, adding 37.5g of nano alumina powder and 37.5g of functional microcapsules, stirring for 30min, adding 45g of ammonium persulfate aqueous solution with the concentration of 3.5g/mL, stirring and reacting for 12h, demulsifying, filtering, washing and drying to obtain functional composite emulsion;
the remaining steps were the same as in example 1.
And (3) testing: adhesive force performance: according to GB/T9286-2021, a cross-cut method is used for carrying out adhesive force test on a corrosion-resistant layer formed by the coating B and the coating C;
salt spray test: setting the temperature of a salt spray experiment box to 40 ℃, setting the humidity to 120%, carrying out salt spray experiment on a hydrochloric acid solution with the concentration of 5wt%, observing the corrosion-resistant coating formed by the coating B and the coating C every 6 hours until the corrosion-resistant coating is slightly corroded, and recording the salt spray resistance time; using an art knife to scratch the corrosion resistant layer formed by the coating B and the coating C with a mechanical scratch with the width of about 30 mu m; these damaged coatings were then subjected to a near infrared laser (wavelength 980nm, light intensity 8W/cm) 2 ) Irradiating for 3s, standing for 300min, repeating the salt spray test again, placing in salt spray for 120h, and observing corrosion condition at the scratch.
Table 1 test of composite aluminum foil performance
Conclusion: the composite aluminum foils prepared in examples 1-3 have excellent corrosion resistance. In comparative example 1, the coating B raw material and the coating C raw material were exchanged, resulting in a decrease in each performance of the composite aluminum foil; in comparative example 2, only mesoporous silica is used for loading benzotriazole, and the photo-thermal conversion effect provided by titanium nitride is absent, so that the evaluation of a scratch salt spray test is poor, and the self-repairing performance of the composite aluminum foil is reduced; in comparative example 3, aniline was used instead of 2, 3-dimethylaniline, resulting in a decrease in solubility and dispersibility, resulting in a decrease in each property of the composite aluminum foil.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A processing technology of corrosion-resistant composite aluminum foil for food packaging is characterized in that: the method comprises the following steps:
s1: dissolving dodecylbenzene sulfonic acid in deionized water, adding an aniline derivative, stirring for 30-45min, adding nano aluminum oxide powder and functional microcapsules, stirring for 30-45min, adding an ammonium persulfate aqueous solution, stirring for reaction for 12-14h, demulsifying, suction filtering, washing and drying to obtain a functional composite emulsion;
s2: dispersing nano titanium nitride in deionized water, regulating pH to 11-12, adding benzotriazole and hexadecyl trimethyl ammonium bromide, stirring at 80-85 ℃ for 30-45min, adding tetraethoxysilane, continuing stirring and reacting for 2-3h, centrifuging, washing and drying to obtain a functional nano core-shell material;
s3: dissolving sodium dodecyl sulfonate in deionized water, adding fluorocarbon monomer, methacrylic acid and methyl methacrylate, and uniformly mixing to obtain mixed emulsion; uniformly mixing sodium dodecyl sulfonate, sodium bicarbonate and deionized water, heating to 85-90 ℃, adding ammonium persulfate aqueous solution and mixed emulsion, reacting for 1-2h under heat preservation, and cooling to obtain fluorocarbon emulsion;
s4: adding solvent type nano titanium dioxide and mesoporous silicon dioxide coated nano silver particles into aqueous epoxy resin emulsion, stirring and grinding, adding a curing agent, and stirring uniformly to obtain a coating A; adding the functional nano core-shell material and polyaniline powder into the aqueous epoxy resin emulsion, uniformly stirring, adding a curing agent, and uniformly stirring to obtain a coating B; adding the functional composite emulsion into the fluorocarbon emulsion, and uniformly stirring to obtain a coating C; coating the coating A on the upper surface of an aluminum foil, and drying to obtain a coating A; coating the coating B on the lower surface of the aluminum foil, and drying to obtain a coating B; coating the coating C on the surface of the coating B, and drying to obtain a coating C; drying the aluminum foil, cooling and rolling to obtain a composite aluminum foil;
the preparation method of the functional microcapsule comprises the following steps: uniformly mixing epoxy acrylate, vegetable fat, methylene dichloride and 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, adding the mixture into a polyvinyl alcohol water solution with the concentration of 1-2wt%, stirring at 40-45 ℃ for 12-14 hours, removing the methylene dichloride by rotary evaporation, adding a sodium styrenesulfonate water solution with the concentration of 10-12wt%, stirring for 30-45 minutes, ultraviolet curing for 20-30 minutes, washing and drying to obtain the functional microcapsule.
2. The process for processing the corrosion-resistant composite aluminum foil for food packaging according to claim 1, wherein the process comprises the following steps of: the epoxy acrylate: vegetable oil: dichloromethane: 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide: the mass ratio of the sodium styrenesulfonate aqueous solution is (4.5-5): 15-20): 1-1.5): 12-15; the vegetable oil is one or more of perilla seed oil, kiwi seed oil, eucommia seed oil and chia seed oil.
3. The process for processing the corrosion-resistant composite aluminum foil for food packaging according to claim 1, wherein the process comprises the following steps of: the functional composite emulsion comprises, by mass, 27-36 parts of dodecylbenzenesulfonic acid, 15-20 parts of aniline derivatives, 37.5-50 parts of nano alumina powder, 37.5-50 parts of functional microcapsules and 45-60 parts of ammonium persulfate solution; the aniline derivative is any one of 2, 3-dimethylaniline, o-ethoxyaniline, o-ethylaniline and 2, 5-dimethylaniline; the concentration of the ammonium persulfate aqueous solution is 3.5-4g/mL.
4. The process for processing the corrosion-resistant composite aluminum foil for food packaging according to claim 1, wherein the process comprises the following steps of: the functional nanometer core-shell material comprises, by mass, 10-15 parts of nanometer titanium nitride, 40-60 parts of benzotriazole, 25-37.5 parts of cetyl trimethyl ammonium bromide and 125-187.5 parts of tetraethoxysilane.
5. The process for processing the corrosion-resistant composite aluminum foil for food packaging according to claim 1, wherein the process comprises the following steps of: the mixed emulsion comprises, by mass, 18-20 parts of sodium dodecyl sulfate, 60-80 parts of fluorocarbon monomer, 8-10 parts of methacrylic acid, 60-80 parts of methyl methacrylate and 70-90 parts of deionized water; the fluorocarbon emulsion comprises, by mass, 12-15 parts of sodium dodecyl sulfate, 1-2 parts of sodium bicarbonate, 7-8 parts of ammonium persulfate aqueous solution, 200-220 parts of mixed emulsion and 80-100 parts of deionized water; the concentration of the ammonium persulfate aqueous solution is 0.02-0.03g/mL.
6. The process for processing the corrosion-resistant composite aluminum foil for food packaging according to claim 1, wherein the process comprises the following steps of: the preparation method of the mesoporous silica coated nano silver particles comprises the following steps: dissolving cetyl trimethyl ammonium bromide in deionized water, regulating pH to 11-12, adding silver sol with concentration of 6-7mg/mL, stirring at 80-85 ℃ for 30-45min, adding ethyl orthosilicate, continuing stirring for 2-3h, centrifuging, washing, purifying, and drying to obtain mesoporous silica coated nano silver particles; wherein the raw materials of each component comprise, by mass, 4-5 parts of cetyl trimethyl ammonium bromide, 20-30 parts of silver sol and 20-30 parts of tetraethoxysilane.
7. The process for processing the corrosion-resistant composite aluminum foil for food packaging according to claim 1, wherein the process comprises the following steps of: the coating A comprises the following raw materials in parts by weight, 15-20 parts of solvent type nano titanium dioxide, 10-15 parts of mesoporous silica coated nano silver particles, 50-60 parts of aqueous epoxy resin emulsion and 12-15 parts of curing agent;
the coating B comprises the following raw materials in parts by weight, 5-10 parts of functional nano core-shell material, 4-5 parts of polyaniline powder, 90-95 parts of aqueous epoxy resin emulsion and 22.5-25 parts of curing agent;
the coating C comprises the following raw materials in parts by weight, 25-50 parts of functional composite emulsion and 50-75 parts of fluorocarbon emulsion.
8. The process for processing the corrosion-resistant composite aluminum foil for food packaging according to claim 1, wherein the process comprises the following steps of: the saidThe coating A has a coating weight of 2-4g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The coating weight of the coating B is 4-6g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The coating amount of the coating C is 7-8g/m 2 。
9. The composite aluminum foil for food packaging prepared by the processing technology of the corrosion-resistant composite aluminum foil for food packaging according to any one of claims 1 to 8.
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| CN110713648A (en) * | 2018-07-13 | 2020-01-21 | 杭州星庐科技有限公司 | Anti-aging polar rubber composition, and processing method and application thereof |
| CN112143223A (en) * | 2020-09-25 | 2020-12-29 | 上海化工研究院有限公司 | Low-toxicity low-smoke halogen-free flame-retardant high-temperature-resistant nylon material and preparation method and application thereof |
| CN115505332A (en) * | 2022-08-30 | 2022-12-23 | 江南大学 | Self-repairing anticorrosive coating containing polyaniline double-layer microcapsule |
| CN115532185A (en) * | 2022-08-30 | 2022-12-30 | 江南大学 | Polyaniline double-layer microcapsule with barrier property |
| CN116285442A (en) * | 2023-03-31 | 2023-06-23 | 武汉理工大学 | Carbon-negative and self-temperature-regulating thermochromic coating as well as preparation method and application thereof |
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