CN115746657A - Powder coating containing photocatalyst and preparation method thereof - Google Patents
Powder coating containing photocatalyst and preparation method thereof Download PDFInfo
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- CN115746657A CN115746657A CN202211326345.7A CN202211326345A CN115746657A CN 115746657 A CN115746657 A CN 115746657A CN 202211326345 A CN202211326345 A CN 202211326345A CN 115746657 A CN115746657 A CN 115746657A
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 57
- 239000000843 powder Substances 0.000 title claims abstract description 57
- 239000011248 coating agent Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 34
- 239000002131 composite material Substances 0.000 claims abstract description 26
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 11
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 8
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 8
- 239000004593 Epoxy Substances 0.000 claims abstract description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003822 epoxy resin Substances 0.000 claims abstract description 8
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 8
- 229920001225 polyester resin Polymers 0.000 claims abstract description 8
- 239000004645 polyester resin Substances 0.000 claims abstract description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 8
- YJVLWFXZVBOFRZ-UHFFFAOYSA-N titanium zinc Chemical compound [Ti].[Zn] YJVLWFXZVBOFRZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 229920002050 silicone resin Polymers 0.000 claims abstract description 5
- 238000013329 compounding Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 25
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- BSKHPKMHTQYZBB-UHFFFAOYSA-N 2-methylpyridine Chemical compound CC1=CC=CC=N1 BSKHPKMHTQYZBB-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- -1 N-iodopropargyloxycarbonylamino Chemical group 0.000 claims description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000010428 baryte Substances 0.000 claims description 3
- 229910052601 baryte Inorganic materials 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 claims description 3
- FJOLTQXXWSRAIX-UHFFFAOYSA-K silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 claims description 3
- 229940019931 silver phosphate Drugs 0.000 claims description 3
- 229910000161 silver phosphate Inorganic materials 0.000 claims description 3
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims 1
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 18
- 230000003197 catalytic effect Effects 0.000 abstract description 5
- 230000004048 modification Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 5
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 230000001699 photocatalysis Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000007405 data analysis Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000000593 degrading effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 241000700605 Viruses Species 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000004599 antimicrobial Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009396 hybridization Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 150000004714 phosphonium salts Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a powder coating containing a photocatalyst, which comprises the following preparation raw materials: hyperbranched epoxy resin, carboxyl-terminated polyester resin, silicone resin, epoxy modified acrylic resin, a composite antibacterial agent, an antioxidant, modified photocatalyst powder, a composite filler and modified PTFE wax; the powder coating can be endowed with excellent antibacterial performance by compounding the organic antibacterial agent and the inorganic antibacterial agent; the modified photocatalyst is prepared by mixing nitrogen-doped titanium dioxide, iron-doped titanium dioxide and zinc-doped titanium dioxide in a specific ratio and then carrying out modification treatment, so that the surface-modified photocatalyst material is obtained, and further has excellent dispersibility in a powder coating system, has remarkable catalytic effect and antibacterial effect, can degrade formaldehyde, and reduces potential harm of organic matters to indoor environment and human body.
Description
Technical Field
The invention relates to the field of paint preparation, in particular to a powder paint containing photocatalyst and a preparation method thereof.
Background
The photocatalyst is a nano-scale metal oxide material, can catalyze water or oxygen in the air into active groups with extremely strong oxidizing power such as hydroxyl free radicals, superoxide anion free radicals, active oxygen and the like with extremely strong oxidizing power under the action of light, and carries out redox reaction after contacting with surrounding harmful gases, pollutants and bacteria. The strong oxidizing groups can strongly decompose various organic compounds and partial inorganic substances with unstable chemical bonds, can destroy cell membranes of bacteria and protein carriers for coagulating viruses, and have extremely strong functions of sterilization, deodorization, antifouling, self-cleaning and air purification. The photocatalyst material is extremely effective for decomposing a small initial amount of a substance which grows, such as a microorganism like bacteria, virus, etc. The photocatalyst has the advantage of antibacterial function, and can decompose substances and dirt generated after germs die.
Although the prior art also has a field of applying the photocatalyst material to the powder coating, the following problems still exist: the photocatalytic component in the prior art has poor dispersion in the powder coating, and the photocatalytic coating can be subjected to catalytic decomposition to a certain extent under the conditions of stronger ultraviolet light and visible light, so that the catalytic effect and the antibacterial effect are poor.
Disclosure of Invention
Based on the above, in order to solve the problems that the dispersion of the photocatalytic component in the powder coating is poor, and the photocatalytic coating can be decomposed to a certain extent under the conditions of stronger ultraviolet light and visible light, so that the catalytic effect and the antibacterial effect are poor, the invention provides the powder coating containing the photocatalyst, and the specific technical scheme is as follows:
the powder coating containing the photocatalyst comprises the following preparation raw materials in parts by weight: 32-40 parts of hyperbranched epoxy resin, 26-30 parts of carboxyl-terminated polyester resin, 15-20 parts of silicon resin, 10-15 parts of epoxy modified acrylic resin, 1-5 parts of composite antibacterial agent, 1-4 parts of antioxidant, 5-11 parts of modified photocatalyst powder, 1-10 parts of composite filler and 1-3 parts of modified PTFE wax;
the composite antibacterial agent is obtained by compounding an organic antibacterial agent and an inorganic antibacterial agent according to the mass ratio of 1-3;
the modified photocatalyst is prepared by mixing nitrogen-doped titanium dioxide, iron-doped titanium dioxide and zinc-doped titanium dioxide according to the mass ratio of 1-5.
Further, the organic antibacterial agent is at least one of picoline, N-iodopropargyloxycarbonyl amino acid, stannous octoate and carbon nanotube grafted quaternary phosphonium salt.
Further, the inorganic antibacterial agent is at least one of silver phosphate, silver powder and silver bromide.
Further, the antioxidant is at least one of tris (2, 4-di-tert-butylphenyl) phosphite and n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
Further, the composite filler is at least one of barium sulfate, calcium carbonate and barite.
Further, the silane coupling agent treatment is: adding 10-15 times of silane coupling agent, setting the temperature at 45-65 ℃, stirring for 10min under the condition of 500-800 r/min, standing for 20-30 min, continuously carrying out circulating treatment for 3-5 times under the same condition, and drying.
The application also provides a preparation method of the powder coating containing the photocatalyst, which comprises the following steps:
mixing the antibacterial agent, the antioxidant and the modified photocatalyst powder, and uniformly stirring at a stirring speed of 250 r/min-500 r/min to obtain a mixture A;
mixing hyperbranched epoxy resin, carboxyl-terminated polyester resin, silicone resin, epoxy modified acrylic resin, a composite antibacterial agent, an antioxidant, modified photocatalyst powder, a composite filler and modified PTFE wax, and uniformly stirring at a stirring speed of 500 r/min-1000 r/min to obtain a mixture B;
adding the mixture A into the mixture B, and continuously stirring for 10-40 min at a stirring speed of 500-1000 r/min to obtain a mixture C;
and feeding the mixture C into a double-screw extruder for melt extrusion, and then crushing and sieving to obtain the powder coating containing the photocatalyst.
Further, the temperature of a charging section in the melt extrusion is 75-80 ℃, the temperature of a melting section is 100-110 ℃, and the temperature of a discharging section is 120 ℃.
Further, the mixture is crushed and sieved by a 180-200 mesh sieve.
In the scheme, the organic antibacterial agent and the inorganic antibacterial agent are compounded for use, so that the powder coating can have excellent antibacterial performance; the modified photocatalyst is prepared by mixing nitrogen-doped titanium dioxide, iron-doped titanium dioxide and zinc-doped titanium dioxide in a specific proportion and then carrying out modification treatment, so that a surface-modified photocatalyst material is obtained, and further the modified photocatalyst has excellent dispersibility in a powder coating system, and the components of the modified photocatalyst have synergistic effect, so that hybridization can be reduced, an electron hole pair can be generated by irradiation light with lower energy, and the modified photocatalyst can play a remarkable catalytic effect and an antibacterial effect by combining the action of a composite antibacterial agent; in addition, the powder coating is stable on the whole, the formed coating is stable, and the powder coating still has obvious formaldehyde degradation and reduces potential harm effects of organic matters on indoor environment and human body under long-time continuous illumination.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment of the invention, the powder coating containing the photocatalyst comprises the following preparation raw materials in parts by weight: 32-40 parts of hyperbranched epoxy resin, 26-30 parts of carboxyl-terminated polyester resin, 15-20 parts of silicon resin, 10-15 parts of epoxy modified acrylic resin, 1-5 parts of composite antibacterial agent, 1-4 parts of antioxidant, 5-11 parts of modified photocatalyst powder, 1-10 parts of composite filler and 1-3 parts of modified PTFE wax;
the composite antibacterial agent is obtained by compounding an organic antibacterial agent and an inorganic antibacterial agent according to the mass ratio of 1-3;
the modified photocatalyst is prepared by mixing nitrogen-doped titanium dioxide, iron-doped titanium dioxide and zinc-doped titanium dioxide according to the mass ratio of 1-5.
In one embodiment, the organic antimicrobial agent is at least one of picoline, N-iodopropargyloxycarbonylamino acid, stannous octoate, and a carbon nanotube grafted quaternary phosphonium salt.
In one embodiment, the inorganic antimicrobial agent is at least one of silver phosphate, silver powder, and silver bromide.
In one embodiment, the antioxidant is at least one of tris (2, 4-di-tert-butylphenyl) phosphite, n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
In one embodiment, the composite filler is at least one of barium sulfate, calcium carbonate and barite.
In one embodiment, the silane coupling agent treatment is: adding 10-15 times of silane coupling agent, setting the temperature at 45-65 ℃, stirring for 10min under the condition of 500-800 r/min, standing for 20-30 min, continuously carrying out circulating treatment for 3-5 times under the same condition, and drying.
The application also provides a preparation method of the powder coating containing the photocatalyst, which comprises the following steps:
mixing the antibacterial agent, the antioxidant and the modified photocatalyst powder, and uniformly stirring at a stirring speed of 250 r/min-500 r/min to obtain a mixture A;
mixing hyperbranched epoxy resin, carboxyl-terminated polyester resin, silicone resin, epoxy modified acrylic resin, a composite antibacterial agent, an antioxidant, modified photocatalyst powder, a composite filler and modified PTFE wax, and uniformly stirring at a stirring speed of 500 r/min-1000 r/min to obtain a mixture B;
adding the mixture A into the mixture B, and continuously stirring for 10-40 min at a stirring speed of 500-1000 r/min to obtain a mixture C;
and feeding the mixture C into a double-screw extruder for melt extrusion, and then crushing and sieving to obtain the powder coating containing the photocatalyst.
In one embodiment, the temperature of the feeding section in the melt extrusion is 75-80 ℃, the temperature of the melting section is 100-110 ℃, and the temperature of the discharging section is 120 ℃.
In one embodiment, the size reduction is accomplished by passing through a 180-200 mesh screen.
In the scheme, the organic antibacterial agent and the inorganic antibacterial agent are compounded for use, so that the powder coating can have excellent antibacterial performance; the modified photocatalyst is prepared by mixing nitrogen-doped titanium dioxide, iron-doped titanium dioxide and zinc-doped titanium dioxide in a specific proportion and then carrying out modification treatment, so that a surface-modified photocatalyst material is obtained, and further the modified photocatalyst has excellent dispersibility in a powder coating system, and the components of the modified photocatalyst have synergistic effect, so that hybridization can be reduced, an electron hole pair can be generated by irradiation light with lower energy, and the modified photocatalyst can play a remarkable catalytic effect and an antibacterial effect by combining the action of a composite antibacterial agent; in addition, the powder coating is stable on the whole, the formed coating is stable, and the powder coating still has obvious formaldehyde degradation and reduces potential harm effects of organic matters on indoor environment and human body under long-time continuous illumination.
Embodiments of the present invention will be described in detail below with reference to specific examples.
The preparation raw materials and the preparation raw material ratios of examples 1 to 3 and comparative examples 1 to 5 are different, and are specifically shown in table 1:
the preparation process of the powder coating in examples 1 to 3 and comparative examples 1 to 5 is as follows:
a preparation method of powder coating containing photocatalyst comprises the following steps:
mixing nitrogen-doped titanium dioxide, iron-doped titanium dioxide and zinc-doped titanium dioxide according to a certain mass ratio, adding 15 times of silane coupling agent, setting the temperature at 45-65 ℃, stirring for 10min under the condition of 500r/min, standing for 20min, continuously performing cyclic treatment for 5 times under the same condition, and drying to obtain modified photocatalyst powder;
mixing the antibacterial agent, the antioxidant and the modified photocatalyst powder, and uniformly stirring at a stirring speed of 500r/min to obtain a mixture A;
mixing hyperbranched epoxy resin, carboxyl-terminated polyester resin, silicone resin, epoxy modified acrylic resin, a composite antibacterial agent, an antioxidant, modified photocatalyst powder, a composite filler and modified PTFE wax, and uniformly stirring at a stirring speed of 1000r/min to obtain a mixture B;
adding the mixture A into the mixture B, and continuously stirring at a stirring speed of 1000r/min for 40min to obtain a mixture C;
and feeding the mixture C into a double-screw extruder for melt extrusion, and then crushing and sieving by a 200-mesh sieve to obtain the powder coating containing the photocatalyst.
Comparative example 6:
the only difference from example 3 is that the nitrogen-doped titanium dioxide, iron-doped titanium dioxide, and zinc-doped titanium dioxide in comparative example 6 were not treated with a silane coupling agent, and the other examples were the same as example 3.
Table 1: parts by weight of
The powder coatings obtained in examples 1 to 3 and comparative examples 1 to 6 were tested.
And (3) performance testing: the results are shown in Table 2. The powder coating is tested according to HG/T2006-2006 standard, wherein the conventional performances of the powder coating, such as gel time, coating appearance, coating thickness, hardness, adhesion, impact resistance, bending resistance, glossiness, alkali resistance, acid resistance, boiling water resistance, moist heat resistance, artificial aging resistance and the like, are tested.
Table 2:
the data analysis in table 1 shows that the components and the component proportions of the coating are different, which can change the performance of the coating, and the modification of the photocatalyst component of the coating is helpful for improving the overall dispersibility of the powder coating, so that the coating with a smooth and flat surface is formed, and the coating has excellent overall adhesion, weather resistance and acid and alkali resistance, is free from cracking and peeling after manual treatment, and has excellent service performance.
And (3) testing degraded formaldehyde: noraldehyde degradation tests were performed according to JC/T1074 2008 and GB/T16129 1995; the test method comprises the following steps: the sample apparatus is 1m 3 The test chamber, the intelligent constant-current atmosphere sampler and the ultraviolet visible spectrophotometer have the test conditions of ringAmbient temperature (20 + -2) ° c, ambient humidity (50 + -10) ° c, and 5, after coating the powder coatings prepared in examples 1 to 3 and comparative examples 1 to 6 to form coatings, coating samples (both having a specification of 400mmx400 mm) were placed in a test chamber, a blank test chamber was set, and the results obtained are shown in table 3.
Table 3:
the data analysis in table 3 shows that the modified photocatalyst components in the present application have a synergistic effect and can play an excellent role in degrading formaldehyde, and the use of the composite antibacterial agent can play a certain positive role in degrading formaldehyde in the present application, which indicates that the overall performance of the powder coating system in the present application is changed due to the change of the components and the ratio of the components, and indicates that the present application is creative as a complete technical formula. In contrast, comparative example 6, in which the component was not modified, and the component that was not modified was added to the powder coating, exhibited a degrading effect.
And (3) antibacterial test: the results obtained are shown in Table 4 with reference to GB/T30706-2014.
Table 4:
from the data analysis recorded in table 4, it can be seen that the powder coating in the present application has excellent antibacterial effect, and the change of the antibacterial component in comparative examples 1 to 2 causes a significant decrease in antibacterial performance, which indicates that the addition of the antibacterial component in the present application has significant antibacterial performance, but from comparative examples 3 to 6, it can be seen that, on the premise of adding the composite antibacterial component, the change of the component of the modified photocatalyst causes the antibacterial performance to be still inferior to that in examples 1 to 3, which indicates that the change of the component of the modified photocatalyst and the change of the process also affect the antibacterial effect of the present application, which indicates that there is a synergistic effect between the components of the present application, which has an effect of one plus one over two.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The powder coating containing the photocatalyst is characterized by comprising the following preparation raw materials in parts by weight: 32-40 parts of hyperbranched epoxy resin, 26-30 parts of carboxyl-terminated polyester resin, 15-20 parts of silicone resin, 10-15 parts of epoxy modified acrylic resin, 1-5 parts of composite antibacterial agent, 1-4 parts of antioxidant, 5-11 parts of modified photocatalyst powder, 1-10 parts of composite filler and 1-3 parts of modified PTFE wax;
the composite antibacterial agent is obtained by compounding an organic antibacterial agent and an inorganic antibacterial agent according to the mass ratio of 1-3;
the modified photocatalyst is prepared by mixing nitrogen-doped titanium dioxide, iron-doped titanium dioxide and zinc-doped titanium dioxide according to the mass ratio of 1-5.
2. The photocatalyst-containing powder coating material as claimed in claim 1, wherein the organic antibacterial agent is at least one of picoline, N-iodopropargyloxycarbonylamino acid, stannous octoate, and carbon nanotube-grafted quaternary ammonium salt.
3. The photocatalyst-containing powder coating material as claimed in claim 1, wherein the inorganic antibacterial agent is at least one of silver phosphate, silver powder and silver bromide.
4. The photocatalyst-containing powder coating material as claimed in claim 1, wherein the antioxidant is at least one of tris (2, 4-di-tert-butylphenyl) phosphite and n-octadecyl- β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
5. The photocatalyst-containing powder coating material as claimed in claim 1, wherein the composite filler is at least one of barium sulfate, calcium carbonate and barite.
6. The photocatalyst-containing powder coating material as claimed in claim 1, wherein the silane coupling agent treatment is: adding 10-15 times of silane coupling agent, setting the temperature at 45-65 ℃, stirring for 10min under the condition of 500-800 r/min, standing for 20-30 min, continuously carrying out circulating treatment for 3-5 times under the same condition, and drying.
7. A method for preparing a photocatalyst-containing powder coating material, which is used for preparing the photocatalyst-containing powder coating material according to any one of claims 1 to 6, comprising the steps of:
mixing the antibacterial agent, the antioxidant and the modified photocatalyst powder, and uniformly stirring at a stirring speed of 250-500 r/min to obtain a mixture A;
mixing hyperbranched epoxy resin, carboxyl-terminated polyester resin, silicon resin, epoxy modified acrylic resin, a composite antibacterial agent, an antioxidant, modified photocatalyst powder, a composite filler and modified PTFE wax, and uniformly stirring at a stirring speed of 500 r/min-1000 r/min to obtain a mixture B;
adding the mixture A into the mixture B, and continuously stirring for 10-40 min at a stirring speed of 500-1000 r/min to obtain a mixture C;
and feeding the mixture C into a double-screw extruder for melt extrusion, and then crushing and sieving to obtain the powder coating containing the photocatalyst.
8. The preparation method according to claim 7, wherein the temperature of the feeding section in the melt extrusion is 75-80 ℃, the temperature of the melting section is 100-110 ℃, and the temperature of the discharging section is 120 ℃.
9. The method of claim 7, wherein the step of pulverizing and sieving is carried out by a 180-200 mesh sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326345.7A CN115746657B (en) | 2022-10-27 | 2022-10-27 | Powder coating containing photocatalyst and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326345.7A CN115746657B (en) | 2022-10-27 | 2022-10-27 | Powder coating containing photocatalyst and preparation method thereof |
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| JP2006082071A (en) * | 2004-02-20 | 2006-03-30 | Sekisui Jushi Co Ltd | Photocatalytic composition, building material for interior finish, coating material, synthetic resin molded body, method for utilizing photocatalyst and method for decomposing harmful substance |
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| CN110903727A (en) * | 2019-12-12 | 2020-03-24 | 广东长鑫环保科技有限公司 | Plant antibacterial coating capable of decomposing formaldehyde and releasing negative ions |
| CN112094555A (en) * | 2020-09-23 | 2020-12-18 | 安徽喜尔奇日用品有限公司 | Nano titanium dioxide doped water-based paint with sterilization function and production process |
| CN115093776A (en) * | 2022-07-08 | 2022-09-23 | 广东睿智环保科技有限责任公司 | Antibacterial powder coating for MDF heat transfer printing and application method thereof |
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| JP2006082071A (en) * | 2004-02-20 | 2006-03-30 | Sekisui Jushi Co Ltd | Photocatalytic composition, building material for interior finish, coating material, synthetic resin molded body, method for utilizing photocatalyst and method for decomposing harmful substance |
| CN109627921A (en) * | 2018-12-29 | 2019-04-16 | 六安科瑞达新型材料有限公司 | A kind of Ag-carried nanometer titanium dioxide antibacterial powder paint |
| CN110903727A (en) * | 2019-12-12 | 2020-03-24 | 广东长鑫环保科技有限公司 | Plant antibacterial coating capable of decomposing formaldehyde and releasing negative ions |
| CN112094555A (en) * | 2020-09-23 | 2020-12-18 | 安徽喜尔奇日用品有限公司 | Nano titanium dioxide doped water-based paint with sterilization function and production process |
| CN115093776A (en) * | 2022-07-08 | 2022-09-23 | 广东睿智环保科技有限责任公司 | Antibacterial powder coating for MDF heat transfer printing and application method thereof |
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| 崔玉民等编著: "《纳米材料化学的理论与工程应用研究》", vol. 1, 电子科技大学出版社, pages: 316 - 107 * |
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