CN116716013A - Anticorrosive powder coating containing modified graphene and preparation method thereof - Google Patents
Anticorrosive powder coating containing modified graphene and preparation method thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 238000000576 coating method Methods 0.000 title claims abstract description 69
- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 239000000843 powder Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000003822 epoxy resin Substances 0.000 claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 22
- 229920001225 polyester resin Polymers 0.000 claims abstract description 21
- 239000004645 polyester resin Substances 0.000 claims abstract description 21
- 229960000892 attapulgite Drugs 0.000 claims abstract description 19
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 19
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- 239000007787 solid Substances 0.000 claims description 35
- 229910021389 graphene Inorganic materials 0.000 claims description 29
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- ZORQXIQZAOLNGE-UHFFFAOYSA-N 1,1-difluorocyclohexane Chemical compound FC1(F)CCCCC1 ZORQXIQZAOLNGE-UHFFFAOYSA-N 0.000 claims description 23
- 239000003607 modifier Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 17
- 229940035049 sorbitan monooleate Drugs 0.000 claims description 15
- 235000011069 sorbitan monooleate Nutrition 0.000 claims description 15
- 239000001593 sorbitan monooleate Substances 0.000 claims description 15
- 239000011592 zinc chloride Substances 0.000 claims description 14
- 235000005074 zinc chloride Nutrition 0.000 claims description 14
- CRGOPMLUWCMMCK-UHFFFAOYSA-M benzyl-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical group [Cl-].CC(=C)C(=O)OCC[N+](C)(C)CC1=CC=CC=C1 CRGOPMLUWCMMCK-UHFFFAOYSA-M 0.000 claims description 13
- 239000013067 intermediate product Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 23
- 239000000853 adhesive Substances 0.000 abstract description 14
- 230000001070 adhesive effect Effects 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 7
- 239000003513 alkali Substances 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 description 17
- 239000003973 paint Substances 0.000 description 11
- IBVAQQYNSHJXBV-UHFFFAOYSA-N adipic acid dihydrazide Chemical compound NNC(=O)CCCCC(=O)NN IBVAQQYNSHJXBV-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ZGCZDEVLEULNLJ-UHFFFAOYSA-M benzyl-dimethyl-(2-prop-2-enoyloxyethyl)azanium;chloride Chemical group [Cl-].C=CC(=O)OCC[N+](C)(C)CC1=CC=CC=C1 ZGCZDEVLEULNLJ-UHFFFAOYSA-M 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of powder coating preparation, and particularly discloses an anti-corrosion powder coating containing modified graphene and a preparation method thereof. The modified graphene-containing anticorrosive powder coating comprises the following raw material components in parts by weight: 60-80 parts of epoxy resin; 40-60 parts of polyester resin; 20-30 parts of modified graphene; 20-30 parts of attapulgite; 1-5 parts of auxiliary agent. The modified graphene-containing anticorrosive powder coating has good acid and alkali resistance; it has certain corrosion resistance to acid and alkali corrosion. In addition, compared with the method for adding unmodified graphene, the modified graphene prepared by the method can obviously improve the adhesive force of the anti-corrosion powder coating; the prepared anti-corrosion powder coating has better adhesive force.
Description
Technical Field
The invention relates to the technical field of powder coating preparation, in particular to an anti-corrosion powder coating containing modified graphene and a preparation method thereof.
Background
The anticorrosive paint is a special paint in paint coatings; which includes conventional anticorrosive coatings and heavy duty anticorrosive coatings. The conventional anticorrosive paint is paint which can perform an anticorrosive function on an object under general conditions; heavy duty anticorrosive coatings can be used in relatively harsh corrosive environments as compared to conventional anticorrosive coatings, and can achieve a class of anticorrosive coatings that has a longer shelf life than conventional anticorrosive coatings.
Chinese patent 201410377861.1 discloses a graphene anticorrosive powder coating and a preparation method thereof; the weight portions of the components are as follows: 25-70 parts of epoxy resin, 25-70 parts of polyester resin, 5-40 parts of titanium dioxide, 5-40 parts of barium sulfate, 3-10 parts of auxiliary agent, 0.5-10 parts of graphene and the balance of other pigments. The powder coating has excellent anti-corrosion performance. However, it was found that the adhesion of the graphene anticorrosive powder coating is still further improved.
Disclosure of Invention
In order to overcome at least one technical problem existing in the prior art, the invention provides an anticorrosive powder coating containing modified graphene.
The technical scheme of the invention is as follows:
the invention firstly provides an anti-corrosion powder coating containing modified graphene, which comprises the following raw material components in parts by weight:
60-80 parts of epoxy resin; 40-60 parts of polyester resin; 20-30 parts of modified graphene; 20-30 parts of attapulgite; 1-5 parts of auxiliary agent.
The inventors have surprisingly found in the research that the addition of modified graphene prepared by the method of the invention to the anti-corrosion powder coating of the invention can significantly improve the adhesion of the anti-corrosion powder coating compared with the addition of unmodified graphene.
Preferably, the modified graphene-containing anticorrosive powder coating comprises the following raw material components in parts by weight:
70-80 parts of epoxy resin; 50-60 parts of polyester resin; 25-30 parts of modified graphene; 25-30 parts of attapulgite; 3-5 parts of auxiliary agent.
Most preferably, the modified graphene-containing anticorrosive powder coating comprises the following raw material components in parts by weight:
70 parts of epoxy resin; 50 parts of polyester resin; 25 parts of modified graphene; 25 parts of attapulgite; 3 parts of auxiliary agent.
Preferably, the modified graphene is prepared by the following method:
(1) Adding graphene into water, adding zinc chloride, stirring for 10-20 min, adding sodium hydroxide, and continuously stirring for 1-2 h; separating the solids to obtain an intermediate product;
(2) Calcining the intermediate product at 1000-1200 ℃ for 2-4 h to obtain calcined solid; namely the modified graphene.
Further preferably, the weight ratio of graphene to water in the step (1) is 1:8-10.
Most preferably, the weight ratio of graphene to water in step (1) is 1:9.
Further preferably, the weight ratio of the graphene to the zinc chloride to the sodium hydroxide is 15-25:1-2:1-2.
Most preferably, the weight ratio of graphene to zinc chloride to sodium hydroxide is 20:1.4:1.2.
Further preferably, the preparation method of the modified graphene further comprises the following steps:
adding calcined solid into water, heating to 80-100 ℃, adding modifier, stirring for 2-4 h, separating solid, and drying the solid to obtain the modified graphene.
Further preferably, the weight ratio of calcined solids, modifier and water is 8-12:2-4:100;
most preferably, the weight ratio of calcined solids, modifier, and water is 10:3:100;
further preferably, the modifier is selected from the group consisting of methacryloxyethyl dimethylbenzyl ammonium chloride or sorbitan monooleate (SP-80).
In the further research, the inventor finds that in the preparation process of the modified graphene, the modified graphene obtained by further modifying the modified graphene by using methacryloxyethyl dimethylbenzyl ammonium chloride or sorbitan monooleate (SP-80) can further improve the adhesive force of the anticorrosive paint compared with the modified graphene prepared by not adopting the step.
Preferably, the modifier consists of methacryloxyethyl dimethylbenzyl ammonium chloride and sorbitan monooleate (SP-80).
In the further research, the inventor finds that in the preparation process of the modified graphene, the modified graphene obtained by further modifying the modified graphene by using methacryloxyethyl dimethylbenzyl ammonium chloride or sorbitan monooleate (SP-80) can further improve the adhesive force of the anticorrosive paint; but not to a great extent. The inventor has surprisingly found in a large number of experiments that in the preparation process of the modified graphene, the modified graphene obtained by further adopting methacryloxyethyl dimethyl benzyl ammonium chloride and sorbitan monooleate (SP-80) for modification can greatly improve the adhesive force of the anticorrosive paint; the improvement degree of the adhesive force of the anti-corrosion coating is greatly higher than that of modified graphene obtained by modifying only single methacryloxyethyl dimethyl benzyl ammonium chloride or only single sorbitan monooleate (SP-80).
Further preferably, the weight ratio of methacryloxyethyl dimethylbenzyl ammonium chloride to sorbitan monooleate (SP-80) is 1 to 3:1 to 3.
Most preferably, the weight ratio of methacryloxyethyl dimethylbenzyl ammonium chloride to sorbitan monooleate (SP-80) is 1:1.
preferably, the auxiliary agent comprises a curing agent and a leveling agent.
The invention also provides a preparation method of the anticorrosive powder coating containing the modified graphene, which comprises the following steps:
uniformly mixing epoxy resin, polyester resin, modified graphene, attapulgite and an auxiliary agent, extruding by a double-screw extruder, tabletting, crushing, and crushing by a pulverizer to obtain the modified graphene anticorrosive powder coating.
The beneficial effects are that: the invention provides a brand new composition of anticorrosive powder coating containing modified graphene; the modified graphene-containing anticorrosive powder coating has good acid and alkali resistance; it has certain corrosion resistance to acid and alkali corrosion. In addition, compared with the method for adding unmodified graphene, the modified graphene prepared by the method can obviously improve the adhesive force of the anti-corrosion powder coating; the prepared anti-corrosion powder coating has better adhesive force.
Detailed Description
The present invention is further explained below with reference to specific examples, which are not intended to limit the present invention in any way.
In the following examples, the polyester resin was used with the brand of 9005-6-73 manufactured by kepler, shandong; the epoxy resin adopts bisphenol A solid epoxy resin with the brand of CYD-011 (E-20) produced by Baling petrochemical industry; the remaining raw materials without marked sources are all conventional raw materials which can be purchased by a person skilled in the art through conventional purchasing routes; the sources of the above raw materials of the present invention do not limit the protection scope of the present invention.
EXAMPLE 1 preparation of anticorrosive powder coating containing modified graphene
The raw materials comprise the following components in parts by weight: 70 parts of epoxy resin; 50 parts of polyester resin; 25 parts of modified graphene; 25 parts of attapulgite; 2 parts of a curing agent (adipic acid dihydrazide); 1 part of leveling agent (leveling agent PV 88);
the modified graphene is prepared by the following method:
(1) Adding graphene into water, then adding zinc chloride, stirring for 15min, then adding sodium hydroxide, and continuing stirring for 1.5h; separating the solids to obtain an intermediate product; wherein the weight ratio of graphene to water is 1:9; the weight ratio of the graphene to the zinc chloride to the sodium hydroxide is 20:1.4:1.2;
(2) Calcining the intermediate product at 1100 ℃ for 3 hours to obtain a calcined solid; namely the modified graphene.
The preparation method comprises the following steps: uniformly mixing epoxy resin, polyester resin, modified graphene, attapulgite and an auxiliary agent, extruding by a double-screw extruder, tabletting, crushing, and crushing by a pulverizer to obtain the modified graphene anticorrosive powder coating.
EXAMPLE 2 preparation of anticorrosive powder coating containing modified graphene
The raw materials comprise the following components in parts by weight: 70 parts of epoxy resin; 50 parts of polyester resin; 25 parts of modified graphene; 25 parts of attapulgite; 2 parts of a curing agent (adipic acid dihydrazide); 1 part of leveling agent (leveling agent PV 88);
the modified graphene is prepared by the following method:
(1) Adding graphene into water, then adding zinc chloride, stirring for 15min, then adding sodium hydroxide, and continuing stirring for 1.5h; separating the solids to obtain an intermediate product; wherein the weight ratio of graphene to water is 1:9; the weight ratio of the graphene to the zinc chloride to the sodium hydroxide is 20:1.4:1.2;
(2) Calcining the intermediate product at 1100 ℃ for 3 hours to obtain a calcined solid;
(3) Adding calcined solids into water, heating to 90 ℃, adding a modifier, stirring for 3 hours, separating solids, and drying the solids to obtain the modified graphene;
in the step (3), the weight ratio of calcined solid, modifier and water is 10:3:100; the modifier is methacryloyloxyethyl dimethyl benzyl ammonium chloride.
The preparation method comprises the following steps: uniformly mixing epoxy resin, polyester resin, modified graphene, attapulgite and an auxiliary agent, extruding by a double-screw extruder, tabletting, crushing, and crushing by a pulverizer to obtain the modified graphene anticorrosive powder coating.
Example 3 preparation of anticorrosive powder coating containing modified graphene
The raw materials comprise the following components in parts by weight: 70 parts of epoxy resin; 50 parts of polyester resin; 25 parts of modified graphene; 25 parts of attapulgite; 2 parts of a curing agent (adipic acid dihydrazide); 1 part of leveling agent (leveling agent PV 88);
the modified graphene is prepared by the following method:
(1) Adding graphene into water, then adding zinc chloride, stirring for 15min, then adding sodium hydroxide, and continuing stirring for 1.5h; separating the solids to obtain an intermediate product; wherein the weight ratio of graphene to water is 1:9; the weight ratio of the graphene to the zinc chloride to the sodium hydroxide is 20:1.4:1.2;
(2) Calcining the intermediate product at 1100 ℃ for 3 hours to obtain a calcined solid;
(3) Adding calcined solids into water, heating to 90 ℃, adding a modifier, stirring for 3 hours, separating solids, and drying the solids to obtain the modified graphene;
in the step (3), the weight ratio of calcined solid, modifier and water is 10:3:100; the modifier is sorbitan monooleate (SP-80).
The preparation method comprises the following steps: uniformly mixing epoxy resin, polyester resin, modified graphene, attapulgite and an auxiliary agent, extruding by a double-screw extruder, tabletting, crushing, and crushing by a pulverizer to obtain the modified graphene anticorrosive powder coating.
EXAMPLE 4 preparation of anticorrosive powder coating containing modified graphene
The raw materials comprise the following components in parts by weight: 70 parts of epoxy resin; 50 parts of polyester resin; 25 parts of modified graphene; 25 parts of attapulgite; 2 parts of a curing agent (adipic acid dihydrazide); 1 part of leveling agent (leveling agent PV 88);
the modified graphene is prepared by the following method:
(1) Adding graphene into water, then adding zinc chloride, stirring for 15min, then adding sodium hydroxide, and continuing stirring for 1.5h; separating the solids to obtain an intermediate product; wherein the weight ratio of graphene to water is 1:9; the weight ratio of the graphene to the zinc chloride to the sodium hydroxide is 20:1.4:1.2;
(2) Calcining the intermediate product at 1100 ℃ for 3 hours to obtain a calcined solid;
(3) Adding calcined solids into water, heating to 90 ℃, adding a modifier, stirring for 3 hours, separating solids, and drying the solids to obtain the modified graphene;
in the step (3), the weight ratio of calcined solid, modifier and water is 10:3:100; the weight ratio is 1:1 and sorbitan monooleate (SP-80).
The preparation method comprises the following steps: uniformly mixing epoxy resin, polyester resin, modified graphene, attapulgite and an auxiliary agent, extruding by a double-screw extruder, tabletting, crushing, and crushing by a pulverizer to obtain the modified graphene anticorrosive powder coating.
Comparative example 1 preparation of graphene-containing anticorrosive powder coating
The raw materials comprise the following components in parts by weight: 70 parts of epoxy resin; 50 parts of polyester resin; 25 parts of graphene; 25 parts of attapulgite; 2 parts of a curing agent (adipic acid dihydrazide); 1 part of leveling agent (leveling agent PV 88);
uniformly mixing epoxy resin, polyester resin, graphene, attapulgite and an auxiliary agent, extruding by a double-screw extruder, tabletting, crushing, and crushing by a pulverizer to obtain the modified graphene anticorrosive powder coating.
The modified graphene-containing anticorrosive powder coating or the graphene-containing anticorrosive powder coating prepared in examples 1 to 4 and comparative example 1 are respectively sprayed on a steel plate to prepare steel plate splines, and the steel plate splines are left for 7 days; acid and alkali resistance and adhesive force are tested.
The acid-base resistance test method comprises the following steps: the steel plate bars were respectively immersed in a sulfuric acid or sodium hydroxide aqueous solution containing 30% by mass, and the time of foaming of the coating was recorded. The adhesion test was performed using a pull-apart method. The test results are shown in Table 1.
TABLE 1 Performance test results of the modified graphene-containing anticorrosive powder coating of the present invention
From the experimental data in table 1, it can be seen that the modified graphene-containing anticorrosive powder coating prepared in examples 1 to 4 has better acid and alkali resistance; it has certain corrosion resistance to acid and alkali corrosion.
As can be seen from the experimental data in table 1, the anti-corrosion powder coating containing modified graphene prepared in example 1 has significantly higher adhesion than the anti-corrosion powder coating containing modified graphene prepared in comparative example 1; this illustrates: compared with the modified graphene prepared by the method, the modified graphene can remarkably improve the adhesive force of the anti-corrosion powder coating.
As can be seen from the experimental data in table 1, the adhesion of the modified graphene-containing anticorrosive powder coating prepared in examples 2 and 3 is further higher than that of the modified graphene-containing anticorrosive powder coating prepared in example 1; this illustrates: in the preparation process of the modified graphene, the modified graphene obtained by further modifying the methacryloxyethyl dimethylbenzyl ammonium chloride or sorbitan monooleate (SP-80) can further improve the adhesive force of the anticorrosive paint compared with the modified graphene prepared by the step.
As can be seen from the experimental data in table 1, the adhesion of the anticorrosive powder coating containing modified graphene prepared in example 4 is much higher than that of the anticorrosive powder coating containing modified graphene prepared in example 1; meanwhile, the corrosion-resistant powder coating containing the modified graphene is also greatly higher than the corrosion-resistant powder coating containing the modified graphene prepared in the examples 2 and 3; this illustrates: in the preparation process of the modified graphene, the modified graphene obtained by further modifying the methacryloxyethyl dimethyl benzyl ammonium chloride or sorbitan monooleate (SP-80) can further improve the adhesive force of the anticorrosive paint; but not to a great extent. The experimental result shows that in the preparation process of the modified graphene, the modified graphene obtained by modifying the methacryloxyethyl dimethylbenzyl ammonium chloride and the sorbitan monooleate (SP-80) is further adopted at the same time, so that the adhesive force of the anticorrosive paint can be greatly improved; the improvement degree of the adhesive force of the anti-corrosion coating is greatly higher than that of modified graphene obtained by modifying only single methacryloxyethyl dimethyl benzyl ammonium chloride or only single sorbitan monooleate (SP-80).
Claims (10)
1. The anticorrosive powder coating containing the modified graphene is characterized by comprising the following raw material components in parts by weight:
60-80 parts of epoxy resin; 40-60 parts of polyester resin; 20-30 parts of modified graphene; 20-30 parts of attapulgite; 1-5 parts of auxiliary agent.
2. The modified graphene-containing anticorrosive powder coating according to claim 1, comprising the following raw material components in parts by weight:
70-80 parts of epoxy resin; 50-60 parts of polyester resin; 25-30 parts of modified graphene; 25-30 parts of attapulgite; 3-5 parts of auxiliary agent.
3. The modified graphene-containing anticorrosive powder coating according to claim 1, comprising the following raw material components in parts by weight:
70 parts of epoxy resin; 50 parts of polyester resin; 25 parts of modified graphene; 25 parts of attapulgite; 3 parts of auxiliary agent.
4. The modified graphene-containing anticorrosive powder coating according to claim 1, wherein the modified graphene is prepared by the following method:
(1) Adding graphene into water, adding zinc chloride, stirring for 10-20 min, adding sodium hydroxide, and continuously stirring for 1-2 h; separating the solids to obtain an intermediate product;
(2) Calcining the intermediate product at 1000-1200 ℃ for 2-4 h to obtain calcined solid; namely the modified graphene.
5. The modified graphene-containing anticorrosive powder coating according to claim 4, wherein the weight ratio of graphene to water in the step (1) is 1:8-10;
most preferably, the weight ratio of graphene to water in step (1) is 1:9.
6. The modified graphene-containing anticorrosive powder coating according to claim 4, wherein the weight ratio of graphene to zinc chloride to sodium hydroxide is 15-25:1-2:1-2;
most preferably, the weight ratio of graphene to zinc chloride to sodium hydroxide is 20:1.4:1.2.
7. The modified graphene-containing anticorrosive powder coating according to claim 4, wherein the preparation method of the modified graphene further comprises the following steps:
adding calcined solid into water, heating to 80-100 ℃, adding modifier, stirring for 2-4 h, separating solid, and drying the solid to obtain the modified graphene.
8. The modified graphene-containing anticorrosive powder coating according to claim 7, wherein the weight ratio of calcined solids, modifier and water is 8-12:2-4:100;
most preferably, the weight ratio of calcined solids, modifier, and water is 10:3:100.
9. The modified graphene-containing anticorrosive powder coating according to claim 7, wherein the modifier is selected from methacryloxyethyl dimethylbenzyl ammonium chloride or sorbitan monooleate.
10. The method for preparing the modified graphene-containing anticorrosive powder coating according to any one of claims 1 to 9, comprising the following steps:
uniformly mixing epoxy resin, polyester resin, modified graphene, attapulgite and an auxiliary agent, extruding by a double-screw extruder, tabletting, crushing, and crushing by a pulverizer to obtain the modified graphene anticorrosive powder coating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310710063.5A CN116716013A (en) | 2023-06-15 | 2023-06-15 | Anticorrosive powder coating containing modified graphene and preparation method thereof |
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| CN202310710063.5A CN116716013A (en) | 2023-06-15 | 2023-06-15 | Anticorrosive powder coating containing modified graphene and preparation method thereof |
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| CN202310710063.5A Pending CN116716013A (en) | 2023-06-15 | 2023-06-15 | Anticorrosive powder coating containing modified graphene and preparation method thereof |
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