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Graphene epoxy composite anticorrosion coating, its preparation method and application

A technology of anti-corrosion coatings and ethylene epoxy, applied in the field of coatings, can solve problems such as easy agglomeration and poor coating protection effect, and achieve the effects of not easy to sink, low cost, and good storage stability

Active Publication Date: 2020-07-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when graphene is directly added to polymers or resins, it is easy to agglomerate due to the π-π conjugation of graphene and the adsorption of van der Waals force, and it is difficult to uniformly disperse in polymers or resins, resulting in micro Pores still exist and the resulting coating has poor protection

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  • Graphene epoxy composite anticorrosion coating, its preparation method and application
  • Graphene epoxy composite anticorrosion coating, its preparation method and application
  • Graphene epoxy composite anticorrosion coating, its preparation method and application

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[0064] The present invention also provides a kind of preparation method of graphene epoxy composite anticorrosion coating, it comprises:

[0065] Graphene and polyaniline nanofibers are uniformly dispersed in a solvent to obtain a graphene dispersion, and then the graphene dispersion is uniformly mixed with epoxy resin, additives and solvents to form component one;

[0066] And, the epoxy resin curing agent is provided as the second component, or the epoxy resin curing agent is diluted with a solvent to form the second component.

[0067] More preferably, the molar ratio of graphene to polyaniline nanofibers in the graphene dispersion is 50:1 to 1:50, preferably 10:1 to 1:10, more preferably 5:1 to 1:5 .

[0068] The embodiment of the present invention also provides the application of the graphene epoxy composite anticorrosion coating.

[0069] For example, an embodiment of the present invention also provides a coating formed by the graphene-epoxy composite anticorrosion coa...

Embodiment 1

[0085] (1) 0.25g poly 2-butylaniline nanofibers (morphology such as figure 1 As shown, the diameter is about 50nm and the length is about 0.7μm, which can be prepared by referring to the method described above), 0.25g graphene nanosheets (thickness about 3-5nm) are dispersed in 50mL acetone for 1h, and the graphene dispersion is obtained ;

[0086] (2) The graphene dispersion liquid that step (1) makes is mixed with 32g epoxy resin (model is E44, purchased from Jiangsu Wujiang Heli Resin Factory), 2g leveling agent (ethylene glycol butyl ether or acetate butyl cellulose etc. ), 2g anti-settling agent (fumed silica or organic bentonite, etc.), 3g mineral oil defoamer and 8g xylene reagent were mechanically stirred for 30 minutes and mixed uniformly to obtain component one;

[0087] (3) 10g polyamide 650 is mixed with 4g xylene solution to obtain component two;

[0088] (4) Component one prepared in step (2) is mixed with component two prepared in step (3) in a mass ratio of 1...

Embodiment 2

[0097] (1) Disperse 0.6g of poly-o-ethylaniline nanofibers (about 60nm in diameter and about 0.5μm in length) and 0.6g of graphene (graphene microflakes, about 20nm in thickness) in 120mL of tetrahydrofuran for 1 hour to obtain graphene Dispersion liquid, wherein the content of graphene in tetrahydrofuran reaches 5mg / mL after being modified by poly-o-ethylaniline nanofibers;

[0098] (2) Graphene dispersion liquid that step (1) is made and 40g epoxy resin (bisphenol S type epoxy resin, methylol bisphenol F type epoxy resin or hydrogenated bisphenol F type epoxy resin etc.) , 3g leveling agent (polydimethylsilane or polymethylphenylsiloxane, etc.), 3g anti-settling agent (polyamide wax or organic swelling, etc.), 4g polyether defoamer and 10g toluene reagent Stir mechanically for 30 minutes to mix evenly to obtain component 1;

[0099] (3) 10g polyamide 650 is mixed with 6g toluene solution to obtain component two;

[0100] (4) Component one prepared in step (2) is mixed with...

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Abstract

The invention discloses a graphene-epoxy composite anticorrosive coating and a preparation method and application thereof. The anticorrosive coating mainly comprises graphene, polyaniline nanofibers,epoxy resin, a dispersion medium, a coating assistant and an epoxy resin curing agent. The graphene-epoxy composite anticorrosive coating has the advantages of excellent corrosion and wear resistance,particularly has long-lasting wear-resistant and corrosion-resistant effects on particles, pulverized coal, dust, flue gas or liquid for a long time, has good application prospects in large equipmentsuch as pipelines, chemical equipment, bridges, ships and offshore platforms, is prepared through simple processes, realizes a low cost and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a graphene epoxy composite anticorrosion coating, a preparation method and application thereof, and belongs to the technical field of coatings. Background technique [0002] Metal corrosion has caused serious harm to the national economy and social life. According to the findings, the economic loss caused by metal corrosion is about 4% of the country's gross national product. According to statistics, the annual loss of metal corrosion far exceeds the sum of losses caused by floods, fires, wind disasters and earthquakes (average value), and does not include indirect losses caused by shutdowns, production reductions and explosions caused by corrosion. [0003] Currently, organic coating surface coating technology (or its combination with electrochemical protection technology) is a common measure for corrosion protection. The protective effects of organic coatings on metals mainly include shielding, passivation, protection of an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/65C09D7/47C09D7/45
CPCC08K2201/011C08L2205/035C08L2205/16C09D5/08C09D163/00C08L79/02C08K7/00C08K3/04
Inventor 王立平陈诚邱诗惠崔明君赵海超
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI