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Modified graphene epoxy composite anti-corrosive coating and preparation method thereof

An anti-corrosion coating and graphene technology, applied in the field of coatings, can solve problems such as hindering application, and achieve the effects of enhancing dispersion and solubility, improving uniform dispersion and improving corrosion resistance.

Inactive Publication Date: 2021-03-23
南京博科新材料产业研究院有限公司
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Problems solved by technology

However, the high specific surface area of ​​graphene oxide (GO) and the agglomeration phenomenon of the polymer matrix caused by hydrogen bonding hinder its application.

Method used

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with specific embodiments.

[0020] A preparation method for modified graphene epoxy composite anticorrosion coating, specifically comprises the steps:

[0021] (1) Preparation of graphene oxide: will contain concentrated H 2 SO 4 Place the three-neck flask with ice in a water bath for 5 minutes, then add graphite powder to continue the reaction for 30 minutes, and then add NaNO 3 React for 30min, then add KMnO 4 Carry out deep oxidation for 2 hours; finally add hydrogen peroxide to carry out the deepest oxidation. In the prepared HCl solution, discard the supernatant after 24 hours, centrifuge and wash the lower layer product, and finally dry the product to obtain graphene oxide;

[0022] The graphite powder, NaNO 3 and KMnO 4 The mass ratio is 2:1:6;

[0023] (2) Preparation of functionally modified graphene: add the graphene oxide obtained in step (1) into the DMF beaker that has been remov...

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Abstract

The invention discloses a modified graphene epoxy composite anti-corrosive coating and a preparation method thereof. The preparation method comprises the following steps of: preparing graphene oxide by adopting an improved Hummers method, then adding a modifier into the graphene oxide for functional modification, adding hydrazine hydrate in the reaction process to prepare modified graphene, and mixing the modified graphene with waterborne epoxy resin to prepare the modified graphene epoxy composite anti-corrosive coating. According to the preparation method disclosed by the invention, the graphene is modified by adopting hexamethylene diisocyanate and polyisocyanate, so that the dispersion solubility of the successfully prepared functional modified graphene in a solvent is remarkably enhanced, and the problem that the graphene is easy to agglomerate is solved; and the modified graphene is introduced into the waterborne epoxy resin, so that the uniform dispersity of the graphene in thewaterborne epoxy resin coating is improved, the interaction and compatibility between the graphene and an EP chain segment are enhanced, and the corrosion resistance of the composite coating is improved.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a modified graphene epoxy composite anticorrosion coating and a preparation method thereof. Background technique [0002] In 1909, scientist Prileschajew discovered the preparation method of epoxy-type compounds, which provided important clues for subsequent people to explore the synthesis route of epoxy resin. Epoxy resin is defined as a low molecular weight prepolymer not limited to only one epoxy group. It is a thermosetting resin, which is mainly obtained by using different types of curing agents to participate in the curing reaction. Its performance is mainly determined by epoxy resin The type and the combination of the curing agent used are determined. Due to its high hardness, good chemical and mechanical resistance, high adhesion to many substrates, and good thermal performance, epoxy resin is currently widely used in fiber reinforced materials, general adhesives, and packaging m...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/62
CPCC09D5/08C09D163/00C09D7/62C08K9/04C08K3/042
Inventor 周栋梁秦玉娇赵君
Owner 南京博科新材料产业研究院有限公司
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