Graphene/epoxy resin composite anticorrosive paint with high isolation and preparation method

A technology of epoxy resin and anti-corrosion coating, applied in epoxy resin coating, anti-corrosion coating, coating and other directions, can solve the problems of difficult dispersion of graphene, low graphene content, etc., and achieve simplified preparation process and process, good flexibility and impact resistance, excellent waterproof effect

Active Publication Date: 2016-06-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a graphene / epoxy resin composite anticorrosion coating with high insulation and its preparation method, solve the problem that graphene is difficult to disperse in the preparation process of insulation anticorrosion coating, and prepare high-performance, low graphene content High-barrier graphene / epoxy composite paints and coatings

Method used

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  • Graphene/epoxy resin composite anticorrosive paint with high isolation and preparation method
  • Graphene/epoxy resin composite anticorrosive paint with high isolation and preparation method
  • Graphene/epoxy resin composite anticorrosive paint with high isolation and preparation method

Examples

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Effect test

preparation example Construction

[0043] The preparation process of anticorrosion coating of the present invention is as follows:

[0044] According to the formula ratio, add epoxy resin, graphene / epoxy resin masterbatch, diluent and additives into the mixer and stir at a constant speed (300-500 rpm) for 1-3 hours, so that various materials can be mixed evenly and packed A component can be obtained. After mixing components A and B evenly in proportion, it can be used. In terms of weight percentage, component A accounts for 53-93%, and component B accounts for 7-47%. In component A, the content of graphene is in the range of 0.03-2.3wt%, preferably in the range of 0.2-1.5wt%. After being applied and dried according to conventional methods, a corrosion protective coating with high barrier properties can be prepared.

Embodiment 1

[0047] Add 500g of graphene powder prepared by the intercalation exfoliation method into 30kg of hexanol, and ultrasonically disperse for 30 minutes to obtain a transiently dispersed graphene / alcohol suspension; mix the above suspension with 10kg of epoxy resin Stir mechanically for 5 hours, with a stirring speed of 200 rpm; after stirring, let it stand for 10 minutes to separate the above mixed liquid; pour out the gray-white solution in the upper layer, leaving a black viscous slurry in the lower layer, and put it in a vacuum oven Heating to 120° C. under medium vacuum, keeping the vacuum degree in the oven lower than 100 Pa; drying for 24 hours and taking it out to obtain a graphene / epoxy resin composite masterbatch with a graphene content of about 5 wt%.

[0048] In parts by weight, the raw material composition of the composite anticorrosion coating is as follows:

[0049] The ingredients of Component A are:

[0050] 100 parts of epoxy resin;

[0051] 15 parts of 5wt% gr...

Embodiment 2

[0069] In parts by weight, the raw material composition of the composite anticorrosion coating is as follows:

[0070] The ingredients of Component A are:

[0071] 100 parts of epoxy resin;

[0072] 6 parts of 5wt% graphene / epoxy resin masterbatch;

[0073] Solvents consist of the following ingredients and proportions:

[0074] 15 parts of xylene;

[0075] 15 parts of cyclohexanone;

[0076] 15 parts of n-butanol;

[0077] Additives include the following ingredients and proportions:

[0078]

[0079] The ingredients of Part B are:

[0080] 25 parts of polyamide.

[0081] The content of graphene in the above coating is about 0.2wt%. Using the same preparation process as in Example 1 to make a composite film and coating, and to perform the same performance test, the test results similar to those in Example 1 can be obtained. It shows that the graphene / epoxy resin composite coating with high insulation can be prepared under the condition of extremely low addition amou...

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Abstract

The invention relates to the field of metal corrosion protection, in particular to a graphene/epoxy resin composite anticorrosive paint with high isolation and a preparation method. A graphene/epoxy resin masterbatch with a graphene content of 5wt% is added into common epoxy resin, then a diluent and an assistant are added and stirred to disperse uniformly to form a component A; and a component B is a curing agent. By weight percentage, the component A accounts for 53-93%, and the component B accounts for 7-47%. In the component A, the content of graphene is 0.03-2.3wt%. The two components are mixed evenly to obtain the graphene/epoxy resin composite paint, which is applied and dried by a conventional method so as to obtain a corrosion prevention coating with high isolation. Compared with the prior art, the graphene/epoxy coating prepared by the method provided by the invention consumes little graphene, also can realize uniform dispersion of graphene in the composite coating, thereby endowing the coating with the advantages of excellent water resistance, corrosion resistance, weatherability, acid-base resistance, impact resistance and artificial aging resistance, etc.

Description

technical field [0001] The invention relates to the field of metal corrosion protection, in particular to a graphene / epoxy resin composite anticorrosion coating with high insulation and a preparation method. Background technique [0002] Metal corrosion is the phenomenon that the metal surface is destroyed by the chemical or electrochemical action of the environmental medium. The most common and effective method of anti-corrosion is to coat the metal surface with an anti-corrosion coating to isolate the substrate from corrosive media such as water and oxygen. . Therefore, the barrier performance of the coating is one of the main factors to evaluate the performance of anti-corrosion coatings. Existing corrosion and anticorrosion coatings usually use polymer as the main film-forming substance, such as epoxy resin, alkyd resin, acrylic resin, etc. The crystallization defects, microcracks, pinhole structure and the induction of polar groups in polymer molecular segments formed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/08
Inventor 裴嵩峰黄坤任文才成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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