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Modified graphene and paint containing modified graphene

A technology of graphene and graphene dispersion liquid, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of graphene dispersion, short storage time of coatings, poor dispersion, etc., and achieve strong interface bonding , long service life, good anti-corrosion performance

Inactive Publication Date: 2017-03-22
ANHUI YINENG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] We know that graphene materials are neither hydrophilic nor lipophilic, so they are poorly dispersed in oily epoxy systems, and the prepared coatings have a short shelf life. Among the above two technical solutions, one directly uses nano-graphene fragments, and the other uses It is a modified graphene slurry, which cannot solve the problem of graphene dispersion

Method used

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  • Modified graphene and paint containing modified graphene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A modified graphene is prepared by the following method:

[0030] (1) Graphene oxide is added in the organic solvent, the concentration of the mixture that described graphene oxide and organic solvent forms is 3mg / g, after ultrasonic dispersion treatment, then add glucose, polyvinylpyrrolidone and silane coupling agent (silane coupling agent kh550, the same below), stirred for 10 minutes to obtain the primary mixture;

[0031] (2) Use an organic solvent to centrifugally wash the initial mixture. The specific process is: first place the initial mixture at 8000rpm and centrifuge for 5 minutes, pour off the supernatant, then add an organic solvent, stir evenly, and then place it in an 8000rpm Centrifuge for 5 minutes under the conditions, then pour off the supernatant, and the remaining solid matter is the modified graphene;

[0032] The mass ratio of described glucose and graphene oxide is 1.3:1, the mass ratio of described polyvinylpyrrolidone and graphene oxide is 3:1,...

Embodiment 2

[0035] A modified graphene is prepared by the following method:

[0036] (1) Graphene oxide is added to the organic solvent, the concentration of the mixture formed by the graphene oxide and the organic solvent is 0.5mg / g, after ultrasonic dispersion treatment, then add glucose, polyvinylpyrrolidone and silane coupling agent, stirred for 15 minutes to obtain the initial mixed liquid;

[0037] (2) Use an organic solvent to centrifugally wash the initial mixture. The specific process is: first place the initial mixture at 5000rpm and centrifuge for 10min, pour off the supernatant, then add an organic solvent, stir evenly, and then place it in a 5000rpm Centrifuge for 10min under the conditions, then pour off the supernatant, and the remaining solid matter is the modified graphene;

[0038] The mass ratio of described glucose and graphene oxide is 1:1, the mass ratio of described polyvinylpyrrolidone and graphene oxide is 2:1, and the mass ratio of described silane coupling agen...

Embodiment 3

[0041] A modified graphene is prepared by the following method:

[0042] (1) Graphene oxide is added in the organic solvent, the concentration of the mixture that described graphene oxide and organic solvent forms is 5mg / g, after ultrasonic dispersion treatment, then add glucose, polyvinylpyrrolidone and silane coupling agent , stirred for 20 minutes to obtain the primary mixture;

[0043] (2) Use an organic solvent to centrifugally wash the initial mixture. The specific process is: first place the initial mixture at 10,000 rpm for 7 minutes, pour off the supernatant, then add an organic solvent, stir evenly, and then place it in a 10,000-rpm Centrifuge for 7min under the conditions, then pour off the supernatant, and the remaining solid matter is the modified graphene;

[0044]The mass ratio of described glucose and graphene oxide is 1.5:1, the mass ratio of described polyvinylpyrrolidone and graphene oxide is 4:1, and the mass ratio of described silane coupling agent and gr...

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Abstract

The invention discloses modified graphene. A preparation method of the modified graphene comprises (1) adding graphene oxide into an organic solvent, carrying out ultrasonic dispersion treatment, adding glucose, polyvinylpyrrolidone and a silane coupling agent into the dispersion liquid, and stirring the mixture for 10 to 20 minutes to obtain an initial mixed solution, and (2) carrying out centrifuging washing on the initial mixed solution through an organic solvent to obtain residual solids which are modified graphene. Through modification of the graphene oxide, the hydrophilic groups such as a carboxyl group and a hydroxyl group react to be removed so that lipophilic properties are enhanced. Through use of a non-aqueous solvent in the reaction, interface bonding strength of the modified graphene and organic solvent is improved. The modified graphene can be easily dispersed in an oily coating system and the improvement of the dispersibility is conducive to improvement of the anticorrosive performances of the paint.

Description

technical field [0001] The invention relates to the field of graphene and coatings, in particular to a modified graphene and a coating containing the modified graphene. Background technique [0002] With the advancement of industrialization, metal corrosion has increasingly become an economic problem that countries pay attention to. The global pollution loss caused by metal corrosion is as high as hundreds of billions of yuan every year. The demand in the global anti-corrosion coatings market is growing rapidly, especially in the fields of transportation, oil and gas pipelines, industrial fields, and highways. Corrosion of marine ships accounts for a large part. Ship corrosion causes a lot of waste to the hull and becomes a potential safety hazard. [0003] Graphene, as a new type of two-dimensional single-layer carbon material, can significantly improve the anti-corrosion performance when added to anti-corrosion coatings. Sheet-like graphene has a large specific surface a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/10C09C1/46C09C3/00C09C3/08C09C3/10C09C3/12
CPCC09D163/00C08K3/04C08K3/08C08K9/04C08K9/06C08K2003/0893C09C1/46C09C3/006C09C3/08C09C3/10C09C3/12C09D5/106C09D7/62
Inventor 胡琪卉敖非张晓玉童磊
Owner ANHUI YINENG NEW MATERIAL TECH CO LTD
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