Graphene insulating coating and its preparation method and application

An insulating coating and graphene technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as inapplicability, and achieve the effects of control of operating conditions, simple process and excellent performance

Active Publication Date: 2022-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The graphene coatings prepared in these two schemes have conductive properties and are not suitable for places where insulating coatings are used

Method used

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  • Graphene insulating coating and its preparation method and application

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preparation example Construction

[0015] The preparation method of graphene insulating paint provided by the invention (hereinafter also referred to as insulating paint) comprises the following steps,

[0016] 1) The step of mixing the redispersible graphene powder, the redispersible graphene oxide powder and part of the film-forming resin to obtain the mixture;

[0017] 2) The step of grinding the mixture obtained in step 1);

[0018] 3) adding the remaining film-forming resin to the ground product and mixing,

[0019] Wherein, the redispersible graphene powder is obtained by first drying the dispersion liquid after dispersing graphene with graphene as raw material and polyaniline oligomer and polyvinylpyrrolidone as the first dispersant Powder; the redispersible graphene oxide powder is obtained after the second drying of the dispersion liquid after dispersing graphene oxide with graphene oxide as raw material and polyaniline oligomer as the second dispersant Powder; the weight ratio of the redispersible g...

Embodiment 1

[0068] 1) Preparation of redispersible graphene powder

[0069] 1 part by weight of graphene (purchased in Changzhou Sixth Element Materials Technology Co., Ltd., 5 layers of graphene, particle size is 10-55 μm) and 10 parts by weight of polyaniline oligomer (purchased in Shandong Baihong New Material Co., Ltd., the average molecular weight is 7000) and polyvinylpyrrolidone (purchased from Shanghai Xinyu Biotechnology Co., Ltd., the average molecular weight is 10000) mixed (the weight ratio of polyaniline oligomer and polyvinylpyrrolidone is 1:2) , to obtain a graphene mixture;

[0070] After the graphene mixed solution is ultrasonically dispersed, it is filtered at 25° C. for 30 minutes to obtain a filtrate, and the filtrate is ultrasonically dispersed again and then centrifuged, and the centrifuged supernatant is taken to obtain a uniformly dispersed graphene dispersion. Among them, the conditions of ultrasonic dispersion are: the power is 500W, the time is 2 hours, the con...

Embodiment 2

[0079] 1) Preparation of redispersible graphene powder

[0080] 1 weight part of graphene (purchased in Changzhou Sixth Element Materials Technology Co., Ltd., 5 layers of graphene, particle size is 10-55 μm) and 20 weight parts of polyaniline oligomer (purchased in Shandong Baihong New Material Co., Ltd., the average molecular weight is 9000) and polyvinylpyrrolidone (purchased from Shanghai Xinyu Biotechnology Co., Ltd., the average molecular weight is 10000) mixed (the weight ratio of polyaniline oligomer and polyvinylpyrrolidone is 1:10) , to obtain a graphene mixture;

[0081] After the graphene mixed solution is ultrasonically dispersed, it is filtered at 25° C. for 30 minutes to obtain the filtrate, and the filtrate is ultrasonically dispersed again and then centrifuged, and the centrifuged supernatant is taken to obtain a uniformly dispersed graphene dispersion. Among them, the conditions of ultrasonic dispersion are: the power is 500W, the time is 2 hours, the condit...

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Abstract

The invention relates to the field of anti-corrosion coatings, and discloses a graphene insulating coating and its preparation method and application. The preparation method of the graphene insulating coating of the present invention comprises: 1) redispersible graphene powder, redispersible graphite oxide 2) the step of grinding the mixture obtained in step 1); 3) the step of adding the remaining film-forming resin to the ground product and mixing, wherein , the weight ratio of the redispersible graphene powder to the redispersible graphene oxide powder is 1:3-50. According to the preparation method of the present invention, the process is simple, the dispersibility of graphene is good, and the operating conditions are easy to control. The obtained graphene insulating coating has excellent performance, and is especially suitable for insulating high-performance heavy-duty anti-corrosion coatings under relatively harsh corrosive environments, effectively solving the problem of graphite Solving the problem of electrostatic conductivity of vinyl coatings is conducive to promoting the application and development of high-performance insulating heavy-duty anti-corrosion coatings.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a graphene insulating coating and its preparation method and application. Background technique [0002] In order to ensure the continuous supply of oil, a large number of large crude oil storage tanks are needed. With the increase of the number and scale of storage tanks, their safety issues become more and more important. Corrosion is one of the important factors affecting the safety of storage tanks. It often causes storage tanks to fail due to corrosion and perforation during the service period, resulting in oil leakage and other accidents. Although people design different kinds of coatings to protect the bottom plate of storage tanks, the problem of oil leakage caused by corrosion is still constantly exposed. [0003] CN105802452A discloses a preparation method of graphene insulating paint, which is mainly an anti-corrosion paint made by dispersing graphene in resin. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/61C09D5/25C09D5/08C09D7/65
CPCC09D163/00C09D7/61C09D5/00C09D5/08C09D7/65C08L2205/025C08L2205/035C08L63/00C08L79/02C08L39/06C08K3/042
Inventor 程庆利赵海超甄永乾张玉平管孝瑞陶彬刘全桢
Owner CHINA PETROLEUM & CHEM CORP
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