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Graphene and nano-titanium dioxide composite coating and its preparation method and application

A nano-titanium dioxide and composite coating technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings and other directions, can solve the problem of not being able to combine excellent properties, and achieve excellent anti-corrosion properties, easy control of operating conditions, and prolonged service life.

Active Publication Date: 2022-04-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

All of the above use titanium dioxide or graphene alone, and cannot effectively combine the excellent properties of the two

Method used

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  • Graphene and nano-titanium dioxide composite coating and its preparation method and application

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preparation example Construction

[0015] The preparation method of Graphene provided by the invention and nano-titanium dioxide composite coating (hereinafter also referred to as composite coating) comprises the following steps,

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

[0017] 2) adding modified nano titanium dioxide to the mixture obtained in step 1) and grinding;

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

[0019] Wherein, the redispersed graphene powder is a powder obtained by drying the dispersion liquid after graphene is dispersed by using graphene as a raw material and using polyaniline oligomer and polyvinylpyrrolidone as a dispersant; The modified nano-titanium dioxide is a powder obtained by loading nano-titanium dioxide on titanium dioxide, and the particle size of the titanium dioxide is 8-100 μm.

[0020] Preferably, the amount of the redispersible graphene powder is such ...

Embodiment 1

[0069] 1) Preparation of redispersible graphene powder

[0070] 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;

[0071] After the graphene mixture 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 to obtain a uniformly dispersed graphene dispersion. Among them, the conditions for ultrasonic dispersion Both: the power is 500W, the time is 2 hours, the conditions of centrifugation are: the speed is 150...

Embodiment 2

[0078] 1) Preparation of redispersible graphene powder

[0079] 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;

[0080] After the graphene mixture 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 to obtain a uniformly dispersed graphene dispersion. Among them, the conditions for ultrasonic dispersion Both: the power is 500W, the time is 2 hours, the conditions of centrifugation are: the speed is 15000 rp...

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Abstract

The invention relates to the field of anti-corrosion coatings, and discloses a composite coating of graphene and nano-titanium dioxide, a preparation method and application thereof. The preparation method of the composite coating of the present invention comprises: 1) the step of mixing redispersible graphene powder and part of the film-forming resin to obtain a mixture; 2) adding modified nano titanium dioxide to the mixture obtained in step 1) and grinding 3) adding the remaining film-forming resin to the ground product and mixing. According to the preparation method of the present invention, the process is simple, the dispersibility of graphene and nano-titanium dioxide is good, the operating conditions are easy to control, and the obtained coating has excellent anti-corrosion performance, which is especially suitable for external anti-corrosion in marine environments, and can significantly prolong the service life of equipment in marine environments. service life.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a composite coating of graphene and nano-titanium dioxide and its preparation method and application. Background technique [0002] At present, many chemical equipment in our country are located in coastal areas, and the coastal marine and atmospheric environment is highly corrosive, resulting in short service life and poor weather resistance of external anti-corrosion coatings used in coastal areas. With the increasing safety requirements for chemical equipment, there is an urgent need for high-performance external anti-corrosion coatings. With the emergence of the new material graphene, its excellent properties such as barrier and wear resistance can be used to prepare high-performance heavy-duty anti-corrosion coatings. In addition, the chemical properties of nano-titanium dioxide are stable and resistant to oxidation. Under the conditions of external light and water, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/61C09D7/62C09D5/08C09D163/00
CPCC09D7/61C09D7/62C09D5/08C09D163/00C08K2003/2241C08K2201/011C08L63/00C08K9/08C08K3/22C08K3/042
Inventor 程庆利甄永乾王林张玉平管孝瑞陶彬刘全桢贾鹏林
Owner CHINA PETROLEUM & CHEM CORP
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