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Silicon carbide film and preparation method thereof

A silicon carbide membrane and silicon carbide-based membrane technology, which is applied in the field of membrane separation, can solve the problems of scarcity of varieties and difficult to meet different application fields, and achieve the effects of solid material, large flux and high filtration accuracy.

Active Publication Date: 2019-03-08
浙江坚膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of technological development level, the current inorganic membranes mainly include ceramic membranes and metal membranes, which are rare and difficult to meet the needs of different application fields.

Method used

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  • Silicon carbide film and preparation method thereof

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preparation example Construction

[0022] The preparation method of the silicon carbide film provided by the invention comprises the following steps:

[0023] S1, mixing graphene with a silicon carbide precursor and a first solvent to form a first mixed solution, drying to obtain a powder, wherein the silicon carbide precursor reacts to form an intermediate product during the drying process, the powder The body is graphene modified through the intermediate product;

[0024] S2, mixing the powder with a second solvent to obtain a second mixed liquid;

[0025] S3, providing a silicon carbide base film, forming the second mixed solution on the silicon carbide base film to obtain a preform;

[0026] S4, sintering the preform to obtain a silicon carbide film comprising a graphene composite film and a silicon carbide base film, wherein the intermediate product reacts to form silicon carbide during the sintering process, and the graphene is formed by the carbonization Silicon is closely attached to the silicon carbi...

Embodiment 1

[0058] Mix and mix graphene, amino polysiloxane, and ethanol aqueous solution according to the mass ratio of 10:5:85, wherein the mass ratio of ethanol and water in the ethanol aqueous solution is 50:50, and then pass through a planetary mill filled with silicon carbide grinding balls Disperse by ball milling for 2 hours to obtain the first mixed liquid. Then put the first mixed liquid in an oven, dry it at 120° C. for 24 hours, take it out and pulverize it to form a powder.

[0059] Mix powder, carboxymethyl cellulose, polyethyleneimine, modified polydimethylsiloxane, and solvent according to the mass ratio of 5:0.05:0.1:0.02:94.83, wherein the solvent is ethanol, ammonia water and water It is mixed according to the mass ratio of 60:5:35, and then dispersed by a planetary mill filled with silicon carbide grinding balls for 16 hours, and then dispersed by ultrasonic waves for 30 minutes to obtain the second mixed solution.

[0060] Fix and seal the two ends of the silicon car...

Embodiment 2

[0063] Graphene oxide, modified polydimethylsilane, and ethanol aqueous solution are mixed and mixed according to the mass ratio of 30:20:50, wherein the mass ratio of ethanol and water in the ethanol aqueous solution is 30:70, and then filled with silicon carbide grinding balls The planetary mill was used to disperse for 10 hours to obtain the first mixed liquid. Then put the first mixed solution in an oven, dry it at 100° C. for 16 hours, take it out and pulverize it to form a powder.

[0064] Mix the powder, carboxyethyl cellulose, tetramethylammonium hydroxide, polyether siloxane, and solvent according to the mass ratio of 10:0.1:0.4:0.08:89.42, wherein the solvent is ethanol, ammonia water and water by mass Mixed at a ratio of 40:3:55, then dispersed by a planetary ball mill filled with silicon carbide grinding balls for 20 hours, and then dispersed by ultrasonic waves for 40 minutes to obtain the second mixed solution.

[0065] Fix and seal the two ends of the silicon c...

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Abstract

The invention relates to a silicon carbide film and a preparation method thereof. The preparation method comprises the following steps: mixing graphene with a silicon carbide precursor and a first solvent to form a first mixed solution, and drying, thus obtaining powder, wherein an intermediate product is formed through reacting of the silicon carbide precursor during a drying process, and the powder is graphene modified by the intermediate product; mixing the powder with a second solvent, thus obtaining a second mixed solution; providing a silicon carbide base film, and forming the second mixed solution on the silicon carbide base film, thus obtaining a preform; sintering the preform, thus obtaining the silicon carbide film comprising a graphene composite thin film and the silicon carbidebase film, wherein silicon carbide is formed through reacting of an intermediate product during a sintering process, and the graphene composite thin film is formed as the graphene is tightly attachedto the silicon carbide base film through the silicon carbide. According to the silicon carbide film and the preparation method thereof, disclosed by the invention, properties of low-pressure desalting, high-speed hydrogen absorption and the like which are difficult to achieve by an inorganic film at present can be realized by the silicon carbide film depending on microscopic quantum property of the graphene, and the demands of different fields can be met.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a silicon carbide membrane and a preparation method thereof. Background technique [0002] In today's world where energy shortages, water resources are scarce, and environmental pollution is becoming more and more serious, membrane separation technology has become a common technology to promote the development of national pillar industries, improve the living environment of human beings, and improve people's quality of life. Among them, inorganic membranes have been widely used due to their excellent properties such as high temperature resistance and acid and alkali resistance. However, due to the limitation of technological development level, the current inorganic membranes mainly include ceramic membranes and metal membranes, and the varieties are scarce, which is difficult to meet the needs of different application fields. Contents of the invention [0003] Base...

Claims

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Application Information

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IPC IPC(8): C04B35/573C04B35/622
CPCC04B35/573C04B35/62218C04B2235/425C04B2235/6562C04B2235/6567C04B2235/6581
Inventor 张志炳张云飞刘欢沈烈张达周杨
Owner 浙江坚膜科技有限公司
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