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Graphene modified polyvinyl acetate film forming agent preparation method

A polyvinyl acetate and graphene modification technology, which is applied in fiber type, fiber treatment, textile and papermaking, etc., to achieve the effect of reducing surface resistance, low reaction temperature and simple process

Active Publication Date: 2015-11-25
TAISHAN FIBERGLASS INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Rodolfo Cruz-Silva coated polyaniline (volume resistivity 10-2-102) on the surface of glass fiber, filled with epoxy resin, and improved the conductivity of composite materials. At the same time, the mechanical properties of the composite material are enhanced, and the surface resistance reaches 0.33S / cm. For example, the electroless plating technology is used to plate aluminum, nickel, silver, copper and alloys on the surface of the glass fiber, but the cost of silver plating is too high, and copper plating, The conductivity of the aluminum fiber drops sharply after being placed for a period of time or after heat treatment; the nickel-plated layer is not as easy to oxidize as the copper-plated and aluminum layers, but the conductivity is low; and the glass fiber metal plating process requires the processed glass fiber to pass through The complex process of cleaning, activation, coating, and re-cleaning has environmental protection problems. The metal coating on the surface of the fiber is easy to peel off the conductive material after friction and washing, and the wear resistance and washing resistance are poor. Can not solve the problem of large-scale preparation of conductive glass fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the preparation of graphene oxide

[0027] (1) Low-temperature reaction, add 230mL of concentrated sulfuric acid to a dry beaker one by one, place it in a low-temperature reaction bath, wait until the temperature of the concentrated sulfuric acid is around 0°C, add 10g of graphite under strong stirring, and add potassium permanganate several times 30g, control the temperature of the reaction solution at 10-15°C and stir for two hours.

[0028] (2) Medium-temperature reaction, place the beaker in step (1) in a 35°C constant temperature water bath, and continue stirring for half an hour when the temperature of the reaction solution rises to 35°C.

[0029] (3) For high-temperature reaction, add deionized water under stirring, control the reaction temperature within 100°C, continue stirring for half an hour, dilute the reaction solution by 800~1000mL with deionized water, add 5% hydrogen peroxide, and filter while it is hot. Wash with 5% hydrochloric acid a...

Embodiment 2

[0030] Embodiment 2: the preparation of graphene

[0031] The graphite oxide obtained in Example 1 was ground and sieved and mixed with deionized water, a small amount of ammonia water was added to make it weakly alkaline, ultrasonic vibration was performed for one hour, and the ratio of water added was 1mg / 1mL to obtain a brown-yellow sol-like suspension. The mass ratio of sodium borohydride to graphene oxide was 10:1, and refluxed in an oil bath at 100°C for 10 hours to obtain a black flocculent precipitate, which was left to stand and filtered, and dried at room temperature. Get graphene.

Embodiment 3

[0032] Example 3: MAH Preparation of functionalized graphene

[0033] 5.0 grams of graphene oxide or graphene obtained in Example 1 and Example 2 were dispersed in 50 mL of tetrahydrofuran or ethanol solution of 2.0 grams of aminopropyltriethoxysilane (KH550), heated to reflux for 4 hours, and then removed by distillation under reduced pressure. Tetrahydrofuran or ethanol, to obtain surface aminated graphene, and then disperse it in DMAc solution for grafting reaction with maleic anhydride to obtain maleic anhydride (MAH) functionalized graphene.

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Abstract

The present invention provides a graphene modified polyvinyl acetate film forming agent preparation method which is as follows: graphene, graphene oxide or aminated graphene amide is modified by an olefinic unsaturated monomer to obtain functional graphene, the functional graphene is dispersed into a vinyl acetate, an acrylate or an unsaturated anhydride monomer bulk solution or aqueous solution, by emulsion polymerization, to obtain a graphene modified polyvinyl acetate emulsion film forming agent, the method has the advantages of low reaction temperature, simple process, low cost, and high conductivity efficiency, the film forming agent can be used as an antistatic film-forming agent or a conductive film-forming agent, can be used for the preparation of glass fiber drawing wetting agents, fabric sizing agents, leather finishing agents, carbon fiber sizing agents, binders or coatings, and the like, can effectively reduce the material surface resistance, and can be used in antistatic or electromagnetic field shielding material fields.

Description

technical field [0001] The invention belongs to the technical field of an antistatic or conductive film-forming agent, in particular to a method for preparing a graphene-modified polyvinyl acetate film-forming agent. Background technique: [0002] Glass fiber reinforced materials (FRP) have the characteristics of low density, high strength, electrical insulation, corrosion resistance, and easy processing, and are widely used in high-tech industries such as aerospace, transportation, and instrumentation. However, due to the high surface resistivity and volume resistivity of glass fibers and resins, when friction and heat generation occur between objects, electron transfer or electromagnetic induction is excited to cause an unbalanced distribution of surface charges on the objects, resulting in static electricity accumulation. Vigorous friction will also cause corona discharge or spark discharge, causing flammable and explosive substances in the surrounding environment to cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/14C08F220/18C08F220/32C08F218/08C08F212/08C08F228/02C08F212/14C08F220/06C08F2/24D06M15/333D06M15/356D06M101/32
Inventor 刘洪刚潘春呈侯勇赵剑英倪雪庆
Owner TAISHAN FIBERGLASS INC
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