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Preparation method and application of graphene oxide/silicon dioxide/polyaniline composite material

A technology of silicon dioxide and composite materials, which is applied in the field of preparation and application of graphene oxide/silicon dioxide/polyaniline composite materials, can solve the problem of low performance of graphene oxide, and achieve good electrical conductivity, high electrical conductivity and Strength, simple effect of preparation method

Active Publication Date: 2014-12-24
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Modification of graphene oxide through non-covalent functionalization to solve the technical problem of low performance of graphene oxide prepared by the existing covalent functionalization method when used as a filler

Method used

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  • Preparation method and application of graphene oxide/silicon dioxide/polyaniline composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 288mL graphene oxide water dispersion (containing graphene oxide 0.288g, water 288g, 16mol), 5g tetraethyl orthosilicate (2.4×10 -2mol) were mixed evenly, and sodium hydroxide was added to make the pH of the mixed solution 12, stirred and reacted at 15° C. for 12 hours, filtered, washed, and dried to obtain a graphene oxide / silicon dioxide composite material.

[0026] (2) Disperse the product of step (1) in ethylene glycol, add 1.152g aniline (1.24×10 -2 mol), 0.633g concentrated sulfuric acid (6.2×10 -3 mol after stirring evenly, add 5.659g ammonium persulfate (2.48×10 -2 mol) was stirred and reacted at 0°C (ice-water bath) for 4 hours, filtered, washed, and dried to obtain a graphene oxide / silicon dioxide / polyaniline composite material.

[0027] In the composite material obtained in Example 1, the conversion rate of tetraethyl orthosilicate and aniline is approximately equal to 100%, the quality of graphene oxide in the product is about 0.288g, the quality of s...

Embodiment 2

[0029] (1) Mix 6000mL of graphene oxide ethanol dispersion (containing 6g of graphene oxide), 12.195g of sodium silicate (0.1mol), 50g of water (2.8mol) in a reaction vessel, and add 8.719g of nitric acid (0.2mol ) make the mixed solution acidic, stir and react at 80° C. for 10 minutes, filter, wash and dry to obtain the graphene oxide / silicon dioxide composite material.

[0030] (2) Disperse the product of step (1) in isopropanol, add 8g aniline (8.59×10 -2 mol), 33.935g concentrated hydrochloric acid (0.344mol, after stirring evenly, add 3.738g manganese dioxide (4.30×10 -2 mol) was stirred and reacted at 50° C. for 10 minutes, filtered, washed, and dried to obtain a graphene oxide / silica / polyaniline composite material.

[0031] The conversion rate of sodium silicate and aniline in the composite material obtained in Example 2 is approximately equal to 100%, the quality of graphene oxide in the product is about 6g, the quality of silicon dioxide is about 6g, and the quality ...

Embodiment 3

[0033] (1) In a reaction vessel, 1397mL graphene oxide N,N-dimethylformamide dispersion (containing graphene oxide 1.397g), 0.9313g aniline (0.01mol), 1.722g p-toluenesulfonic acid (0.01mol ) and mix evenly, add 1.133g of 30% hydrogen peroxide (0.01mol) and stir at 5°C for 4 hours, centrifuge, wash and dry to obtain a graphene oxide / polyaniline composite material.

[0034] (2) Disperse the product of (1) into 200mL ethanol, add 5.909g tetramethyl orthosilicate (3.88×10 -2 mol), 10g water (0.556mol), 15.8g sulfuric acid (0.155mol) to make the mixed solution acidic, stirred and reacted at 10°C for 12 hours, filtered, washed and dried to obtain graphene oxide / silicon dioxide / polyaniline composite material.

[0035] The conversion ratio of tetramethyl orthosilicate and aniline in the composite material obtained in this embodiment 3 is approximately equal to 100%, and the quality of graphene oxide in the product is about: 1.397g, the quality of silicon dioxide is about 2.328g, and ...

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Abstract

The invention belongs to the cross field of an organic / inorganic nanometer compound and a functional high-molecular material, and provides a preparation method and application of a graphene oxide / silicon dioxide / polyaniline composite material, aiming at solving the problems that the effect of promoting the property of a polymer and final using effect are influenced by reducing the self mechanical strength, electricity-conducting property, heat-conducting property and the like of graphene oxide due to the structural change of a carbon atom contained in graphene oxide. The graphene oxide / silicon dioxide / polyaniline composite material comprises the following three components in percentage by mass: 5%-90% of graphene oxide, 5%-90% of silicon dioxide and 5%-90% of polyaniline. According to the preparation method provided by the invention, the technical problem that graphene oxide prepared through the traditional covalent functionalization method is not high in property when used as a filler is solved by modifying graphene oxide through non-covalent functionalization effect.

Description

technical field [0001] The invention belongs to the intersecting field of organic / inorganic nanocomposites and functional polymer materials, and specifically relates to a preparation method and application of a graphene oxide / silicon dioxide / polyaniline composite material with dual functions of conduction and reinforcement. Background technique [0002] In the silicone polymer chemical industry, fillers are the most used additives, and most silicone products (including silicone rubber, silicone oil and silicone resin) use a large amount of fillers. For example, adding conductive carbon black, graphite, and metal as fillers in the manufacture of conductive silicone rubber can improve the conductivity and heat resistance of the product; when silicone polymers are used as coatings, adding white or colored fillers (such as titanium dioxide, talcum powder , barium sulfate, etc.) can improve the optical, physical and chemical properties of the coating; adding silicon dioxide, calc...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08K3/04C08K3/36
Inventor 王华兰邬继荣张国栋伍川蒋剑雄来国桥
Owner HANGZHOU NORMAL UNIVERSITY
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