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Preparation method of graphene/polystyrene conductive composite material

A conductive composite material and polystyrene technology are applied in the field of preparation of graphene/polystyrene conductive composite materials to achieve the effects of high electrical conductivity, improved thermal stability and low conductive percolation value

Inactive Publication Date: 2015-05-27
何源
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Problems solved by technology

However, these studies are mainly limited to graphene-based inorganic hybrid materials. In view of the high viscosity of polymers, there are still relatively few studies on the construction of high-dimensional graphene assemblies in polymers.

Method used

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Experimental program
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Embodiment Construction

[0019] A kind of preparation method of graphene / polystyrene conductive composite material, adopts following steps:

[0020] Step 1: Preparation of graphene oxide (GO) powder:

[0021] Slowly add 200mL of concentrated sulfuric acid to a beaker containing 8.0g of graphite, stir magnetically in an ice-water bath for 10min, add 24.0g of potassium permanganate, and stir for 1h; then, transfer the beaker to a water bath at 30°C, stir for a medium-temperature reaction for 10h ; add 200mL H 2 O, stirred for 30min to complete the high temperature reaction; add 600mL H 2 O and 27mL H 2 o 2 , stirred and cooled to room temperature, centrifuged with HCl, washed to remove SO 2 4- Plasma; Finally, the mixture was subjected to H 2 O washing, ultrasonic stripping, centrifugation and freeze-drying yielded brown GO powder.

[0022] Step 2: Preparation of cationic polystyrene (PS) by dispersion polymerization + )Microspheres:

[0023] To equipped with stirring rod, condenser t...

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Abstract

The invention aims at providing a preparation method of a graphene / polystyrene conductive composite material. The preparation method of the graphene / polystyrene conductive composite material comprises the following steps: (1) preparing graphene oxide (GO) powder; 2 dispersing and polymerizing to prepare cationic polystyrene (PS<+>) microspheres; and 3 preparing a GNS / PS composite material. The preparation method is capable of inhibiting auto-agglutination and induction of GNs and graphene is selectively distributed on a polymer particle surface to form a complete graphene three-dimensional network skeleton. A channel of free electron conduction is formed by a three-dimensional structure of which GNs is relatively ordered. The GNs / PS composite material shows relatively low conductivity thresholds and relatively high electric conductivity; the thermal stability of PS is improved by addition of the graphene; and the PS decomposition temperature is improved by 13.5 DEG C. A new idea is provided for construction of an ordered inorganic filler micro-structure employing a high-viscosity polymer system by a simple and convenient method; and further expansion of the application field of a graphene-based conductive composite material is facilitated.

Description

technical field [0001] The invention relates to the technical field of material chemical preparation, in particular to a preparation method of a graphene / polystyrene conductive composite material. Background technique [0002] As a new type of carbon-based material, graphene has attracted extensive research in scientific and application fields due to its unique two-dimensional structure, good chemical stability, and excellent mechanical, optical, thermal, and electrical properties, and is considered to be the next-generation material. A generation of the most ideal structural and functional reinforcement materials. In recent years, the research on adding graphene nanosheets (GNs) as a conductive medium to polymers to prepare conductive composites has made rapid progress, and graphene-based conductive composites are also widely used in antistatic, sensors, capacitors, etc. field. [0003] The performance of graphene-based conductive composites not only depends on the de...

Claims

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Application Information

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IPC IPC(8): C08L51/00C08K9/02C08K3/04C08F257/02C08F220/34
Inventor 何源
Owner 何源
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