Amorphous polystyrene base gas sensitive conductive composite material and preparation method thereof

A conductive composite material, polystyrene-based technology, applied in the field of amorphous polystyrene-based gas-sensitive conductive composite material and its preparation, to achieve high reusability, high sensitivity, and high stability

Inactive Publication Date: 2007-06-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, gas-sensitive conductive composites based on pure amorphous polymers have rarely been reported.

Method used

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  • Amorphous polystyrene base gas sensitive conductive composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The group distribution of Examples 1-7 is shown in Table 1. The specific steps of the preparation method are as follows:

[0025] ① Add a certain amount of newly treated styrene monomer and 0.6wt% initiator to the reactor, and stir until the initiator is completely dissolved by nitrogen;

[0026] ②Add conductive fillers with a mass fraction of 8.5wt% to 21.4wt% according to the calculated amount, stir with nitrogen for 10 minutes, and then raise the temperature to 85°C for 4 hours and 150°C for 2 hours;

[0027] ③Cool down to 80℃, add an appropriate amount of good polystyrene solvent and continue to stir for 1h, then cool to room temperature;

[0028] ④ Coat the obtained sticky substance on the self-made glass electrode plate, dry it and vacuum-dry it at room temperature for 48 hours to obtain a composite electrode.

[0029] Comparative Examples 1-7 are prepared by blending industrial polystyrene and conductive filler using methyl ethyl ketone as a solvent solution.

[0030...

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Abstract

The present invention relates to an electroconductive high-molecular composite material composition which has gas-sensing response characteristics and its made by using amorphous polystyrene matrix filled up with electroconductive filler and its preparation method. Said material is made up by using amorphous polystyrene as matrix and combining it with electroconductive filler, and has higher gas-sensing response characteristics for organic solvent steam having a certain compatibility with said matrix, so that when it is met with several organic solvent gases, the electric resistance of said composite material can be quickly changed.

Description

Technical field [0001] The invention relates to a composition and a manufacturing method for preparing a conductive polymer composite material with high gas sensitivity by filling an amorphous polystyrene matrix with a conductive filler. Background technique [0002] The gas-sensitive conductive polymer composite material formed by filling the polymer matrix with conductive fillers (such as carbon black, etc.) has the characteristics of adjustable conductivity in a large range, easy molding and processing, low cost and high gas-sensitive response. . Its working principle is that in some organic solvent vapors, the matrix polymer of the composite material swells or partially dissolves, which causes the distance between the conductive fillers in close contact to increase, and the macroscopic manifestation is an increase in the resistance of the composite material. At present, the matrix used in polymer-based gas-sensitive conductive composite materials is mostly crystalline or semi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/22C08F2/44C08L25/08
CPCY02P20/582
Inventor 章明秋李军荣许家瑞容敏智
Owner SUN YAT SEN UNIV
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