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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 the effects of reduced percolation value, high sensitivity, and high stability

Inactive Publication Date: 2005-10-26
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
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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

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Embodiment Construction

[0024] The composition ratio of Examples 1-7 is shown in Table 1, and the specific steps of its preparation method are as follows:

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

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

[0027] ③ Cool down to 80°C, add an appropriate amount of polystyrene good solvent and continue stirring for 1 hour, then cool to room temperature;

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

[0029] Comparative examples 1 to 7 are prepared by blending industrial polystyrene and conductive filler with met...

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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 conductive polymer composite materials with high gas-sensitivity properties by using conductive fillers to fill an amorphous polystyrene matrix. Background technique [0002] The gas-sensitive conductive polymer composite material composed of conductive filler (such as carbon black, etc.) filling the polymer matrix has the characteristics of adjustable conductivity in a wide range, easy molding and processing, low cost and high gas sensitivity. . Its working principle is that in some organic solvent vapor, the matrix polymer of the composite material is swollen or partially dissolved, which causes the distance between the conductive fillers in close contact to increase, and the macroscopic performance of the composite material increases in resistance. At present, the matrix used for polymer-based gas-sensitive conductive composite materials is mostly crystalline or semi-cr...

Claims

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Application Information

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IPC IPC(8): C08L25/08
CPCY02P20/582
Inventor 章明秋李军荣许家瑞容敏智
Owner SUN YAT SEN UNIV
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