Conductive polymer composites serving as gas sensors

被引：2

作者：

Zhang, Ming Qiu ^{[1
]}

Rong, Min Zhi ^{[1
]}

Chen, Shi Guo ^{[1
]}

机构：

[1] Zhongshan Univ, Inst Mat Sci, Key Lab Polymer Composite & Funct Mat, Minist Educ, Guangzhou 510275, Peoples R China

来源：

ADVANCES IN COMPOSITE MATERIALS AND STRUCTURES, PTS 1 AND 2 | 2007年 / 334-335卷

关键词：

carbon black; gas sensor; mixing; diffusion; electrical properties;

D O I：

10.4028/www.scientific.net/KEM.334-335.561

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present work synthesized conductive composites consisting of waterborne polyurethane (WPU) and carbon black (CB). Besides the low percolation threshold (0.7-0.95wt%), the composites are quite sensitive to organic solvent vapors regardless of their polarities as characterized by the drastic changes in conductivity. In the case of polar solvents, negative and positive vapor coefficient phenomena of the composites were successively observed with a rise in CB content. It was found that different mechanisms are responsible for the broad applicability of the composites as candidates for gas sensing materials owing to the different interactions among the matrix polymer, the filler particles and the solvent molecules.

引用

页码：561 / +

页数：2

共 7 条

[1] A novel gas sensor from polymer-grarfted carbon black: Effects of polymer, crystalline organic compound, and carbon black on electric response to tetrahydrofuran vapor [J].