PVA/CB复合材料气敏性能研究

以聚乙烯醇为基体,以炭黑为导电性添加剂,通过共混法制得常温响应聚乙烯醇/炭黑(PVA/CB)气敏导电薄膜,研究了复合薄膜材料在乙醇蒸气中的室温气敏性能。研究结果表明,PVA/CB复合材料的气敏性能跟炭黑的分散性、含量、材料的厚度等因素有关。炭黑分散性越好,气敏性越好;炭黑含量存在一最佳值;材料厚度增加,阻碍气体的扩散导致气敏性降低。

Study onthe gas sensitive Performance of PVA/CB composite Film

In this paper,a gas sensitive PVA/CB composite film was fabricated by using PVA as the matrix and carbon black as the conducting fillers.The gas sensitivity of the composite film in the alcohol vapor was explored at room temperature.The results shows that the gas sensitivity of PVA/CB composite is influenced by carbon black dispersion,content,and material thickness.Good carbon black dispersion favors the sensitive of the composite.There is a best value of additive of carbon.The diffusion of the gas is hampered with increasing of the thickness of the composite.