研究了聚甲基丙烯酸丁酯/炭黑(PBMA/CB)复合材料在空气中低浓度有机蒸气检测方面的应用.结果表明,在相同蒸气浓度时,复合材料对乙酸乙酯和甲苯蒸气的电阻响应灵敏度更高,这是因为复合材料对有机蒸气的气敏响应性能不仅与聚合物基体和有机溶剂间的相溶性有关,而且与有机蒸气分压有关.复合材料的电阻响应程度随有机蒸气分压的变化与Ⅲ型吸附曲线相似.另外,通过改变发黑的质量分数、测试温度等,可以有效地改善复合材料对空气中低浓度有机蒸气的电阻响应性能.
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