机构地区: 华南农业大学理学院应用化学系
出 处: 《应用化学》 2006年第11期1301-1303,共3页
摘 要: 研究了原位聚合法制备的炭黑/气相生长炭纤维/聚甲基丙烯酸丁酯(CB/VGCF/PBMA)复合材料的导电性和在饱和有机蒸气中的电阻响应性能。结果表明,通过加入质量分数为1%的VGCF即可使炭黑/聚甲基丙烯酸丁酯复合材料的电阻率1 040Ω.cm降至195Ω.cm,在这种三元复合体系中存在一种二阶逾渗效应;而且能使复合材料的负蒸气系数效应(NVC)强度从15.6降至2.2。 Carbon black/vapor-grown carbon fibres/poly (butyl methacrylate) (CB/VGCF/ PBMA) conductive composite was fabricated by polymerization filling. Conducting property and electrical resistance responsivity of the composite in saturated organic vapors were investigated. The experimental results indicate that 1% ( mass fraction) of VGCF was able to decrease the electrical resistivity of the composite from 1 040 Ω·cm to 195 Ω·cm, probably due to an additional percolation process. Adding small amount of VGCF into the composites notably decrease the negative vapor coefficient(NVC) intensity of the composites from 15.6 to 2.2.
关 键 词: 炭黑 气相生长炭纤维 聚合物基导电复合材料 气敏性