Responsibility of electric resistance of polyethyleneimine-grafted carbon black against alcohol vapor and humidity
Responsibility of electric resistance of polyethyleneimine-grafted carbon black against alcohol vapor and humidity
复制标题
聚乙烯亚胺接枝炭黑的电阻对酒精蒸汽和湿度的影响
DOI：
10.1007/s002890050141
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发表时间：
1997
期刊：
影响因子：
3.2
通讯作者：
K. Saitoh
中科院分区：
文献类型：
--
作者：
N. Tsubokawa;Sachio Yoshikawa;Kiyotaka Maruyama;Tomoaki Ogasawara;K. Saitoh
以N，N′-二环己基碳化二亚胺为缩合剂，通过聚乙烯亚胺（PEI）的亚氨基与炭黑表面的羧基直接缩合，成功地将结晶聚乙烯亚胺（PEI（C））接枝到炭黑表面。在甲醇、乙醇和水蒸气中，PEI（C）和PEI（C）接枝炭黑制备的复合材料的电阻急剧增加，达到初始电阻的103- 104倍。在正己烷和甲苯蒸气中，复合材料的电阻几乎没有变化。这些结果表明，PEI的结晶结构的轻微变化的检测的可能性，通过溶剂的吸收作为复合材料的电阻的大的增加。
Crystalline polyethyleneimine (PEI(C)) was successfully grafted onto carbon black surface by direct condensation of imino groups of PEI with carboxyl groups on the surface usingN,N′-dicyclohexylcarbodiimide as a condensing agent. The electric resistance of a composite prepared from PEI(C) and PEI(C)-grafted carbon black drastically increased to 103–104times of initial resistance in methanol, ethanol, and water vapor. But the change of electric resistance of the composite hardly observed in hexane and toluene vapor. These results suggest the possibility of detection of a slight change of crystalline structure of PEI by the absorption of solvent as a large increase of electric resistance of the composite.