十六烷基三甲基溴化铵改性凹凸棒石黏土及其电流变性能（英文）

Modification of Attapulgite Clay with Cetyl Trimethyl Ammonium Bromide and Its Electrorheological Properties

采用不同浓度的十六烷基三甲基溴化铵(CTAB)对凹凸棒石黏土(ATC)进行改性,对比了施加电场前后其电流变性能的变化规律,结果表明:改性凹凸棒石黏土在电场E作用下表现出Bingham流体特性,并且屈服应力τy与E0.4成正比;65℃是电流变性能突变的临界温度;通过介电性能的测试,发现CTAB对电流变响应的贡献较大。60 d后,改性凹凸棒石黏土的悬浮率仍可达到91%。

The electrorheological effect of cetyl trimethyl ammonium bromide （CTAB） modified attapulgite clay （ATC） in the absence and presence of electric field E was investigated. The results show that the ATC modified with CTAB appears the Bingham fluid behavior, and the yield stress τy, is proportional to E0.4. The critical temperature on the ER response is 65 ℃. The ER response mechanism is supposed based on the results of dielectric constant, and the CTAB is mainly contributed to the ER response. The clay suspension with the concentration of 91% after the modification with CTAB is still stable after 60 d.