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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%。
Different Cetyltrimethylammonium Bromide (CTAB) was used to modify attapulgite clay (ATC). The change law of ER was compared before and after the application of electric field. The results showed that the modified attapulgite Clay exhibits Bingham fluid properties under the action of electric field E, and the yield stress τy is proportional to E0.4; 65 ℃ is the critical temperature at which the electrorheological property abruptly changes; through the test of dielectric properties, the contribution of CTAB to the current response is found Big. After 60 days, the modified attapulgite clay suspension rate can still reach 91%.