采用溶胶-凝胶法制备了一种新型高岭土/二氧化钛纳米复合电流变液材料.XRD、FT-IR、SEM分析表明TiO2以纳米晶的形态包覆于高岭土表面.电流变性能测试表明,不同的TiO2质量比的复合颗粒电流变液效应不同,且都比纯高岭土电流变有显著提高.同时当复合颗粒中TiO2质量百分比在34％,颗粒硅油体积分数为25％,直流电场为3kV/mm时,高岭土/二氧化钛纳米复合材料电流变液的静屈服应力达3.4kPa,是纯高岭土电流变液的5倍.
Kaolinite/TiO2 nanocomposite particles were prepared by sol-gel technique. The analysis of XRD,FT-IR and SEM shows that the surface of kaolinite is coated by nano-TiO2 crystal. Furthermore the electrorheological effect is associated with the TiO2 mass percent in the nanocomposite particle. When the content of TiO2 in the composite is 34%, E=3kV/mm, and volume fraction is 25%, the yield stress of kaolinite/TiO2 nanocomposite ERF is 3.4 kPa, which is 5 times of that of kaolinite.
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