复合材料的超微粒子在电流变液体中的应用

目的得到一种能够满足工程应用要求的高性能电流变液体，方法用微乳液法得到一种复合材料的超微粒子并作为分散相与硅油混合，得到3种不同体积分数的电流变液体，分别测试其在不同温度、电场强度、剪切率下电致应力和表观粘度的变化规律，结果大量的系统测试表明，用超微粒子制成的体积分数为30％的这种新型电流变液体具有明显的电流变效应，结论双电层极化对液体的电流变效应具有重要影响。

Application of Composite Ultrafine Particles in ER Fluids

Aim To obtain a kind of electrorheological (ER) flind with high comprehensive properties in order to satisfy the needs of engineering application. Methods A new type of dispersed phase── composite ultrafine particles (UFP) was obtained by the method of microemulsion, which was used to mix with silicon oil. aam electroinduced stress and apparent viscosity of the ER fluids with three different volume fractions were tested under the conditions of different temperatures, electric fields and shear rates. Results A series of systematic tests show that the new type of ER fluids with volume fraction of 30% possesses obvious ER effect. Conclusion The double layers polarization plays an important role in ER effect.