甲壳质悬浮液的电流变效应的研究

STUDY OF ELECTRORHEOLOGICAL EFFECT OF CHITIN SUSPENSIONS

以甲壳质为悬浮颗粒，以硅油为分散介质、丙三醇为活化剂，制得悬浮液。并研究了该悬浮液的电流变效应及其影响因素，如电场强度、剪切速率、活化剂用量等。同时探讨了悬浮体系的漏电流密度及其影响因素。实验结果表明，活化剂的最佳用量约为５％（质量）；随着电场强度、颗粒浓度的提高，体系的电流变效应增大；而随剪切速率的增大，体系的电流变效应减弱。体系的漏电流密度随电场强度及颗粒浓度的增大而增大，随剪切速率的增大而减小。

Electrorheological suspensions have been recognized to have great potential in the fields of hydraulics, robotics and automotive applications. The waterfree electrorheological suspension was prepared by using silicone oil as dispersing medium, chitin as the dispersed particles and glycerin as activator. The electrorheological effect and current density of the suspension was experimentally investigated by using a concentric cylinder rheometer. The results show that, the optimum amount of the adsorbed glycerin is about 5 mass%. The suspension′s electrorheological effect increases significantly with the increasing field strength and particle concentration, decreases with the increasing shear rate. The suspension′s current density also increases with the increasing field strength and particle concentration, and decreases with the shear rate.