报告题目：Giantelectrorheological fluid and its potential applications

报告人：温维佳教授

香港科技大学

Abstract:Giant electrorheological (ER) fluid is a type of colloidcomprising nanoparticles suspended in the nonconducting liquid phase. Whoserheological properties can be varied through the application of an externalelectric field? Under an applied field on the order of 1-2 kV/mm, the ER fluidsexhibit solid-like behavior, e.g., ability to transmit shear stress. Thetransformation from liquid-like to solid-like behavior is relatively quick, onthe order of 1-10 milliseconds, and reversible. Such controllable variation ofthe rheological property implies a wide variety of potential applications forcontrols of micro-fluidic devices. For this purpose, we have successfullyfabricated series of new type of nanoparticles that exhibit giant ER effectwhen mixing them with compatible liquids. By using such GER fluid we havedesigned and fabricated ER fluid-based micro-fluidic components such asGER-controlled damper, micro-valve, micro-pump as well as the micro-mixer chipsetc. However, how to commercialize GER fluid for engineering products is verychallenge, while in this talk, we will introduce our experience on pushing GERfluid for industrial products and realistic applications of semi-active dampingsystem.

报告人简介：温维佳，香港科技大学教授。1982、1988年获重庆大学应用物理学士和硕士学位，1995年获中国科学院物理所凝聚态物理博士学位，1995至1999年分别在香港科技大学和美国加州大学洛杉矶分校做博士后研究。1999年加入香港科技大学。温教授研究涉及软物质结构及物理性质、巨电流变液制备与物理机制、先进功能结构材料、智能及电子材料、微流控系统和波功能材料领域.发表了260多篇SCI论文，论文引用7000多次。获得16项美国专利和15项中国专利。在国际上首先发现巨电流变现象，设计和制备的巨电流变液已应用于许多国际研究机构及全球知名公司。此项研究成果获得2014年国家自然科学二等奖。

地点：前卫南区唐敖庆楼C区603报告厅

时间：2017年5月24日（周三）下午2:00

举办单位：超硬材料国家重点实验室

物理学院

吉林省物理学会

中国物理学会高压物理专业委员会