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【创源大讲堂】Bio-inspired Design of Stimuli Responsive Materials Based on a Bilayer Structure报告通知
作者:杨卓然   日期:2017-07-04     点击数:58  

西南交通大学“创源”大讲堂研究生学术讲座

讲座时间:2017年7月5日(周三)上午 9:30

讲座地点:九里校区 行政楼二楼 学术报告厅

主 讲 人:Professor Luyi Sun (University of Connecticut)

题目:Bio-inspired Design of Stimuli Responsive Materials Based on a Bilayer Structure
 

简    历:Dr. Luyi Sun is Castleman Professor in Engineering Innovation in the Department of Chemical and Biomolecular Engineering at the University of Connecticut. Dr. Sun's current research focuses on the design and synthesis of nano-structured multifunctional materials for various applications, with a focus on energy and environmental engineering. Dr. Sun has published more than one hundred twenty (120) peer-reviewed journal articles. He is the inventor/co-inventor of forty (40)International and US patents/patent applications. The scientific results by Dr. Sun's group have been reported by major media including Chemical & Engineering News of the American Chemical Society, Plastics Engineering magazine of the Society of Plastics Engineers (SPE), Materials 360 of the Materials Research Society (MRS), Smithsonian Magazine, SciencesDaily, MSN, Yahoo, etc. Dr. Sun is a Fellow of the Royal Society of Chemistry as well as a Fellow of the Society of Plastics Engineers (SPE).

摘    要:A bilayer structure composed of polyvinyl alcohol (PVA) or PVA composite thin film atop thick polydimethylsiloxane (PDMS) substrate was prepared. The bilayer structure shows dynamic strain-responsive optical properties. The transition between a transparent state to an opaque state can be easily achieved by uni-axially stretching and releasing the device. Also, a series of derivative mechanochromisms with capabilities of switching "on/off" fluorescence, changing fluorescent color, revealing/hiding information upon mechanical stimuli were prepared. Mechanical and/or moisture responsive wrinkling surface can also be achieved in a similar manner. By altering the chemical structure of the PVA top layer, three different moisture responsive dynamic wrinkling surface can be prepared. Selectively inducing chemical modification on the PVA surface can creat moisture responsive patterned wrinkles, which can lead to appliations in encryption, anti-counterfeit tab, and water indicator for circuits.
   

主办:研究生院

承办:力学与工程学院  应用力学与结构安全省重点实验室