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龙虎押注技巧稳赢材料科学与工程研究院《材料科学论坛》学术报告:Piezoelectric Polymers and Ceramic-Polymer Nanocomposites

龙虎押注技巧稳赢材料科学与工程研究院《材料科学论坛》

学术报告

报告题目:Piezoelectric Polymers and Ceramic-Polymer Nanocomposites

报告人:Prof. Qing Wang (Department of Materials Science and Engineering, The Pennsylvania State University, University Park )

报告时间:2019年5月13日(周一) 下午4:00

报告地点:龙虎押注技巧稳赢逸夫技术科学楼A205学术报告厅

联系人:林元华老师 62773741

欢迎广大师生踊跃参加!

报告摘要:
Flexible piezoelectric materials are pivotal to a variety of emerging applications ranging from wearable electronic devices, sensors to biomedical devices. In this talk, I will present our latest results on the scalable ferroelectric ceramic-polymer composites based on three-dimensional (3-D) interconnected microfoams. The 3-D polymer composite exhibits exceptional piezoelectric characteristics under multiple loading conditions (i.e., compression, stretching, and bending) and high mechanical durability under thousands of cycles. The 3-D polymer composite also displays excellent pyroelectricity, thereby enabling concurrent thermal and mechanical energy scavenging. In addition, I will present our efforts on the development of the ferroelectric polymers exhibiting the state-of-the-art piezoelectric coefficient based on the concept of morphotropic phase boundary (MPB). Our work represents the discovery of MPB in the ferroelectric polymers and provides a unique molecular engineering approach to MPB. We have also successfully addressed the controversies in the fundamental understandings of the origin of piezoelectricity in ferroelectric polymers, which has plagued the field despite extensive studies during the past decades.

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