报告题目：Functional materials enabled sensors and actuators for future Human-Machine Interface

报 告 人：诺森比亚大学  Ben Bin Xu  教授

报告时间：2024年4月8日（星期一）14:30

报告地点：莫干山校区图书馆B510会议室

邀 请 人：高分子材料与工程研究所 杨晋涛 教授

Ben Bin Xu

报告人简介：

Ben is a Chair professor in materials and mechanics with a multi-disciplinary research interest covering smart surface, functional materials, applied mechanics and micro-engineering. Ben holds the title of visiting professorship in over 10 universities, including UCLA (US), TAMU (US), University of Alberta (US), University of Sydney (AU), Amity University (UAE), Manipal University (India), etc. He chairs the Materials Characterisation & Properties Group in the Institute of Materials, Mining and Minerals (IoM3). He has published over 230 peer reviewed journal articles (h = 50), 10 books (incl. chapters), 6 patents, given 90+ invited talks and won multiple awards (2016 Young investigator award from the International Polymer Networks Group, 2023 Excellence in Research- mid-career award from AICHE, etc.). Ben is an associate editor for Advanced Composites and Hybrid Materials (SpringerNature, IF=20) and EcoMat (Wiley, IF= 14.6).  Ben is an elected Fellow of the Royal Society of Chemistry (FRSC), Fellow of the Institute of Materials, Mining and Minerals (FIMMM), Fellow of the Royal Society for the Encouragement of Arts, Manufactures and Commerce (FRSA). He has been an elected member in the Advisory Council in IoM3 from 2019, an elected member in the RSC Materials Chemistry Division Council from 2020, an elected member in the RSC Materials Chemistry Division Council (2020-2023).

报告内容摘要：

Graphene aerogels hold huge promises in developing high performance pressure sensors for future human machine interface, due to their highly ordered microstructure and conductive network. However, the bottleneck to their application is the limited strain sensing range caused by intrinsic stiff honeycomb-like structure. Herein, an anisotropic crosslinked chitosan and reduced graphene oxide (CCS-rGO) aerogel metamaterial with a buckling network is realized for the first time, by reconfiguring the microstructure from honeycomb to buckling structure on the cross-section plane, via simple freeze-casting and heating/post-crosslinking strategies. The reconfigured CCS-rGO aerogel shows hyperelasticity with extraordinary durability - no obvious structural damage after 20,000 load-unload cycles under a directional compressive strain up to 0.7. The novel CCS-rGO aerogels based conceptual pressure sensors exhibit an ultrahigh sensitivity of 121.45 kPa-1, an unprecedent sensing range (maximum compressive stress of 146.7 kPa, peak directional compressive strain of 0.95), and robust mechanical and electrical performances. The functionalities enabled by CCS-rGO may open a wide application potential in future human machine interface.