报告题目：Functionalized Halloysites for Epoxy Nanocomposite Applications

报告人：美国康涅狄格大学Luyi Sun 教授

报告时间：2018年5月22日（周二）上午10:00

报告地点：实验一楼第一会议室

联系人：黄发荣教授

报告人介绍：

Dr. Luyi Sun is a Castleman Professor in Engineering Innovation in the Department of Chemical and Biomolecular Engineering, and the director of the Polymer Program at the University of Connecticut. His current research focuses on the design and synthesis of nano-structured multifunctional hybrids for various applications. Dr. Sun has published more than one hundred fifty (150) peer-reviewed journal articles. He is the inventor/co-inventor of forty (40) international and US patents/patent applications. Many of his patents have been licensed or commercialized. 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), New Scientist, Smithsonian Magazine, Yahoo, MSN, etc. Dr. Sun is a Fellow of the Society of Plastics Engineers (SPE) and a Fellow of the Royal Society of Chemistry (RSC).

报告内容简介：

Polymer nanocomposites have been extensively studied over the past few decades, and a wide range of applications have been developed based on their excellent performance. Halloysite nanotube (HNT), a type of naturally occurring aluminosilicate clay, has come into focus for study as a nanofiller to reinforce polymers. Herein, we report a new approach for modifying HNTs for the preparation of epoxy/HNT nanocomposites with improved stiffness and toughness. The hydroxylated HNTs (h-HNTs) from NaOH treatment was further modified by sodium dodecyl sulfate (SDS), leading to better colloidal stability as confirmed by zeta potential. With an addition of 5 phr of this SDS treated h-HNTs (HNTs-SDS) into epoxy matrix, the modulus and fracture toughness of epoxy/HNT-SDS nanocomposite was improved by 22% and 52%, respectively. The simultaneous improvements in both stiffness and toughness are believed owing to the significantly improved interface between epoxy matrix and HNTs after surface treatment.