主题: Phase Behaviors of Polyelectrolyte Solutions主讲人: Dr. Pengfei Zhang地点: 先进低维材料中心学术交流室（2号学院楼西6楼2632室）时间: 2017-05-17 10:00:00组织单位: 先进低维材料中心
主讲人简介：Dr. Pengfei Zhang，Division of Chemistry and Chemical Engineering, California Institute of technology
报告摘要：Polyelectrolytes (PEs) are ubiquitous in biology and a myriad of industrial applications. Theoretical understandings on the structure and the phase behavior of PE solutions are of extreme importance to comprehend their functions in biology on one hand and to improve their applications in industry on the other hand. In this talk, Dr. Zhang will discuss his recent research on the bulk phase behaviors of an asymmetric polycation and polyanion solution mixture by using a simple liquid state theory. In particular, he constructed a 2D curved binodal surface in a 3D concentration phase diagram, which contains the complete phase behavior information and can give very rich phase behaviors. Specifically, based on this phase diagram, he predicted the phase behaviors of three experimentally relevant systems: 1. Complex coacervation of a symmetric polycation and polyanion mixture, 2. Titration behaviors of a polyacid with a polybase, 3. Salting-out and salting-in of PE solutions. The theoretical calculations are qualitatively consistent with experimental observations.