10月26日“膜分离与水处理论坛”第十一讲预告

    题目：Analysis of Polymeric Membrane Microstructure using Positron Annihilation Spectroscopy

          正电子湮灭技术在薄膜鉴定之应用    
    时间：2015年10月26日 下午2:00
    地点：朝晖校区邵科馆一楼圆廊会议室
    报告人：台湾中原大学化工系薄膜中心主任，李魁然教授
    
    报告摘要：Abstract The concept of correlating the physical defects at the atomic and molecular level, such as vacancy or free volume with membrane performances, such as permeability and selectivity, for optimal design of membranes is very important. In general, atomic probes, SEM, and AFM are powerful tools for detecting static defects near the surface. However, the above instruments are difficult to be used to analyze the fine structure under the membrane skin-layer. One important approach is to study the free-volume properties of polymeric membrane systems, the very origins of physical structure of polymers, i.e., from the Å to 1 nm level and 10-6 - 10-15 s time scale of motion. In this presentation, we introduced a special physical technique, positron annihilation spectroscopy (PAS), it is a special nondestructive evaluation (NDE) technique for materials characterization. During the recent decades, PAS was developed as a useful tool to probe the fine structure of polymeric membrane. Especially, PAS was used to measure physical properties of defects, i.e., free volumes at the atomic and molecular levels as a function of chemical changes and molecular modifications in a polymeric membrane system.

    个人简介：李魁然，教授、博导，台湾中原大学化学工程系教授暨薄膜研究发展中心主任，膜分离技术及高分子膜材料领域知名专家，并担任国际知名期刊Journal of Membrane Science编委。主要从事渗透汽化、气体分离、纳滤等膜分离技术研究，开拓了从分子尺度设计制备高性能分离膜并研究其构效关系的新方法，成功实现了具有自主知识产权渗透汽化膜的工程化应用。建立了亚洲最先进的『正电子湮灭』分析表征技术，开辟了从分子水平研究高分子膜微结构及分离性能的新方法。已在国际知名期刊如Angew. Chem. Int. Ed., Macromolecules, Carbon, Langmuir, J. Membrane Sci.等发表论文200余篇，近五年被他引2350余次，H-index高达31。所开发的无机-有机纳米杂化渗透汽化膜已在台湾地区实现工业化，并获台湾地区及美国专利，同时荣获2008年“台北国际发明及技术交易展览会”银牌及铜牌奖，2009年“大学产业经济贡献奖-团队奖”、“优良技转奖”，中原大学“研究杰出奖”和“卓越技转奖”。连续式制程制备单一式或复合式含石墨烯渗透蒸发膜获2014年台北国际发明及技术交易展铜奖2015美国匹兹堡国际发明展金奖。
    
    欢迎广大师生参加报告会，踊跃提问！