Free Volume in Membrane Materials

摘要：

Gas separation by membranes is important for many technical applications. The amount and distribution of free volume in polymeric membranes significantly determines the transport and separation properties. Recend improvements are centered around addition of nanoparticles, as the general limit of permeability and selectivity for pure polymers is reached. Positron annihilation lifetime spectroscopy (PALS) is a general accepted technique for determination of free volume in polymers. In the present work on the one hand a clear correlation between changes of permeability and free volume in Polyphenylenoxide with different concentration of hyperbranched polyesters (Dendrimers) will be shown 1.

作者: K.R(a)tzke J.Kruse F.Faupel D.M.Sterescu D.F.Stamatialis M.Wessling

作者单位: Chair for Multicomponent Materials,Univ.Kiel,Kaiserstr.2,D-24143 Kiel,Germany University of Twente,Faculty of Science and Technology,Membrane Technology Group,P.O.Box 217,7500 AE

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 19

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）