| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5365426 | Applied Surface Science | 2008 | 4 Pages |
Abstract
A radioisotope slow positron beam has been built at the Chung Yuan Christian University in Taiwan for the research and development in membrane science and technology. Doppler broadening energy spectra and positron annihilation lifetime have been measured as a function of positron energy up to 30Â keV in a polyamide membrane prepared by the interfacial polymerization between triethylenetetraamine (TETA) and trimesoyl chloride (TMC) on modified porous polyacrylonitrile (PAN) asymmetric membrane. The multilayer structures and free-volume depth profile for this asymmetric membrane system are obtained. Positron annihilation spectroscopy coupled with a slow beam could provide new information about size selectivity of transporting molecules and guidance for molecular designs in polymeric membranes.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Wei-Song Hung, Chia-Hao Lo, Mei-Ling Cheng, Hongmin Chen, Guang Liu, Lakshmi Chakka, D. Nanda, Kuo-Lun Tung, Shu-Hsien Huang, Kueir-Rarn Lee, Juin-Yih Lai, Yi-Ming Sun, Chang-Cheng Yu, Renwu Zhang, Y.C. Jean,