Investigation on CO2-induced plasticization in polycarbonate membrane using positron annihilation lifetime spectroscopy

被引：8

作者：

Lo, Chia-Hao ^{[1
]}

Hung, Wei-Song ^{[1
]}

De Guzman, Manuel ^{[1
]}

Huang, Shu-Hsien ^{[2
]}

Li, Chi-Lan ^{[3
]}

Hu, Chien-Chieh ^{[1
,3
]}

Jean, Yan-Ching ^{[1
,4
]}

Lee, Kueir-Rarn ^{[1
]}

Lai, Juin-Yih ^{[1
]}

机构：

[1] Chung Yuan Christian Univ, R&D Ctr Membrane Technol, Dept Chem Engn, Chungli 32023, Taiwan

[2] Natl Ilan Univ, Dept Chem & Mat Engn, Ilan 26047, Taiwan

[3] Nanya Inst Technol, Dept Chem & Mat Engn, Chungli 32034, Taiwan

[4] Univ Missouri, Dept Chem, Kansas City, MO 64110 USA

来源：

JOURNAL OF MEMBRANE SCIENCE | 2010年 / 363卷 / 1-2期

关键词：

Polycarbonate membrane; Carbon dioxide permeability; Plasticization; Free-volume distribution; Positron annihilation lifetime spectroscopy; POLYMERIC MEMBRANES; HOLE PROPERTIES; GAS; SORPTION;

D O I：

10.1016/j.memsci.2010.07.049

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, the microstructural changes in polycarbonate (PC) membranes induced by the CO2 sorption were investigated using the CO2 sorption isotherm data and the positron annihilation lifetime spectroscopy (PALS). The effects of the PC exposure to CO2 at different temperatures and gas pressures on the free-volume distribution were discussed. The distribution at ambient conditions or 5 atm He pressure displayed a monomodal curve, whereas that at different CO2 pressures showed a bimodal curve, indicating the presence of small and big free-volume sizes due to the serious plasticization caused by CO2. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：302 / 308

页数：7

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