Catalytic poly(vinyl alcohol) functionalized membranes obtained by gamma irradiation

被引：7
|
作者：
Casimiro, M. H. [1 ]
Silva, A. G. [1 ]
Pinto, J. V. [2 ,3 ]
Ramos, A. M. [1 ]
Vital, J. [1 ]
Ferreira, L. M. [4 ]
机构：
[1] Univ Nova Lisboa, FCT, Dept Quim, REQUIMTE CQFB, P-2829516 Caparica, Portugal
[2] Univ Nova Lisboa, FCT, Dept Ciencia Mat, P-2829516 Caparica, Portugal
[3] Univ Nova Lisboa, FCT, CENIMAT I3N, P-2829516 Caparica, Portugal
[4] ITN, Unidade Fis & Aceleradores, P-2656953 Sacavem, Portugal
来源：
RADIATION PHYSICS AND CHEMISTRY | 2012年 / 81卷 / 09期
关键词：
Polymeric catalytic membranes; Gamma irradiation; Poly(vinyl alcohol); Sulfonic groups; Isoamyl acetate; ION-EXCHANGE-RESIN; POLYMERIC MEMBRANES; ACETIC-ACID; ESTERIFICATION;
D O I：
10.1016/j.radphyschem.2012.01.036
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polymeric catalytic membranes bearing sulfonic acid functions have been prepared by mutual gamma irradiation at a Co-60 source, of poly(vinyl alcohol) (PVA) membranes and methanesulfonic acid. The effect of various synthesis conditions on membranes' physical-chemical properties and catalytic activity in the esterification reaction between acetic acid and isoamyl alcohol to obtain isoamyl acetate (banana flavor), was evaluated. The membranes were characterized by ATR-FTIR, TPP, AFM and SEM. Water contact angle determinations were also performed. The obtained results showed that within the range of conditions studied the increase in sulfonic acid groups' content is accompanied by an enhancement in the membranes catalytic activity, while the increase in absorbed dose leads to a decrease in catalytic activity. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1314 / 1318
页数：5
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