期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 79, 期 1, 页码 79-84出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/jctb.942
关键词
bacterial cellulose; UV polymerization; acrylic acid modification; cation-exchange membrane; environmentally-compatible membrane
The feasibility of using bacterial cellulose as a source for environmentally compatible ion-exchange membranes (IEM) was studied. Bacterial cellulose was modified with cation-exchangeable acrylic acid (AAc) by UV-graft polymerization to prepare membranes having ion-exchange capacity (IEC) and greater structural density. Fourier transform infrared (FTIR) spectra showed that acrylic acids were successfully bound to bacterial cellulose. Morphological changes of acrylic acid-treated bacterial cellulose were examined through scanning electron microscopy. A dense structure of the membrane increased with increasing UV-irradiation time. Acrylic-modified bacterial cellulose membrane showed reasonable mechanical properties, such as tensile strength of 12MPa and elongation of 6.0%. Also the prepared membranes were comparable to the commercial membrane CMX in terms of the electrochemical properties, ie IEC of 2.5meq g(-1)-dry mem, membrane electric resistance of 3 ohm cm(2), and transport number of 0.89. (C) 2003 Society of Chemical Industry.
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