https://scholars.lib.ntu.edu.tw/handle/123456789/410358
標題: | A drying-free and one-step process for the preparation of siloxane/CS mixed-matrix membranes with outstanding ethanol dehydration performances | 作者: | Lin Y.-F. Ho J.-C. Andrew Lin K.-Y. Tung K.-L. Chung T.-W. Lee C.-C. |
關鍵字: | Drying free;Mixed-matrix membrane;One-step;Pervaporation;Siloxane | 公開日期: | 2019 | 起(迄)頁: | 325-330 | 來源出版物: | Separation and Purification Technology | 摘要: | In this study, tetraethyl orthosilicate-derived (TEOS-derived) siloxanes were successfully incorporated into chitosan (CS) membranes to form siloxane/CS mixed-matrix membranes (MMMs) via a drying-free and one-step process. Compared with the two-step process for the formation of MMMs in the previous literature, the one-step process of membrane preparation has the advantages of a decrease in the membrane formation time and the prevention of particle aggregation to form uniform and smooth MMMs. The siloxane/CS MMMs were used to separate a mixture of ethanol/water in the pervaporation process at 25 ¢XC. MMMs with different siloxane concentrations, such as 0.025, 0.05, 0.15, 0.3 and 0.5 wt%, have been investigated, and MMMs with 0.05 wt% siloxanes (0.05 wt% MMMs) have the best pervaporation performance, with flux, separation factor and pervaporation separation index (PSI) values of 468 g/m 2 h, 2182 and 1021 kg/m 2 h, respectively. The pervaporation performance of 0.05 wt% siloxane/CS MMMs is better than that of CS-based membranes and other MMMs, as reported in the previous literature. As a result, the as-prepared siloxane/CS MMMs with 0.05 wt% siloxane loading show great potential for future industrial pervaporation applications. ? 2019 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/410358 | ISSN: | 13835866 | DOI: | 10.1016/j.seppur.2019.03.101 |
顯示於: | 化學工程學系 |
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