Lin Y.-F.Ho J.-C.Andrew Lin K.-Y.Tung K.-L.Chung T.-W.Lee C.-C.2019-05-242019-05-24201913835866https://scholars.lib.ntu.edu.tw/handle/123456789/410358In 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.Drying freeMixed-matrix membraneOne-stepPervaporationSiloxanejournal article10.1016/j.seppur.2019.03.1012-s2.0-85063762572https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063762572&doi=10.1016%2fj.seppur.2019.03.101&partnerID=40&md5=9c396672d891bd5894edcb4859ef39d9