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首页> 外文期刊>Journal of Applied Polymer Science >In Situ Cross-linked-PDMS/BPPO Membrane for the Recovery of Butanol by Pervaporation
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In Situ Cross-linked-PDMS/BPPO Membrane for the Recovery of Butanol by Pervaporation

机译：原位交联PDMS / BPPO膜通过全蒸发回收丁醇

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摘要

In this study, an in situ crosslinked polydimethylsiloxane/brominated polyphenylene oxide (c-PDMS/BPPO) membrane on ceramic tube has been prepared for the recovery of butanol by pervaporation. A series of BPPO with different bromide-substituted ratio were firstly synthesized through Wohl-Ziegler reaction. BPPO and PDMS were sequentially assembled and in situ crosslinked to form the final c-PDMS/BPPO membrane. The results of solid-state NMR and Differential Scanning Calorimeter demonstrated that the c-PDMS/BPPO copolymer has a crosslinking structure and the SEM result proved the coverage of ceramic tube by copolymer layer. The effects of preparation conditions including dipping time and bromide-substituted ratio of BPPO on the membrane performance were studied. The pervaporation experiments of butanol-water mixture indicated that the c-PDMS/BPPO membrane exhibited an acceptable flux of 220 g·m~(-2)·h~(-1) and high separation factor of 35 towards butanol, when the bromide-substituted ratio was 34 wt % and the dipping time was 1.33 h. Moreover, the c-PDMS/BPPO membrane performed excellent stability in an about 200 h continuous butanol recovery, as compared to the PDMS membrane.
机译：在这项研究中，在陶瓷管上制备了原位交联的聚二甲基硅氧烷/溴化聚苯醚（c-PDMS / BPPO）膜，用于通过全蒸发回收丁醇。首先通过Wohl-Ziegler反应合成了一系列具有不同溴取代率的BPPO。依次组装BPPO和PDMS并原位交联以形成最终的c-PDMS / BPPO膜。固态NMR和差示扫描量热仪的结果表明，c-PDMS / BPPO共聚物具有交联结构，并且SEM结果证明共聚物层覆盖了陶瓷管。研究了浸渍时间和BPPO的溴取代率等制备条件对膜性能的影响。丁醇-水混合物的全蒸发实验表明，当溴化物作用时，c-PDMS / BPPO膜表现出可接受的通量为220 g·m〜（-2）·h〜（-1），对丁醇的分离系数为35。取代比例为34重量％，浸渍时间为1.33小时。此外，与PDMS膜相比，c-PDMS / BPPO膜在约200小时连续丁醇回收中表现出出色的稳定性。

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