Multilayer assembled CS-PSS/ceramic hollow fiber membranes for pervaporation dehydration
Multilayer assembled CS-PSS/ceramic hollow fiber membranes for pervaporation dehydration
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DOI：
10.1016/j.seppur.2018.04.006
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发表时间：
2018-09
影响因子：
8.6
通讯作者：
Xin Zhang;Ming Wang;Chen-Hao Ji;Xin-Ru Xu;Xiao-hua Ma;Zhen-liang Xu
中科院分区：
文献类型：
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作者：
Xin Zhang;Ming Wang;Chen-Hao Ji;Xin-Ru Xu;Xiao-hua Ma;Zhen-liang Xu
渗透汽化是从溶液中去除微量或微量物质的一种有效方法。光伏膜被认为是这一过程中最重要的元素。本研究通过聚4-苯磺酸与壳聚糖的多层组装，制备了陶瓷中空纤维PV膜。用场发射扫描电子显微镜(SEM)、X射线衍射仪(X射线衍射仪)、傅里叶变换红外光谱仪(FTIR)和水接触角分别对膜的表面和截面形貌、物化结构和亲水性进行了表征。通过对水-乙醇溶液的脱水实验考察了复合膜的光伏性能。系统研究了装配液浓度对光伏性能的影响。当PSS溶液浓度为0.75 wt%时，膜的PV分离指数最高，为4.47 × 105，通量为495 g/m2.H，分离系数为904，在70 °C下脱水10 wt%的水-乙醇溶液。
Pervaporation (PV) is an effective approach for the removal of trace or micro substances from solutions. PV membrane is considered to be the most essential element for this process. In this study, the fabrication of ceramic hollow fiber PV membranes is demonstrated through multilayer assembly of poly(4-styrenesulfonic acid) and chitosan. The surface and cross-section morphologies, physical and chemical structures as well as the hydrophilicity of the membranes were characterized by field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectrophotometer (FTIR) and water contact angle, respectively. The PV performance of the composite membranes was investigated by dehydration of water-ethanol solution. The effect of assembly solution concentration on PV performance was studied systematically. The assembled composite membranes with the concentration of 0.75 wt% PSS solution exhibited the highest PV separation index (PSI) value of 4.47 × 105with flux of 495 g/m2h and separation factor of 904 for dehydration of 10 wt% water-ethanol solution at 70 °C.