Incorporation of multiwalled carbon nanotubes into poly(vinyl alcohol) Membranes for use in the pervaporation of water/ethanol mixtures

被引：0
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作者：
Choi, Jae-Hyun [1 ,2 ]
Jegal, Jonggeon [1 ]
Kim, Woo-Nyon [2 ]
Choi, Ho-Sang [3 ]
机构：
[1] Membrane and Separation Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-606, Korea, Republic of
[2] Department of Chemical and Biological Engineering, Applied Rheology Center, Korea University, Anam-dong, Seoul 136-701, Korea, Republic of
[3] Department of Chemical Engineering, Kyungil University, Gyeongbuk 712-701, Korea, Republic of
来源：
Journal of Applied Polymer Science | 2009年 / 111卷 / 05期
关键词：
Multiwalled carbon nanotube (MWNT)/poly (vinyl alcohol) (PVA) blend membranes were prepared by the solution-casting method to determine the effect of MWNTs with nanoscale empty inner space along the tube length on the pervaporation performance of a PVA membrane in the separation of alcohol/water mixtures. The blend membranes were then characterized with several analytical methods such as transmission electron microscopy; differential scanning calorimetry; and X-ray diffractometry: Transmission electron microscopy showed that the MWNTs were homogeneously distributed through the PVA matrix. The glass-transition temperature of the PVA membrane was increased from 69.21 to 78.53C via blending with MWNTs. The crystallinity of the PVA matrix decreased with increasing MWNTs up to 5 wt % from 41 to 36%. The pervaporation properties of the blend membranes were completely different from those of the pure PVA membrane in the separation of water/ethanol mixtures. The flux of the membrane was increased with the amount of MWNTs; whereas the separation factor was maintained up to 1.0 wt % MWNTs. However; beyond that; it was reduced. These results suggested that two factors; the crystallinity of the membrane and the diameters of the MWNTs; affected the performance of the membranes. © 2008 Wiley Periodicals; Inc;
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页码：2186 / 2193
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