• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Incorporation of Multiwalled Carbon Nanotubes into Poly(vinyl alcohol) Membranes for Use in the Pervaporation of Water/Ethanol Mixtures
【24h】

Incorporation of Multiwalled Carbon Nanotubes into Poly(vinyl alcohol) Membranes for Use in the Pervaporation of Water/Ethanol Mixtures

机译：将多壁碳纳米管结合到聚乙烯醇膜中，用于水/乙醇混合物的全蒸发

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

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 78.53 degrees C 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. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 2186-2193, 2009
机译：通过溶液浇铸法制备了多壁碳纳米管（MWNT）/聚乙烯醇（PVA）共混膜，以确定沿管长方向具有纳米级空内部空间的MWNT对PVA膜在管内的全蒸发性能的影响。分离酒精/水混合物。然后用几种分析方法（如透射电子显微镜，差示扫描量热法和X射线衍射法）对共混膜进行表征：透射电子显微镜表明MWNTs通过PVA基质均匀分布。通过与MWNTs混合，PVA膜的玻璃化转变温度从69.21摄氏度增加到78.53摄氏度。 PVA基质的结晶度随MWNTs的增加而增加，从41％降至36％至5 wt％。在分离水/乙醇混合物时，共混膜的渗透汽化特性与纯PVA膜的渗透汽化特性完全不同。膜通量随MWNTs的增加而增加，而分离系数则保持至1.0 wt％MWNTs。但是，除此之外，它减少了。这些结果表明，膜的结晶度和MWNT的直径这两个因素影响膜的性能。 （C）2008 Wiley Periodicals，Inc. J Appl Polym Sci 111：2186-2193，2009年

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号