• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Russian Journal of Physical Chemistry >The self-diffusion of water and saturated aliphatic alcohols in cation-exchange membranes
【24h】

The self-diffusion of water and saturated aliphatic alcohols in cation-exchange membranes

机译：水和饱和脂肪醇在阳离子交换膜中的自扩散

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

The self-diffusion of water, methanol, ethanol, isopropanol, and butanol in membranes based on polyethylene and sulfonated copolymer of styrene and divinylbenzene (MK-100) and membranes based on sulfo-containing aromatic polyamides (PA) and a copolymer of 1,2,4,5-benzenetetracarboxylic acid with 4,4′-diaminodiphenyl oxide (PAK) was investigated by the pulsed magnetic field gradient NMR technique. In MK-100 sulfo cation-exchange membranes and PAK carboxylic membranes, two types of sorbate molecules with translational mobilities differing by an order of magnitude were observed. It was established that, in these membranes, the major diffusant portion was transferred trough transport channels formed by functional groups of membranes, counterions, and diffusant molecules (ionogenic channels). The conclusion was drawn that, in PA membranes, water and alcohol molecules were distributed uniformly and carbonyl croups of the polymeric matrix participated in the formation of transport channels. Relations between the structure of membranes, the character of diffusant-polymeric matrix interaction, and the translational mobility of sorbate molecules were found.
机译：水，甲醇，乙醇，异丙醇和丁醇在聚乙烯和苯乙烯与二乙烯基苯磺化共聚物（MK-100）的膜以及含磺基芳族聚酰胺（PA）和1的共聚物的膜中的自扩散通过脉冲磁场梯度NMR技术研究了带有4,4'-二氨基二苯醚（PAK）的2,4,5-苯四甲酸。在MK-100磺化阳离子交换膜和PAK羧酸膜中，观察到两种类型的山梨酸酯分子，其平移迁移率相差一个数量级。已经确定，在这些膜中，主要的扩散物部分是通过膜，抗衡离子和扩散物分子的离子基团（离子发生通道）形成的传输通道转移的。得出的结论是，在PA膜中，水和醇分子均匀分布，并且聚合物基质的羰基团团参与了传输通道的形成。发现了膜的结构，扩散-聚合基质相互作用的特征以及山梨酸酯分子的翻译迁移率之间的关系。

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