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在生理温度下响应特定离子信号的奥斯莫斯压力控制,使用分子识别离子隔离膜
1Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku 113-8656, Japan.
Journal of the American Chemical Society
|May 20, 2004
概括
一个新的离子膜选择性地捕获离子 (Ba2+),自主和可逆地产生透压力. 这种响应性膜提供了使用离子或德克斯梯度的控制分离.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 膜技术 膜技术 膜技术
背景情况:
- 开发用于离子分离的选择性膜对于各种工业和环境应用至关重要.
- 作为对特定离子的反应,自主和可逆透压的产生仍然是膜设计中的一个重大挑战.
研究的目的:
- 创建一个分子识别封闭离子膜,能够自主和可逆的透压力生成.
- 为了研究膜对特定双价离子的选择性,特别是离子 (Ba2+).
- 探索使用度梯度 (离子和溶液) 作为膜驱动透的驱动力.
主要方法:
- 在多孔聚乙烯薄膜上对N-异烯胺和佐[18]皇冠-6-烯胺进行移植共聚合.
- 膜的离子结合能力和透压力响应的表征.
- 在不同的度梯度下,用不同的离子 (Ba2+,Ca2+) 和溶液 (dextran) 测试膜的性能.
主要成果:
- 准备好的膜通过其皇冠以太受体证明了选择性捕获Ba2+离子.
- 自主和可逆透压是针对Ba2+而产生的,而不是Ca2+的.
- 离子和德克斯两种度梯度都可以驱动透反应,而德克斯可以控制临界度和持续时间.
结论:
- 开发的分子识别隔离离子膜对Ba2+具有很高的选择性,并使自主透压力产生成为可能.
- 膜的功能可以通过外部度梯度来控制,为可调节的分离过程提供了潜力.
- 这项技术为选择性离子分离和受控的透过程提供了一个有前途的平台.
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