n situ Nanoporous Structural Characterization of Asymmetric Hollow Fiber Membranes for Desalination using Raman Spectroscopy
n situ Nanoporous Structural Characterization of Asymmetric Hollow Fiber Membranes for Desalination using Raman Spectroscopy
复制标题
使用拉曼光谱对海水淡化用非对称中空纤维膜进行原位纳米孔结构表征
DOI：
10.1016/j.memsci.2021.119337
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发表时间：
2021
影响因子：
9.5
通讯作者：
H. Matsuyama
中科院分区：
文献类型：
--
作者：
T. Nakao;M. Akashi;M. Ishibashi;M. Yao;K. Nakagawa;T. Shintani;H. Matsuyama
观察膜内部的纳米孔结构一直是膜研究中最大的挑战之一，近年来许多研究都采用正电子湮灭寿命谱等方法来获得结构洞察力。在本报告中，我们展示了拉曼光谱在原位条件下研究膜内纳米孔结构的重要潜力。制备了磺化聚芳醚砜和三醋酸纤维素不对称中空纤维膜，并用拉曼光谱对其纳米孔结构进行了表征。测定了膜的尺寸、力学性能和反渗透性能。拉曼光谱测定的膜结构与膜的力学性能和反渗透性能有很好的相关性。本研究表明，拉曼光谱技术是一种很有前途的用于脱盐膜内部纳米孔结构检测的方法，同时也为开发具有优化纳米孔结构的膜提供了良好的工具。
Observing the nanoporous structure inside membranes has been one of the greatest challenges in membrane research, and many recent studies have employed positron annihilation lifetime spectroscopy, among other methods, to gain structural insights. In this report, we demonstrate the significant potential of Raman spectroscopy for investigating the nanoporous structure inside membranes under in situ conditions. Sulfonated poly(arylene ether sulfone) and cellulose triacetate asymmetric hollow fiber membranes were fabricated and their nanoporous structures were examined using Raman spectroscopy. The membrane dimensions, mechanical properties, and reverse osmosis (RO) performances were also measured. The membrane structures estimated by Raman spectroscopy correlated very well with the mechanical properties and RO performances. This study indicated that Raman spectroscopy represents a promising method for detecting the nanoporous structures inside membranes for desalination applications, and furthermore, that it would be a good tool for developing membranes with optimized nanoporous structures.