Integration of thin film composite graphene oxide membranes for solvent resistant nanofiltration
Integration of thin film composite graphene oxide membranes for solvent resistant nanofiltration
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DOI：
10.1016/j.memsci.2022.120861
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发表时间：
2022-07
影响因子：
9.5
通讯作者：
Kecheng Guan;Kai Ushio;Keizo Nakagawa;T. Shintani;Tomohisa Yoshioka;Atsushi Matsuoka;Eiji Kamio;W. Jin;H. Matsuyama
中科院分区：
文献类型：
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作者：
Kecheng Guan;Kai Ushio;Keizo Nakagawa;T. Shintani;Tomohisa Yoshioka;Atsushi Matsuoka;Eiji Kamio;W. Jin;H. Matsuyama
氧化石墨烯 (GO) 的耐溶剂性使其成为一种很有前途的材料，可用于构建在涉及溶剂的条件下进行精确分离的膜。通常采用由显示薄膜复合（TFC）膜结构的多孔基材支撑的薄GO层压层，并且复合结构的集成对于获得理想的性能是必要的。虽然很少涉及支撑层压板中基材对溶剂传输的影响，但本文以二胺交联为前提制备了集成GO层压板，然后研究了具有不同多孔结构特性的支撑基材对TFC膜性能的影响。研究发现，即使层压板在溶剂中以类似稳定的层间距集成，基材在形成在溶剂中具有理想分子排斥性能的 GO 层压板中也发挥着关键作用。通过优化具有有限表面孔隙率和孔径的支撑基底，TFC GO膜的染料分子截留性能从3%显着改变到92%。此外，基底改变的 GO 纳米片的堆叠和通道形成表现出遵循不同传输模型的溶剂渗透。这项研究可以为设计用于耐溶剂过滤的功能性 GO 膜提供考虑，重点是底物优化。
Solvent resistance of graphene oxide (GO) makes it a promising material to construct membranes for precise separations with solvent-involved conditions. A thin GO laminate layer supported by a porous substrate displaying a thin film composite (TFC) membrane configuration is commonly employed, and integration of the composite structure is necessary to acquire desirable performance. While the substrate effects on solvent transport in supported laminates were rarely involved, here we prepared integrated GO laminates using diamine crosslinking as a precondition and then investigated the effects of supporting substrates with different porous structure properties on TFC membrane performance. It was found that even if the laminates were integrated with similarly stable interlayer spacing in solvents, the substrate played a key role in forming GO laminates with desirable molecular rejection properties in solvents. The dye molecule rejection performance of the TFC GO membrane was significantly changed from 3% to 92% by optimizing the supporting substrate with limited surface porosity and pore size. Additionally, the altered stacking and channel formation of the GO nanosheets by the substrate exhibited solvent permeation following different transport models. This study may provide considerations in designing functional GO membranes for solvent resistant filtrations with an emphasis on substrate optimization.