Prospective applications of nanometer-scale pore size biomimetic and bioinspired membranes
Prospective applications of nanometer-scale pore size biomimetic and bioinspired membranes
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DOI：
10.1016/j.memsci.2020.118968
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发表时间：
2020-12
影响因子：
9.5
通讯作者：
Yu-Ming Tu;Laxmicharan Samineni;Tingwei Ren;A. Schantz;Woochul Song;Siddhartha Sharma;Manish Kumar
中科院分区：
文献类型：
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作者：
Yu-Ming Tu;Laxmicharan Samineni;Tingwei Ren;A. Schantz;Woochul Song;Siddhartha Sharma;Manish Kumar
仿生和生物激发膜（BBMs）作为基于膜的分离和纯化的创新平台已经引起了极大的关注。这些膜通常由高渗透性的生物或受生物启发的孔隙结构或具有明确孔隙几何形状的通道组成。孔结构嵌入在一个相对不透水的合成膜基质中，整个膜表现出高性能、功能性和选择性，这主要源于孔的性质。所使用的通道具有良好控制和均匀的内孔径，从而导致完全均匀的孔径分布，与当前商业膜中常见的宽孔径分布形成直接对比。因此，仿生膜具有针对需要精确选择性的特定分离的潜力，特别是在具有挑战性的亚纳米到纳米尺寸范围内。到目前为止，围绕bbm的讨论主要集中在水净化上。然而，这些膜可以在其他潜在的应用中提供显着的好处，例如抗生素分离，均相催化剂保留，有机酸分离，气体分离，有机溶剂纳滤，食品加工，防护和透气织物以及离子/离子分离。本文首先阐述了单分散孔径分布对纳米级分离选择性的重要性，然后讨论了BBM膜的潜在应用。如果可以设计出与这些应用中使用的环境兼容的无缺陷仿生膜，这些膜可能会提供一条途径，超越限制当前合成膜分离性能的渗透性-选择性权衡。
Biomimetic and bioinspired membranes (BBMs) have garnered significant attention as innovative platforms for membrane-based separations and purification. These membranes typically consist of highly permeable biological or bioinspired pore structures or channels with well-defined pore geometries. The pore structures are embedded in a relatively impermeable synthetic membrane matrix, and the overall membrane demonstrates high performance, functionality, and selectivity originating primarily from the pore properties. The channels utilized have well-controlled and uniform inner pore diameters, leading to a completely uniform pore size distribution, in direct contrast to the wide pore size distribution common in current commercial membranes. Biomimetic membranes thus have the potential to target specific separations that require precise selectivity, particularly in the challenging sub-nanometer to nanometer size ranges. So far, the discussion around BBMs has largely focused on water purification. However, these membranes could provide significant benefits in other potential applications, such as antibiotic separations, homogeneous catalyst retention, organic acid separations, gas separations, organic solvent nanofiltration, food processing, protective and breathable fabrics, and ion/ion separations. This review first illustrates the importance of monodisperse pore size distribution to selectivity in nm-scale separations, and then discusses potential applications of BBM membranes. Provided that defect-free biomimetic membranes compatible with the environments used in these applications can be engineered, these membranes may provide a path to move beyond the permeability-selectivity tradeoff that limits the separation properties of current synthetic membranes.