Tunable organic solvent nanofiltration in self-assembled membranes at the sub-1 nm scale.
Tunable organic solvent nanofiltration in self-assembled membranes at the sub-1 nm scale.
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亚1纳米尺度下自组装膜中可调节的有机溶剂纳滤
DOI：
10.1126/sciadv.abm5899
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发表时间：
2022-03-18
期刊：
影响因子：
13.6
通讯作者：
Osuji CO
中科院分区：
文献类型：
--
作者：
Zhang Y;Kim D;Dong R;Feng X;Osuji CO
有机溶剂稳定膜具有强选择性和高渗透性，在化学分离过程中具有改变能量利用的潜力。一个关键的目标是开发具有均匀，明确定义的1 nm级孔的材料，其尺寸可以高保真地以小增量进行调整。在这里，我们展示了一类有机溶剂稳定的纳米多孔膜来自自组装液晶介相显示这样的特性，并阐明其传输特性。传输调节尺寸由中间相几何形状定义，并且可以通过修改介晶的化学结构或中间相的组成以约0.1 nm的增量进行控制。高度有序的纳米结构提供了以前未确定的机会，为系统设计的有机溶剂纳滤膜定制的选择性和渗透性，并了解和模拟拒绝在纳米级流量。因此，这些膜代表了朝着实现精确有机溶剂纳米过滤的目标的进展。自组装膜具有均匀的孔径可调在0.1 nm的步骤已被开发用于有机溶剂纳滤。
Organic solvent–stable membranes exhibiting strong selectivity and high permeance have the potential to transform energy utilization in chemical separation processes. A key goal is developing materials with uniform, well-defined pores at the 1-nm scale, with sizes that can be tuned in small increments with high fidelity. Here, we demonstrate a class of organic solvent–stable nanoporous membranes derived from self-assembled liquid crystal mesophases that display such characteristics and elucidate their transport properties. The transport-regulating dimensions are defined by the mesophase geometry and can be controlled in increments of ~0.1 nm by modifying the chemical structure of the mesogen or the composition of the mesophase. The highly ordered nanostructure affords previously unidentified opportunities for the systematic design of organic solvent nanofiltration membranes with tailored selectivity and permeability and for understanding and modeling rejection in nanoscale flows. Hence, these membranes represent progress toward the goal of enabling precise organic solvent nanofiltration. Self-assembled membranes with uniform pore sizes tunable in 0.1-nm steps have been developed for organic solvent nanofiltration.
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