渗透
膜
正渗透
溶剂
水溶液
化学工程
纳滤
材料科学
反渗透
盐(化学)
纳米技术
化学
有机化学
渗透
生物化学
工程类
作者
Liang Ma,Xiao Han,Shengping Zhang,Luda Wang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-08-10
卷期号:5 (8): 11324-11333
被引量:7
标识
DOI:10.1021/acsanm.2c02435
摘要
The organic solvent forward osmosis (OSFO) process provides unprecedented opportunities for simultaneous concentration of active pharmaceutical ingredients (APIs) and recovery of organic solvents. However, the fabrication of membranes with precise sieving effects that can realize high solvent permeance and minimize reverse salt flux remains an enormous challenge. Through engineering the functionality of artificial subnanochannels, here, we report a metal–organic framework (MOF)-based membrane with ion-selective subnanochannels to achieve excellent OSFO performance, which overcomes the trade-off between solvent permeance and reverse salt flux. The sulfonated NH2-UiO-66 (SA-NH-UiO-66) composite membranes effectively inhibit the conduction of LiCl in aqueous and organic solutions driven by a potential difference, with conductivities of up to 2 orders of magnitude lower than that of the porous polymer substrate, which is mainly attributed to the high-density sulfonic acid groups that offer negative charges and narrow down the channel size of the MOF membrane. Moreover, the SA-NH-UiO-66 membranes have well-defined pore sizes and high porosity, showing a methanol permeance of 40.2 LMH, a low reverse salt flux of 2.1 gMH, and a 99% rejection of APIs under the osmotic pressure in the OSFO process, which surpass those of state-of-the-art polymer membranes. This work sheds light on developing artificial ion-selective subnanochannel-based membranes for sustainable separation in the pharmaceutical industry.
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