Vapor-phase crosslinked mixed matrix membranes with UiO-66-NH2 for organic solvent nanofiltration

被引:71
作者
Gao, Zhuo Fan [1 ]
Feng, Yingnan [1 ]
Ma, Dangchen [1 ]
Chung, Tai-Shung [1 ]
机构
[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore
基金
新加坡国家研究基金会;
关键词
Functionalized UiO-66; Mixed matrix membrane (MMM); Vapor-phase crosslinking (VPC); Surface modification; Organic solvent nanofiltration (OSN); FILM COMPOSITE MEMBRANES; P84 POLYIMIDE MEMBRANES; RESISTANT NANOFILTRATION; PERVAPORATION DEHYDRATION; SEPARATION PERFORMANCE; LINKING; OSN; ENHANCEMENT; FRAMEWORK; POLYMER;
D O I
10.1016/j.memsci.2018.12.064
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this work, a series of mixed matrix membranes (MMMs) containing nano- size amine-functionalized UiO-66 particles were vapor-phase crosslinked by tris (3-aminopropyl) amine (TAPA) and investigated for organic solvent nanofiltration (OSN) applications. A thin dense layer was successfully formed on top of MMMs which improved solute selectivity in isopropanol (IPA). By manipulating (1) the size and loading of UiO-66-NH2 nanoparticles in dope solutions, and (2) the temperature and duration of the TAPA vapor crosslinking reaction, we have fabricated a membrane with a 99.2% rejection towards negatively charged Rose Bengal (RB, Mw=1017 gmol(-1)) in IPA and a pure IPA flux of 11.5 Lm(-2) h(-1) at 10 bar. Interestingly, the optimal composite membrane developed in this study shows impressive rejections towards positively charged dyes possibly because of electrostatic repulsion (e.g., Donnan exclusion). In addition, the optimized TAPA vapor-phase crosslinked MMMs display stable performance in various organic solvents and the 14-day rejection test. To our best knowledge, this is the first report on organic solvent nanofiltration MMMs made from the vapor-phase crosslinking modification. This modification method may have great potential to develop next-generation OSN membranes for the separation of organic solvents and solutes in pharmaceutical and food industries.
引用
收藏
页码:124 / 135
页数:12
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