期刊
JOURNAL OF MEMBRANE SCIENCE
卷 662, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2022.121022
关键词
Block copolymer; Responsive membrane; CO2 response; Selective swelling; Biomolecule separation
资金
- Natural Science Foundation of Jiangsu Province
- National Natural Science Foundation of China
- [BK20190671]
- [21908095]
- [21825803]
Intelligent responsive membranes have attracted much attention due to their ability to reversibly change separation performances under environmental stimulation. This study develops responsive membranes from block copolymers using CO2 gas as a stimulus. The membranes exhibit nano-porous structures and CO2-responsive chains, enabling controllable regulation of water permeance and protein separation.
The intelligent responsive membranes have aroused much attention due to their distinctive capability to reversibly change separation performances under the stimulation of ambient environment. Especially, the responsive membranes derived from block copolymers, which have regular nanoporous structures, display great potential in high-precision controllable separation. Herein, we use CO 2 gas as the non-toxic, mild stimulus, and develop the responsive membranes from a block copolymer of poly(2-diethylaminoethyl methacrylate)-block-polystyrene (PDEAEMA-b-PS) by the selective swelling method. The membranes exhibit a bi-continuous nano-porous structure and the surfaces and pore walls are rich with CO2-responsive PDEAEMA chains. Based on the reversible conformation transition of PDEAEMA chains between the collapsed state and extended state upon CO2/N-2 stimulation, the membranes achieve the controllable regulation on the water permeances from similar to 100 to similar to 2100 L.h(-1).m(-2).bar(-1), also realize the blocking/passing switch for varied proteins. More importantly, the extended PDEAEMA chains shrink the effective pore size down to less than 5 nm, moving the separation scope from ultrafiltration to tight-ultrafiltration. Thus, the membranes are capable to separate macromolecular proteins with small molecule polypeptide and vitamin with high separation efficiencies, demonstrating their application prospect in precise separation and fractionation of biomolecules.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据