Molecular Bridges Stabilize Graphene Oxide Membranes in Water

被引:218
|
作者
Zhang, Mengchen [1 ]
Mao, Yangyang [1 ]
Liu, Guozhen [1 ]
Liu, Gongping [1 ]
Fan, Yiqun [1 ]
Jin, Wanqin [1 ]
机构
[1] Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 210009, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
graphene oxide; molecular bridges; nanofiltration; stability; NANOFILTRATION MEMBRANES; FRAMEWORK MEMBRANES; COMPOSITE MEMBRANES; ENHANCED STABILITY; TRANSPORT; DIFFUSION; CHANNELS; POLYMER;
D O I
10.1002/anie.201913010
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Recent innovations highlight the great potential of two-dimensional graphene oxide (GO) films in water-related applications. However, undesirable water-induced effects, such as the redispersion and peeling of stacked GO laminates, greatly limit their performance and impact their practical application. It remains a great challenge to stabilize GO membranes in water. A molecular bridge strategy is reported in which an interlaminar short-chain molecular bridge generates a robust GO laminate that resists the tendency to swell. Furthermore, an interfacial long-chain molecular bridge adheres the GO laminate to a porous substrate to increase the mechanical strength of the membrane. By rationally creating and tuning the molecular bridges, the stabilized GO membranes can exhibit outstanding durability in harsh operating conditions, such as cross-flow, high-pressure, and long-term filtration. This general and scalable stabilizing approach for GO membranes provides new opportunities for reliable two-dimensional laminar films used in aqueous environments.
引用
收藏
页码:1689 / 1695
页数:7
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