Large-area graphene-based nanofiltration membranes by shear alignment of discotic nematic liquid crystals of graphene oxide

被引:603
作者
Akbari, Abozar [1 ]
Sheath, Phillip [1 ]
Martin, Samuel T. [1 ]
Shinde, Dhanraj B. [1 ]
Shaibani, Mahdokht [1 ]
Banerjee, Parama Chakraborty [1 ]
Tkacz, Rachel [1 ]
Bhattacharyya, Dibakar [2 ]
Majumder, Mainak [1 ]
机构
[1] Monash Univ, Dept Mech & Aerosp Engn, Nanoscale Sci & Engn Lab, Clayton, Vic 3800, Australia
[2] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA
来源
NATURE COMMUNICATIONS | 2016年 / 7卷
基金
澳大利亚研究理事会; 美国国家科学基金会;
关键词
WATER DESALINATION; INTERFACIAL-TENSION; DISPERSIONS; PERMEATION; FLOW; TRANSPARENT; FABRICATION; ADSORPTION; MOLECULES; HYDRATION;
D O I
10.1038/ncomms10891
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Graphene-based membranes demonstrating ultrafast water transport, precise molecular sieving of gas and solvated molecules shows great promise as novel separation platforms; however, scale-up of these membranes to large-areas remains an unresolved problem. Here we demonstrate that the discotic nematic phase of graphene oxide (GO) can be shear aligned to form highly ordered, continuous, thin films of multi-layered GO on a support membrane by an industrially adaptable method to produce large-area membranes (13 X 14 cm(2)) in <5 s. Pressure driven transport data demonstrate high retention (490%) for charged and uncharged organic probe molecules with a hydrated radius above 5 A as well as modest (30-40%) retention of monovalent and divalent salts. The highly ordered graphene sheets in the plane of the membrane make organized channels and enhance the permeability (71 +/- 5lm(-2) hr(-1) bar(-1) for 150 +/- 15 nm thick membranes).
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页数:12
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