期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 2, 页码 2067-2074出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b11777
关键词
graphene; graphene oxide; membrane; solvent transport; organic solvent; nanofiltration
资金
- Australian Research Council [LP 140100959]
- University of Kentucky by NSF KY EPSCoR [1355438]
- NIH-NIEHS-SRC [P42ES007380]
- Monash Centre for Atomically Thin Materials (MCATM)
- ARC Research Hub for Graphene Enabled Industry Transformation [IH 150100003]
- Office Of The Director
- Office of Integrative Activities [1355438] Funding Source: National Science Foundation
Solvent transport in membranes composed of stacked sheets of graphene oxide (GO) with molecular scale channels and a complex arrangement of hydrophobic and hydrophilic domains is not well understood. Here, we observe that the interlayer space between GO sheets expands in different solvents without disturbing the membrane integrity and is typically larger in aqueous media compared to nonaqueous media. However, the membranes have a tighter molecule sieving feature in aqueous media as demonstrated by lower permeance and higher solute rejection arising from interfacial water layers sticking to charged polar groups. As a result of this polar interaction, the permeance of polar solvents in GO membrane scales inversely to the polarity of the solvent, which is contrary to other polymeric and ceramic hydrophilic membranes and also scales inversely to the viscosity of solvents as per continuum expectations. We highlight the extended solvent-handling space of GO membranes, such as in polar protic, polar aprotic, and nonpolar solvents, demonstrating versatility over a commercial nanofiltration membrane, and we predict exciting new applications in advanced separation engineering.
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