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Enhanced water permeation through sodium alginate membranes by incorporating graphene oxides
Cao, KT; Jiang, ZY; Zhao, J; Zhao, CH; Gao, CY; Pan, FS; Wang, BY; Cao, XZ; Yang, J;王宝义; Cao XZ(曹兴忠); Yang J(杨静)
2014
发表期刊JOURNAL OF MEMBRANE SCIENCE
卷号469页码:272-283
摘要Pristine graphene oxide (pGO) and reduced graphene oxide (rGO) nanosheets with different physical and chemical structures were prepared, and blended into sodium alginate matrix to fabricate two types of hybrid membranes. Compared with pGO, rGO possessed smaller nanosheet size, more structural defects, less negative charges, less oxygen-containing groups, and more non-oxide regions. The hybrid membranes exhibited brick-and-mortar morphology, unusual crystallinity change, and increased free volume. Swelling resistance and mechanical stability of the hybrid membranes were both enhanced. Pervaporation dehydranon was conducted utilizing ethanol/water mixture as model to explore the selective water permeation through hybrid membranes. Due to synergy between permselectivity of water channels and crystallinity of polymer matrix, the hybrid membranes, particularly for rGO-filled membranes, exhibited improved separation performance with increased separation factor and an unusual change of permeation flux. When the rGO content was 1.6 wt%, optimum separation performance with a separation factor of 1566 and a permeation flux of 1699 g/(m(2)h) was achieved. The transport mechanism was investigated based on transport property comparison of the two types of membranes, revealing that more water channels with higher selectivity could be constructed and controlled by graphene oxide structure. Moreover, the hybrid membrane displayed a good long-term operation stability. (C) 2014 Elsevier B.V. All rights reserved.
关键词Graphene oxides Hybrid membrane Water channel Crystallinity Pervaporation dehydration
学科领域Engineering; Polymer Science
DOI10.1016/j.memsci.2014.06.053
收录类别SCI
WOS记录号WOS:000341141300027
引用统计
被引频次:69[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225117
专题多学科研究中心
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GB/T 7714
Cao, KT,Jiang, ZY,Zhao, J,et al. Enhanced water permeation through sodium alginate membranes by incorporating graphene oxides[J]. JOURNAL OF MEMBRANE SCIENCE,2014,469:272-283.
APA Cao, KT.,Jiang, ZY.,Zhao, J.,Zhao, CH.,Gao, CY.,...&杨静.(2014).Enhanced water permeation through sodium alginate membranes by incorporating graphene oxides.JOURNAL OF MEMBRANE SCIENCE,469,272-283.
MLA Cao, KT,et al."Enhanced water permeation through sodium alginate membranes by incorporating graphene oxides".JOURNAL OF MEMBRANE SCIENCE 469(2014):272-283.
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