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Cross-linking modification with diamine monomers to enhance desalination performance of graphene oxide membranes
Qian, Yunlong; Zhou, Chen; Huang, Aisheng
2018
发表期刊CARBON
卷号136页码:28-37
摘要Two kinds of diamine molecules, including 1, 4-cyclohyxanediamine (CDA) and p-phenylenediamine (pPDA), were used as cross-linking for modification of graphene oxide (GO) nanosheets to prepare three-dimensional graphene oxide framework (GOF). Thereafter, graphene oxide composite membranes (GOCMs) were prepared on the polydopamine (PDA) modified alpha-Al2O3 tubes via vacuum filtration of GOF suspension. The separation performance of the GOCMs was tested for seawater desalination by pervaporation. The cross-linking modification, membrane thickness, operation temperature, feed concentration and PDA modification of alpha-Al2O3 tube have great effect on the separation performance of the GOCMs. Attributing to the enhancement of d-spacing and surface hydrophilicity after CDA modification, the CDA-based GOCM (CDA-GOCM) shows a higher water flux (20.1 kg m(-2) h(-1) with ion rejection of 99.9%) for desalination of 3.5 wt% seawater at 90 degrees C, which is higher than that of GO membrane (11.4 kg m(-2) h(-1) with ion rejection of 99.9%). However, since the hydrophilicity of the GO markedly decreases after pPDA modification, the pPDA-based GOCM (pPDA-GOCM) show a lower water flux (10.7 kg m(-2) h(-1) with ion rejection of 99.8%) at 90 degrees C. Further, the CDA-GOCM prepared on the PDA-modified alpha-Al2O3 tubes displays high stability for desalination of 3.5 wt% seawater. (C) 2018 Elsevier Ltd. All rights reserved.
关键词Mixed Matrix Membranes Functionalized Graphene Seawater Desalination Framework Membranes Pervaporation Water Dehydration Separation Energy Electrodialysis
学科领域Materials Science
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/17233
专题2018专题
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GB/T 7714
Qian, Yunlong,Zhou, Chen,Huang, Aisheng. Cross-linking modification with diamine monomers to enhance desalination performance of graphene oxide membranes[J]. CARBON,2018,136:28-37.
APA Qian, Yunlong,Zhou, Chen,&Huang, Aisheng.(2018).Cross-linking modification with diamine monomers to enhance desalination performance of graphene oxide membranes.CARBON,136,28-37.
MLA Qian, Yunlong,et al."Cross-linking modification with diamine monomers to enhance desalination performance of graphene oxide membranes".CARBON 136(2018):28-37.
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