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Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization
Liu, GH; Jiang, ZY; Cheng, XX; Chen, C; Yang, H; Wu, H; Pan, FS; Zhang, P; Cao, XZ; Zhang P(张鹏); Cao XZ(曹兴忠)
2016
发表期刊JOURNAL OF MEMBRANE SCIENCE
卷号520页码:364-373
文章类型期刊论文
摘要Layer-by-layer (LbL) assembly is a common method for controlled fabrication of ultrathin membranes, while bioinspired mineralization is a novel method for controlled synthesis of well-dispersed inorganic particles in hybrid membranes. Here, bioinspired mineralization was integrated with LbL assembly to prepare ultrathin polymer-inorganic hybrid membranes by in situ precipitating silica nanopartides into alternatively assembled polyethyleneimine (PEI) and sodium alginate (Alg). The membrane thickness was manipulated by varying the bilayer numbers. And the synthesized silica nanoparticles were revealed by the surface morphology, Si mapping and chemical properties of the membranes. The surface hydrophilicity, diffusion selectivity and the fractional free volume of the hybrid membranes were all enhanced by the incorporation of silica nanoparticles. As a result, the ultrathin hybrid membrane showed elevated selectivity (2.66-fold higher than that of control membrane) with almost unchanged permeability when used for pervaporation dehydration of 90 wt% ethanol aqueous solution as a model mixture. This study indicates the great potential for overcoming the tradeoff hurdle between permeability and selectivity by the synergy of LbL assembly and bioinspired mineralization to fabricate ultrathin hybrid membranes. (C) 2016 Elsevier B.V. All rights reserved.
关键词Layer-by-layer assembly Bioinspired mineralization Hybrid membrane Tradeoff Dehydration
DOI10.1016/j.memsci.2016.07.056
关键词[WOS]MIXED-MATRIX MEMBRANES ; PERVAPORATION DEHYDRATION PERFORMANCE ; POLYELECTROLYTE MULTILAYER MEMBRANES ; ULTRATHIN HYBRID MEMBRANE ; SODIUM ALGINATE MEMBRANE ; EFFICIENT CO2 SEPARATION ; SELF-ASSEMBLY DRIVEN ; COMPOSITE MEMBRANES ; NANOCOMPOSITE MEMBRANES ; ETHANOL DEHYDRATION
语种英语
WOS类目Engineering, Chemical ; Polymer Science
WOS记录号WOS:000384785000037
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260317
专题多学科研究中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Liu, GH,Jiang, ZY,Cheng, XX,et al. Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization[J]. JOURNAL OF MEMBRANE SCIENCE,2016,520:364-373.
APA Liu, GH.,Jiang, ZY.,Cheng, XX.,Chen, C.,Yang, H.,...&曹兴忠.(2016).Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization.JOURNAL OF MEMBRANE SCIENCE,520,364-373.
MLA Liu, GH,et al."Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization".JOURNAL OF MEMBRANE SCIENCE 520(2016):364-373.
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