Layer-by-layer self-assembled nanocomposite membranes via bio-inspired mineralization for pervaporation dehydration

被引:24
作者
Liu, Guanhua [1 ,2 ]
Jiang, Zhongyi [1 ,2 ]
Li, Changdong [1 ,2 ]
Hou, Lipeng [1 ,2 ]
Chen, Cheng [1 ,2 ]
Yang, Hao [1 ,2 ]
Pan, Fusheng [1 ,2 ]
Wu, Hong [1 ,2 ]
Zhang, Peng [3 ,4 ]
Cao, Xingzhong [3 ,4 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, Minist Educ, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China
[2] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Multidiscipline Res Div, Beijing 100049, Peoples R China
[4] Beijing Engn Res Ctr Radiog Tech & Equipment, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
Layer-by-layer (LbL) self-assembly; Nanocomposite membranes; Ultrathin membranes; Bio-inspired mineralization; Pervaporation dehydration; MIXED-MATRIX MEMBRANES; HYBRID MEMBRANES; GRAPHENE OXIDE; POLYMER MEMBRANES; SEPARATION; PERFORMANCE; TRANSFORMATION; SELECTIVITY; PERMEATION; ULTRATHIN;
D O I
10.1016/j.memsci.2018.09.067
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
To synthesize small and evenly distributed fillers in polymer matrix is important to fulfill the advantage of nanocomposite membranes in overcoming the tradeoff effect between permeability and selectivity. In this study, nanocomposite membranes were prepared by synthesizing calcium oxalate (CaOx) nanoparticles in confined space of the layer-by-layer (LbL) self-assembled polymer network through bio-inspired mineralization. The acfive layer was tightly coated on hydrolyzed polyacrylonitrile substrate with thickness less than 200 nm. The CaOx nanoparticles were uniformly distributed in the polymer matrix with diameter less than 50 nm. The hydrophilicity of the nanocomposite membranes was decreased due to the incorporation of CaOx nanoparticles. And the free volume properties were tuned by creating new polymer/filler interface. At precursor concentration of 1 mM, the permeation flux increased by 14% to 958 g/(m(2)h), the separation factor increased by 2.36 times to 1562 compared to the control membrane, and the membrane showed good operating stability.
引用
收藏
页码:44 / 52
页数:9
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