期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 5, 页码 7358-7368出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c23811
关键词
bionic membrane; thin-film composite; skin simulation; collagen fibril; dye/salt separation
资金
- National Natural Science Foundation of China [21908076, 21706035]
- Fundamental Research Funds for the Central Universities [JUSRP12005]
A skin-simulated thin-film-composite membrane with a controllable thickness, morphology, and hydrophilicity of the selective layer was fabricated using a vacuum-assisted interfacial polymerization method. The optimal membrane, decorated with collagen fibrils, showed high water permeability and impressive rejections towards dyes while maintaining high permeations of salts.
A skin-simulated thin-film-composite membrane was fabricated using a vacuum-assisted interfacial polymerization method. A negatively charged surface-selective layer on a polyacrylonitrile (PAN) substrate was cross-linked using trimesoyl chloride to form polyamide and polyester with a three-layer structure that was similar to skin. The loading of collagen fibrils assembled on the membrane surface was varied, and a selective layer was obtained, of which the thickness, morphology, and hydrophilicity can be manipulated. The optimal membrane decorated with 0.5 mg of collagen fibril had a selective layer thickness of around 130 nm with pure water permeability up to 84.7 LMH bar(-1). Furthermore, the membrane exhibited impressive rejections toward dyes (Congo red with a molecular weight of 696.68 Da: 99.6%, reactive blue 19 with a molecular weight of 626.54 Da: 99.8%, and Coomassie blueG-250 with a molecular weight of 854.02 Da: 98.6%) while high permeations of Na2SO4 and NaCl were achieved. This facile strategy provides a useful guideline for constructing bionic membranes through biomaterials.
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