Spray-assisted LBL assembly of chitosan/nanocellulose as coatings of commercial membranes for oil-in-water emulsion separation

被引:9
作者
Cai, Jiaqian [1 ]
Chen, Qianqian [1 ]
Chang, Chunyu [1 ]
机构
[1] Wuhan Univ, Coll Chem & Mol Sci, Engn Res Ctr Nat Polymer Based Med Mat Hubei Prov, Lab Biomed Polymers,Minist Educ, Wuhan 430072, Peoples R China
基金
中国国家自然科学基金;
关键词
Chitosan; Cellulose nanofiber; Layer -by -layer assembly; Oil; water separation; Membrane; OIL/WATER SEPARATION; NANOCELLULOSE; MESH;
D O I
10.1016/j.ijbiomac.2023.124852
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Owing to the limitation of their wettability and pore size, lab filter membranes could not separate oil/water emulsions. Herein, we present surface modification of commercial membranes with chitosan/nanocellulose coatings via a spray-assisted layer-by-layer (LBL) assembly technology. By alternate spraying chitosan (CS) solution and TEMPO-oxidized tunicate cellulose nanofiber (TCNF) suspension, (CS/TCNF)n multilayers were obtained, where n denotes the number of bilayers. The (CS/TCNF)6 coated membrane possessed superhydrophilicity, underwater superoleophobicity, and outperforming anti-oil-fouling properties, which could effectively separate various oil-in-water emulsions. Importantly, the (CS/TCNF)6 coated membrane not only had stable permeate flux with nearly 100 % recovery ratio for the separation of pump oil-in-water emulsion, but also exhibited good harsh-environment-tolerant property. This work provided a novel strategy for designing and preparing stable anti-oil-fouling membranes for oily wastewater treatment.
引用
收藏
页数:9
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