Cellulose nanofiber-based nanofiltration membranes for sustainable water purificationOA
Although nanofiltration(NF)membranes enable energy-efficient molecular separations critical for a sustainable ecosystem,their conventional fabrication from petrochemical polymers raises end-of-life environmental concerns.Cellulose nanofiber(CNF),as a biodegradable and renewable biomass material,offers a promising green alternative for NF membrane production.However,fabricating dense NF membranes from highly concentrated CNF suspensions remains challenging due to their high viscosity and poor film-forming properties.In this work,we overcame these limitations through an acidification-assisted process that disrupted the CNF gel network,enabling improved processability.Subsequent crosslinking with glutaraldehyde and thermal-induced formation yielded a robust and dense NF membrane with tailored nanostructure.The optimized membrane exhibited effective separation performance,achieving approximately 90%rejection of Na_(2)SO_(4)and 99.4%removal of humic acid while maintaining a water flux over 20 L m^(-2)h^(-1).This work proposes a sustainable fabrication route for high-performance nanocellulose membranes,establishing a renewable alternative to conventional petrochemical-based water purification filtration materials.
Ge Li;Xinchen Xiang;Yunlong Cui;Xiaolu Ni;Kailun Zou;Guozhong Shi;Zhikan Yao;Lin Zhang
Key Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,ChinaKey Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,ChinaKey Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,ChinaZhejiang Tailin Life Science Co.,Ltd.,Hangzhou,310051,ChinaZhejiang Tailin Life Science Co.,Ltd.,Hangzhou,310051,ChinaKey Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,China Engineering Research Center of Novel Water Source for Industry of Zhejiang Province,Zhejiang Energy R&D Institute Co.,Ltd.,Hangzhou,311121,ChinaKey Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,China Future Environment Laboratory,Innovation Center of Yangtze River Delta,Zhejiang University,Jiaxing,314100,ChinaKey Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,China Future Environment Laboratory,Innovation Center of Yangtze River Delta,Zhejiang University,Jiaxing,314100,China
化学化工
Nanofiltration membraneCellulose nanofiberCross-linkingWater purification
《Green Energy & Environment》 2026 (5)
P.1402-1413,12
financial support from the National Natural Science Foundation of China(22138010,22478338 and 22421004)the“Pioneer”and“Leading Goose”R&D Program of Zhejiang(2025C02226)the Fundamental Research Funds for the Central Universities(226-2025-00011)the Research Fund from Ecological Civilization Project of Zhejiang University.
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