Flexible,durable,and anti-fouling nanocellulose-based membrane functionalized by block copolymer with ultra-high flux and efficiency for oil-in-water emulsions separation  

作　　者：Jianfei Wu Yuxuan Su Ziwei Cui Yang Yu Jiafu Qu Jundie Hu Yahui Cai Jianzhang Li Dan Tian Qichun Zhang 

机构地区：[1]Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China [2]School of Materials Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China [3]Department of Materials Science and Engineering&Center of Super-Diamond and Advanced Films(COSDAF),City University of Hong Kong,Hong Kong 999077,China

出　　处：《Nano Research》2023年第4期5665-5675,共11页纳米研究（英文版）

基　　金：the financial support provided by the National Natural Science Foundation of China(Nos.22108125,21971113,and 22175094);Independent Innovation of Agricultural Science and Technology in Jiangsu Province(Nos.CX(21)3166,and CX(21)3163);the Natural Science Foundation of Jiangsu Province(No.BK20210627);Doctor Project of Mass Entrepreneurship and Innovation in Jiangsu Province(No.JSSCBS20210549);Nanjing Science&Technology Innovation Project for Personnel Studying Abroad and Research Start-up Funding of Nanjing Forestry University(No.163020259);Q.C.Z.appreciates the funding support from City University of Hong Kong and Hong Kong Institute for Advanced Study,City University of Hong Kong.

摘　　要：The clearwater obtained from stabilized oily wastewater has become a worldwide challenge.Nowdays,the area of oil/water emulsion separation materials have accomplished great progress,but still faces the enormous problems of low flux,poor stability,and pollution resistance.Nanocelluloses(cellulose nanocrystals(CNC))with the advantages of hydrophilicity,ecofriendliness,and regeneration are ideal materials for the construction of separation membranes.In this paper,a flexible,antifouling,and durable nanocellulose-based membrane functionalized by block copolymer(poly(N-isopropylacrylamide)-b-poly(N,Ndimethylaminoethyl methacrylate))is prepared via chemical modification and self-assembly,showing high separation efficiency(above 99.6%)for stabilized oil-in-water emulsions,excellent anti-fouling and cycling stability,high-temperature resistance,and acid and alkali resistance.More importantly,the composite membrane has ultra-high flux in separating oil-in-water emulsions(29,003 L·m^(−2)·h^(−1)·bar^(−1))and oil/water mixture(51,444 L·m^(−2)·h^(−1)·bar^(−1)),which ensures high separation efficiency.With its durability,easy scale-up,and green regeneration,we envision this biomass-derived membrane will be an alternative to the existing commercial filter membrane in environmental remediation.

关 键 词：nanocellulose-based membrane oil/water emulsions separation ultra-high flux good durability anti-fouling property 

分 类 号：O63[理学—高分子化学]