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Wood‐Derived Nanofibrillated Cellulose Hydrogel Filters for Fast and Efficient Separation of Nanoparticles
Author(s) -
Wang Yushu,
Wang Jialiang,
Ling Shengjie,
Liang Haiwei,
Dai Ming,
Bai Lulu,
Li Qing,
Fan Zhuangjun,
Lee SangYoung,
Yu Haipeng,
Liu Shouxin,
Wang Qingwen,
Liu Yixing,
Li Jian,
Sun Tianmeng,
Chen Wenshuai
Publication year - 2019
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201900063
Subject(s) - materials science , filtration (mathematics) , nanoparticle , nanoporous , cellulose , nanofiber , chemical engineering , porosity , nanotechnology , nanocellulose , composite material , engineering , statistics , mathematics
Fast water permeable filters with an efficient rejection ratio are desirable for nanoparticle separation and water/air purification. Ultrathin nanoporous filters are effective because of their features, including narrow and tunable pore size distributions capable of handling a high solvent flux. However, it remains challenging to develop antifouling filters that maintain a stable flux with high rejection efficiency over long‐term filtration of nanoparticle solutions. Here, a facile and low‐cost approach is reported to fabricate biocompatible hydrogel filters with interconnected nanofiber network structures through the use of high aspect ratio, wood‐derived nanofibrillated cellulose (NFC). The super‐hydrophilia and high porosity of these materials endow the NFC hydrogel filters (NFC‐HFs) with high solvent permeance. Nanofibrous networks and interconnected nanoporous structures of NFC‐HFs promote efficient rejection and precise size‐selective separation of nanoparticles. Specifically, small and irregular nanopores of NFC‐HFs fail to match the size of relatively large nanoparticles, which ensures a relatively stable flux of the NFC‐HFs over the whole filtration process, even under continuous filtration of highly concentrated nanoparticle solutions.