Wood-Derived Nanofibrillated Cellulose Hydrogel Filters for Fast and Efficient Separation of Nanoparticles
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- Wood-Derived Nanofibrillated Cellulose Hydrogel Filters for Fast and Efficient Separation of Nanoparticles
- Wang, Yushu; Wang, Jialiang; Ling, Shengjie; Liang, Haiwei; Dai, Ming; Bai, Lulu; Li, Qing; Fan, Zhuangjun; Lee, Sang-Young; Yu, Haipeng; Liu, Shouxin; Wang, Qingwen; Liu, Yixing; Li, Jian; Sun, Tianmeng; Chen, Wenshuai
- Issue Date
- WILEY-V C H VERLAG GMBH
- ADVANCED SUSTAINABLE SYSTEMS, v.3, no.9, pp.1900063
- 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.
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