期刊
NANO LETTERS
卷 16, 期 6, 页码 3795-3800出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b01195
关键词
Silk nanofibrils; ultrathin membrane; filtration; separation
类别
资金
- NIH [U01EB014976]
- AFOSR [FA9550-11-1-0199]
We report a new ultrathin filtration Membrane prepared:from silk nanofibrils (SNFs), directly exfoliated from natural Bombyx mori silk fibers to retain structure and:physical properties. These Membranes can be prepared with a thickness down to 40 nm with a narrow distribution of pore sizes ranging from 8 to 12 nm. Typically, 40 nm thick membranes prepared from SNFs have pure water fluxes of 13 000 L h(-1) m(-2) bar(-1); more than 1:000 times higher than most commercial ultrathin filtration membranes and comparable with the highest water flux reported previously. The commercial membranes are Commonly prepared from polysulfone, poly(ether sulfone), and polyamide. The SNF-based ultrathin membranes exhibit efficient separation for dyes, proteins, and colloids of nanoparticles with at least a 64% rejection of Rhodamine B. This broad-spectrum filtration membrane would have potential utility in applications such as wastewater treatment, nanotechnology, food industry, and life sciences in part due to the protein-based membrane polymer (silk), combined with the robust mechanical and separation performance, features.
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