期刊
NANO LETTERS
卷 13, 期 11, 页码 5323-5328出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl402829p
关键词
Block copolymer self-assembly; non-solvent induced phase separation; asymmetric membrane; titanium dioxide; filtration
类别
资金
- National Science Foundation [DMR-1104773, DMR-1120296]
- NSF Graduate Research Fellowship Program (GRFP)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1104773] Funding Source: National Science Foundation
A facile method for forming asymmetric organic-inorganic hybrid membranes for selective separation applications is developed. This approach combines co-assembly of block copolymer (BCP) and inorganic nanoparticles (NPs) with non-solvent induced phase separation. The method is successfully applied to two distinct molar mass BCPs with different fractions of titanium dioxide (TiO2) NPs. The resulting hybrid membranes exhibit structural asymmetry with a thin nanoporous surface layer on top of a macroporous fingerlike support layer. Key parameters that dictate membrane surface morphology include the fraction of inorganics used and the length of time allowed for surface layer development. The resulting membranes exhibit both good selectivity and high permeability (3200 +/- 500 Lm(-2) h(-1) bar(-1)). This fast and straightforward synthesis method for asymmetric hybrid membranes provides a new self-assembly platform upon which multifunctional and high-performance organic-inorganic hybrid membranes can be formed.
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