期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 11, 页码 5044-5050出版社
AMER CHEMICAL SOC
DOI: 10.1021/am400847m
关键词
triblock terpolymer; self-assembly; composite membrane; ultrafiltration; water treatment; size selective rejection
资金
- National Science Foundation through the University of Minnesota MRSEC [DMR-0819885]
- National Science Foundation [DMR-1006370]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1006370] Funding Source: National Science Foundation
Ultrafiltration membranes with an 80 nm thick block polymer derived selective layer containing 20 nm cylindrical pores were prepared by removing poly(lactide) (PLA) from a poly(styrene)-b-poly(isoprene)-b-poly(lactide) (PS-PI-PLA) film onto a microporous polymer support. The block polymer film adopted a core(PLA)-shell(PI) cylindrical morphology in which vertically-oriented PLA cylinders were degraded to leave PI-lined channels in a PS matrix. Thanks to the combination of PS and PI in the nanoporous matrix, chemical cross-linking was not needed et to provide mechanical stability in the thin film. The membranes showed a hydraulic flux of 165 L m(-2) h(-1) bar(-1) and were able to size discriminate poly(ethylene oxide) (PEO) solutes in agreement with theoretical predictions.
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