期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 34, 期 2, 页码 190-194出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201200680
关键词
additives; block copolymers; hydrogen bonding; membranes
资金
- FP7 EU-project SELFMEM [NMP3-SL-2009-228652]
Highly porous polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) diblock copolymer membranes are prepared using carbohydrates as additives. Therefore alpha-cyclodextrine, alpha-(D)-glucose, and saccharose (cane sugar) are tested for the membrane formation of three different PS-b-P4VP polymers. The addition of the carbohydrates leads to an increasing viscosity of the membrane solutions due to hydrogen bonding between hydroxyl groups of the carbohydrates and pyridine units of the block copolymer. In all cases, the membranes made from solution with carbohydrates have higher porosity, an improved narrow pore distribution on the surface and a higher water flux as membranes made without carbohydrates with the same polymer, solvent ratio, and polymer concentration.
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