期刊
RSC ADVANCES
卷 5, 期 26, 页码 19859-19864出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra15482g
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资金
- Zhejiang Provincial Natural Science Foundation of China [LR12B06001]
- National Basic Research Program of China [2011CB710804]
- National Hi-Tech Research and Development Program of China [2012AA022303]
- State Key Laboratory of Motor Vehicle Biofuel Technology [2013008]
To retain the hydroxyl group of poly(vinyl alcohol) (PVA), ammonium persulfate (APS) was used to initiate the polymerization of hydrogen on the PVA chain. Rather than hydroxyl-based cross-linking, the generated PVA macromolecule radicals were cross-linked with N,N '-methylene bisacrylamide (MBA) to prepare PVA membranes. The PVA membranes were shown to be successfully cross-linked via FT-IR characterization, as well as measurements of swelling degree and gel fraction. With increasing the content of cross-linker, the swelling degree of the membranes decreased, and the gel fraction increased. The pervaporation performance of the membrane was investigated by separating 95 wt% ethanol aqueous solutions. The cross-linked PVA membrane containing 0.5 wt% cross-linker yielded a high permeate water content (99 wt%) and a total flux of 353 g m(-2) h(-1) at 40 degrees C. As the feed temperature increased, the total flux increased, while the permeate water content decreased. The cross-linked membrane exhibited good durability over long-term operation.
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