UV-crosslinked chitosan/polyvinylpyrrolidone blended membranes for pervaporation

UV-crosslinked chitosan/polyvinylpyrrolidone blended membranes for pervaporation
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用于渗透汽化的紫外交联壳聚糖/聚乙烯吡咯烷酮共混膜

DOI:
10.1039/c2ra21827e
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发表时间:
2013-01
期刊:
影响因子:
3.9
通讯作者:
Liu, Qing Lin
Liu, Qing Lin
中科院分区:
化学3区
文献类型:
--
作者:
Zhang, Qiu Gen;Hu, Wen Wei;Zhu, Ai Mei;Liu, Qing Lin

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壳聚糖是一种重要的生物大分子,聚乙烯吡咯烷酮(PVP)是一种生物相容性合成聚合物。通过紫外辐射制备交联壳聚糖/PVP 共混膜。所制备的膜具有高度交联的壳聚糖/PVP 网络结构,该结构源自 PVP 的自交联和在紫外线照射期间壳聚糖在 PVP 链上的支化。紫外交联显着提高了共混膜的机械强度和热稳定性。它们的最高拉伸强度是原始壳聚糖膜的两倍。在保持原始壳聚糖膜相同溶胀度的情况下,混合膜对甲醇和水具有高吸附选择性。所制备的膜在甲醇/乙二醇和水/乙醇的渗透汽化分离中表现出优异的性能,并且在作为新型生物医学材料以及从有机物中去除乙醇和水方面显示出巨大的潜力。
Chitosan is an important biomacromolecule and polyvinylpyrrolidone (PVP) is a biocompatible synthetic polymer. The crosslinked chitosan/PVP blended membranes were prepared via UV irradiation. The as-prepared membranes have a highly crosslinked chitosan/PVP network structure originated from self-crosslinking of PVP and branching of chitosan onto PVP chains during UV irradiation. UV-Crosslinking significantly enhanced the mechanical strength and thermal stability of the blended membranes. Their highest tensile strength is twice as much as that of the pristine chitosan membrane. Maintaining the same swelling degree of the pristine chitosan membrane, the blended membranes have high sorption selectivity towards methanol and water. The as-prepared membranes exhibit an excellent performance in pervaporation separation of methanol/ethylene glycol and water/ethanol and show great potential as new biomedical materials and in the removal of alcohol and water from organics.
DOI: 10.1016/j.seppur.2008.01.013
发表时间: 2008-08
影响因子: 8.6
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