摘要
采用涂覆法将PVA-CS混合溶液涂覆在PHBV静电纺纤维膜表面,考察不同PVA/CS溶液的配比对PVA-CS/PHBV复合膜性能的影响.PVA/CS涂覆液的黏度及用量将影响复合膜的结构形态.通过SEM对复合膜的表面形态进行表征,结果发现8%PVA^2.5%CS/8%PHBV浓度下,PVA与CS溶液的体积比为5∶5时的复合膜具有光滑均匀、平整致密的涂覆层,以及直径均匀且无串珠的纤维层.实验进一步对复合膜的过滤性能进行了测试,其纯水通量可达6.41×103 L/(m2·h),对卵清蛋白的截留率达到89.94%,并且对铜、铅、镉等重金属离子及分散性染料都展现出良好的吸附性和过滤性.
PVA-CS/PHBV composite membranes were prepared by coating the PVA/CS solution on the surface of PHBV electrospun fibers.The properties of PVA-CS/PHBV composite membranes were investigated throught adjusting the volume ratio of PVA/CS.The viscosity and mass ratio of PVA/CS were the main factors that influenced on the morphology of the PVA-CS/PHBV composite membranes.SEM was used to observe the surface and cross-sectional morphology of these membranes.The uniform PHBV fibers as based layer could be obtained at 8％.After adjusting the proper PVA/CS solutions,the smooth and fully CS-PVA coated layer was covered on the PHBV scaffold surface as 8％ PVA-2.5％CS （PVA/CS,5 ∶ 5）.As the results,the permeate flux and ovalbumin rejection of PVA-CS/PHBV composite membranes could reach 6.41× 103 L/（m2 · h） and 89.94％,respectivily.Further more,the composite membranes exhibited good adsorption and separation of heavy metal ion and disperse dyes.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2014年第3期63-68,共6页
Membrane Science and Technology
基金
国家自然科学基金青年基金项目(51103016)
江苏省自然科学基金项目(BK2011241)
东华大学纤维改性国家重点实验室项目(LK1001)
