摘要
高效去除污水中亚微米级污染物颗粒的分离膜是研究学者们一直关注的热点。文中利用静电纺丝技术制备出多种结构聚醚砜(PES)纤维过滤膜,系统研究了PES纤维过滤膜的通量及孔隙率变化规律,并以0.5μm和0.2μm聚苯乙烯(PS)作为亚微米级颗粒模板,研究PES纤维过滤膜的过滤性能。研究结果表明,当纤维直径相近时,串珠结构纤维过滤膜的孔隙率和通量均高于光滑结构,但截留率较低。随着纤维膜厚度的增加,PES纤维膜的孔隙率和通量均减小,截留率增加。通过对比纤维膜对不同尺寸PS颗粒的截留性能,分析其截留机理。最后通过研究纤维膜的抗污性能发现串珠结构的纤维膜有更优异的抗污性能。所制备的PES纤维过滤膜有望在污水净化实际过程中对亚微米颗粒完成高效分离。
The objectives of this study were to prepare different structures of polyethersulfone(PES)fibrous membranes by electrospinning technology.The morphology and porosity of PES fibrous membranes were systematically studied.Polystyrene(PS)with 0.5μm and 0.2μm was used as submicron particle template to study the filtration performance.The results represent that the porosity and flux of PES fibrous membranes with bead structure are higher than those of the smooth one.However,the rejection rate is lower.Meanwhile,the porosity and flux of PES fibrous membranes decrease and the rejection increases with the increase of the thickness of PES fibrous membranes.The rejection mechanism of PES fibrous membranes was explored through comparing the rejection to different size PS microspheres.Finally,the antifouling performance of the fiber membranes was also studied.It is found that the fiber membrane with bead structure has better antifouling performance than the smooth one.The prepared PES fiber filter membranes are expected to separate submicron particles efficiently in the sewage purification process.
作者
卫志美
刘振艳
王劭妤
杨杰
曾威
王孝军
Zhimei Wei;Zhenyan Liu;Shaoyu Wang;Jie Yang;Wei Zeng;Xiaojun Wang(Institute of Materials Science and Technology,Sichuan University,Chengdu 610064,China;State Key Laboratory of Polymer Materials Engineering(Sichuan University),Chengdu 610065,China;College of Polymer Science and Engineering,Sichuan University,Chengdu 610065,China;School of Material Science and Chemical Engineering,Tianjin Universuty of Science&Technology,Tianjin 300457,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2020年第11期101-108,共8页
Polymer Materials Science & Engineering
基金
国家自然科学基金委面上项目(51573103)。
关键词
静电纺丝
纤维膜
过滤性能
结构形貌
electrospinning
fibrous membrane
filtration performance
morphology
