无机材料学报 ›› 2020, Vol. 35 ›› Issue (12): 1333-1339.DOI: 10.15541/jim20200182

• 研究论文 • 上一篇    下一篇

共挤出法制备双层中空纤维陶瓷复合膜

刘金云(),张玉亭,洪周,刘华,王圣贤,顾学红()   

  1. 南京工业大学 化工学院, 材料化学工程国家重点实验室, 南京 210009
  • 收稿日期:2020-04-07 修回日期:2020-06-12 出版日期:2020-12-20 发布日期:2020-07-10
  • 作者简介:刘金云(1994–), 女, 硕士研究生. E-mail: 1158381254@qq.com
  • 基金资助:
    国家自然科学基金面上项目(21776128);江苏省“333高层次人才培养工程”资助项目(第二层次);江苏省自然科学基金青年项目(BK20170132)

Fabrication of Dual-layer Hollow Fiber Ceramic Composite Membranes by Co-extrusion

LIU Jinyun(),ZHANG Yuting,HONG Zhou,LIU Hua,WANG Shengxian,GU Xuehong()   

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
  • Received:2020-04-07 Revised:2020-06-12 Online:2020-12-20 Published:2020-07-10
  • About author:LIU Jinyun(1994–), female, Master candidate. E-mail: 1158381254@qq.com
  • Supported by:
    National Natural Science Foundation of China(21776128);“333 Talent project” of Jiangsu Province;Natural Science Foundation of Jiangsu Province(BK20170132)

摘要:

中空纤维陶瓷膜具有装填密度高, 传质阻力低, 使用寿命长等优点, 被广泛用于膜分离领域。高度非对称结构的中空纤维膜有利于同时实现高通量与高截留率, 本研究采用共挤出法制备双层中空纤维陶瓷复合膜, 内外层纺丝液分别掺杂平均粒径为1 μm和300 nm的α-Al2O3粉体。系统考察了内层纺丝液TiO2掺杂量、外层纺丝液Al2O3/聚醚砜(PESf)质量比和煅烧温度对膜的结构与性能的影响。结果表明, 在内层纺丝液TiO2掺杂量为2wt%, 外层纺丝液Al2O3/PESf质量比为5.60, 烧结温度为1350 ℃的最优条件下, 中空纤维膜断裂负荷为24 N、平均孔径为0.15 μm、去油率为97.5%。

关键词: 双层中空纤维, 共挤出法, TiO2, Al2O3/PESf

Abstract:

Hollow fiber ceramic membranes have been widely accepted in membrane separation due to their advantages of high packing density, low transfer resistance and long-period operation. Fabrication of highly-asymmetric hollow fiber membrane is helpful to achieve high flux as well as high rejection simultaneously. In this work, dual-layer hollow fiber ceramic composite membranes were prepared by the co-extrusion method. The inner and outer suspensions were doped with α-Al2O3 powders with average particle sizes of 1 μm and 300 nm respectively. Effects of TiO2 content in inner suspension, Al2O3/polyether sulfone (PESf) mass ratio of outer suspension and calcination temperature on structure and properties of membrane were investigated extensively. When the TiO2 content was 2wt% in inner suspension, the Al2O3/PESf mass ratio was 5.60 in outer suspension and the sintering temperature was 1350 ℃, the hollow fiber membrane got the optimum performance, with fracture load of 24 N, average pore size of 0.15 μm, and oil rejection of 97.5%.

Key words: dual-layer hollow fiber, co-extrusion, TiO2, Al2O3/PESf

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