纺织学报 ›› 2022, Vol. 43 ›› Issue (05): 63-69.doi: 10.13475/j.fzxb.20210701908

• 纤维材料 • 上一篇    下一篇

纳米纤维膜润湿性对三明治结构复合过滤材料气液过滤性能的影响

陈锋1,2(), 姬忠礼1,2, 于文瀚1,2, 董伍强1,2, 王倩琳3, 王德国1,2   

  1. 1.中国石油大学(北京) 过程流体过滤与分离技术北京市重点实验室, 北京 102249
    2.中国石油大学(北京)机械与储运工程学院, 北京 102249
    3.北京化工大学 机电工程学院, 北京 100029
  • 收稿日期:2021-07-06 修回日期:2022-01-15 出版日期:2022-05-15 发布日期:2022-05-30
  • 作者简介:陈锋(1991—),男,讲师,博士。主要研究方向为聚结过滤用纤维材料。E-mail: chenfeng@cup.edu.cn。
  • 基金资助:
    国家自然科学基金项目(22008259);中国博士后科学基金资助项目(2019M660930);中央高校基本科研业务费专项资金资助项目(2462022YJRC001);中央高校基本科研业务费专项资金资助项目(2462020YXZZ043)

Influence of nanofiber membrane wettability on gas-liquid filtration performance of sandwiched composite filters

CHEN Feng1,2(), JI Zhongli1,2, YU Wenhan1,2, DONG Wuqiang1,2, WANG Qianlin3, WANG Deguo1,2   

  1. 1. Beijing Key Laboratory of Process Fluid Filtration and Separation Technology, China University of Petroleum, Beijing 102249, China
    2. College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China
    3. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2021-07-06 Revised:2022-01-15 Published:2022-05-15 Online:2022-05-30

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摘要：

为提高纳米纤维膜的气液过滤性能,通过静电纺丝技术制备不同组分纳米纤维膜,与不同润湿性玻璃纤维基材组成三明治结构复合过滤材料,分析了纳米纤维膜润湿性对复合过滤材料气液过滤性能的影响以及玻璃纤维基材与纳米纤维膜间润湿性的作用关系。结果表明:亲油玻璃纤维基材与纳米纤维膜制备的复合过滤材料对亚微米液滴的过滤效率较原玻璃纤维基材升高11.9%,品质因子随纳米纤维膜润湿性增大而增大;疏油玻璃纤维基材与纳米纤维膜制备的复合过滤材料的稳态压降大幅上升,过滤效率增加明显,但对亚微米和微米级液滴的品质因子均降低,较原玻璃纤维基材分别下降57%和63%;复合过滤材料的过滤性能受基材润湿性影响,仅当背风基材侧亲油时添加纳米纤维膜可提高综合过滤性能。

关键词: 静电纺丝, 纳米纤维膜, 玻璃纤维基材, 润湿性, 复合过滤材料, 气液过滤性能

Abstract:

In order to improve the gas-liquid filtration performance of nanofibers membrane, nanofibers membrane with different material components were prepared by electrospinning, and sandwiched composite filters were created when combining such nanofibers membrane with glass fiber substrates with different degrees of wettability. The influence of the nanofiber membrane wettability on the gas-liquid filtration performance of composite filter was analyzed, and the relationship between the wettability of glass fiber substrates and nanofibers membrane was studied. The results show that after the nanofibers membrane are added to the oleophilic substrate, the filtration efficiency for submicron droplets increases by 11.9% when compared to the original glass fiber substrates, and the quality factor increases with the increase of nanofiber membrane wettability. The steady-state pressure drop increases significantly after adding nanofibers membrane to the oleophobic glass fiber substrate, but the quality factors for submicron and micron droplets both decrease even when the filtration efficiency also increases greatly, with the highest decrease of 57% and 63% respectively when compared to the original glass fiber substrates. The filtration performance of the composite filter material is controlled by the substrate wettability. The comprehensive filtration performance is improved only when the substrate filter located on the leeward side is oleophilic.

Key words: electrospinning, nanofiber membrane, glass fiber substrate, wettability, composite filter, gas-liquid filtration performance

中图分类号: 

  • TE832

表1

玻璃纤维基材物性参数表"

基材类型 厚度/mm 平均直径/
μm		 平均孔
径/μm		 泡点孔
径/μm
亲油基材 0.46 3.07 7.76 26.11
疏油基材 0.56 3.09 7.76 25.35

图1

静电纺丝系统示意图"

图2

过滤材料气液过滤性能实验系统"

图3

不同聚合物组分的纳米纤维膜SEM照片(×10 000)"

图4

不同过滤材料表面的液滴接触角"

图5

基于亲油基材的复合过滤材料过程压降曲线"

图6

基于亲油基材的复合过滤材料稳态过滤效率"

图7

基于亲油基材的复合过滤材料稳态品质因子"

图8

基于疏油基材的复合过滤材料过程压降曲线"

图9

基于疏油基材的复合过滤材料稳态过滤效率"

图10

基于疏油基材的复合过滤材料稳态品质因子"

图11

不同过滤材料的过程压降变化曲线"

图12

不同过滤材料的稳态过滤效率"

图13

不同过滤材料的稳态品质因子"

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