纺织学报 ›› 2022, Vol. 43 ›› Issue (06): 15-21.doi: 10.13475/j.fzxb.20220101407

• 高性能纺织结构柔性材料制备及应用 • 上一篇    下一篇

分离膜湿法非织造支撑体的结构设计与应用

石磊, 张琳炜, 刘亚, 夏磊, 庄旭品()   

  1. 天津工业大学 纺织科学与工程学院, 天津 300387
  • 收稿日期:2022-01-10 修回日期:2022-03-07 出版日期:2022-06-15 发布日期:2022-07-15
  • 通讯作者: 庄旭品
  • 作者简介:石磊(1985—),女,博士,讲师。主要研究方向为功能非织造材料。
  • 基金资助:
    国家重点研发计划项目(2016YFB0303300)

Structural design and application of wet-laid nonwovens for separating membrane support

SHI Lei, ZHANG Linwei, LIU Ya, XIA Lei, ZHUANG Xupin()   

  1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
  • Received:2022-01-10 Revised:2022-03-07 Published:2022-06-15 Online:2022-07-15
  • Contact: ZHUANG Xupin

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摘要：

支撑体是分离膜的生成场所和力学支撑,对膜的结构和性能具有重要的影响。为得到结构性能优异的支撑体结构,利用湿法成网和热压固网技术,制备了含致密平滑层和力学支撑层的非对称结构湿法非织造材料,系统研究了纤维的组成对支撑体结构和性能的影响。结果表明:超细聚酯纤维的引入提高了支撑体的表面平滑度,减小了孔径,提高了分离膜的加工性同时提高了支撑体的孔隙率和结构参数;通过影响分离膜相分离成形过程,实现了对聚砜膜多孔结构的调控,使指状孔逐渐缩短变小,发展成圆形海绵状空腔结构。所制备的聚砜膜的水通量和蛋白截留率得到了一定程度的提高,为分离膜支撑体的研究提供了新的思路。

关键词: 分离膜, 支撑体, 湿法非织造材料, 非对称结构, 超细纤维

Abstract:

Fabric supports play an important role of the membrane forming, and have an significant influence on the structure and performance of the membrane. In order to obtain a support with the required structure, asymmetric structured wet-laid nonwoven fabrics containing dense and smooth layer and high-mechanical layer was prepared by using wet-laid process and hot-pressing technology for the systematic investigation on the influence of fiber composition on the structure and properties. The results show that the addition of ultra-fine fibers improves surface smoothness, reduces pore size, and improves the processability of the separation membrane. When the porosity and structural parameters of the support were increased, and the porous structure of polysulfone membranes was accordingly regulated by influencing the phase separation forming process of the separation membrane, with the finger-like pores gradually shorten to circular sponge-like cavity structure. The permeance and bovine serum albumi rejection of the polysulfone membranes were also improved, indicating a new research idea for the separation membrane supports.

Key words: separating membrane, support, wet-laid nonwoven fabric, asymmetric structure, ultra-fine fiber

中图分类号: 

  • TS174.8

图1

非对称支撑体设计思路"

图2

PET海岛纤维表面和截面形貌及碱减量后的超细PET纤维扫描电镜照片"

图3

非对称支撑体表面及横截面扫描电镜照片"

图4

非对称支撑体的结构和性能"

图5

聚砜超滤膜的扫描电镜照片及结构图"

图6

由不同支撑体制备的聚砜超滤膜的横截面的扫描电镜照片"

图7

由不同支撑体制备的聚砜超滤膜断裂强力和伸长率对比及水通量和蛋白截留率对比"

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