Boosting permeation and separation characteristics of polyethersulfone ultrafiltration membranes by structure modification via dual-PVP pore formers

被引：31

作者：

Ho, Chao-Chuan ^{[1
]}

Su, Jenn Fang ^{[1
,2
]}

机构：

[1] Tamkang Univ, Dept Chem & Mat Engn, New Taipei 25137, Taiwan

[2] Tamkang Univ, Energy & Optoelect Mat Res Ctr, New Taipei 25137, Taiwan

来源：

POLYMER | 2022年 / 241卷

关键词：

Polyethersulfone; Membrane; Non -solvent induced phase separator (NIPS); Ultrafiltration; Polyvinylpyrrolidone; Molecular weight; PHASE INVERSION MEMBRANES; PERFORMANCE; MORPHOLOGY;

D O I：

10.1016/j.polymer.2022.124560

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Asymmetric polyethersulfone (PES) membranes were fabricated from the PES/gamma-butyrolactone (GBL)/poly-vinylpyrrolidone (PVP) system using non-solvent induced phase separation (NIPS) process. Two types of PVP with different molecular weights (PVP-K30 and PVP-K15) were added as dual pore-forming agents in the dope solution to modify the morphological, physical, permeation, and separation properties of the membranes. Our results demonstrate that high concentration of PVP-K30 in the dope favors the formation of a top skin layer and macrovoids, whereas the PVP-K15 can open the pores on the top surface, shrink the macrovoids, and transform the bi-continuous porous structure toward cellular pores. In the optimal composition of PVP additives (i.e. 8 wt% PVP-K30 and 5 wt% PVP-K15 in this work), the resulted PES membrane exhibits a water flux of 563 L m(-2)h(-1) and a remarkable rejection coefficient over 99% for blue dextran solution, showing a promising potential in ultrafiltration applications.

引用

页数：7