膜科学与技术

位置：首页 >> 期刊内容阅读

铸膜液中水的含量对聚醚砜微滤膜结构和性能的影响

作者：孙茂林，宋宗瑞，何本桥，李建新

单位： 1.天津工业大学材料科学与工程学院省部共建分离膜与膜过程国家重点实验室，天津 300387;2.天津工业大学沧州研究院沧州 061000

关键词： PES微滤膜；蒸汽诱导相分离；水含量；非稳态；孔径分布

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2024,44(3):67-72

摘要：

通过蒸汽诱导相分离（VIPS）耦合非溶剂诱导相分离（NIPS）制备了窄孔径分布聚醚砜（PES）微滤膜。本研究以PES为成膜材料，聚乙二醇为致孔剂，以水作为添加剂制备微滤膜，探究了铸膜液中水的质量分数对VIPS阶段蒸汽暴露时间及微滤膜结构与性能的影响。
结果表明，铸膜液中水的质量分数从0 %增加到3 %，相似孔结构的形成所需的蒸汽暴露时间从90 s降低到30 s。膜的表面由致密皮层转变为大孔结构，孔径从0.087 μm增加到0.193 μm，孔径分布显著变窄，水接触角从83.6°增加到113.2°，拉伸强度从1.86 MPa增加到3.85 MPa，断裂伸长率从7 %增加到16 %，膜的力学性能显著增强，同时膜的纯水渗透率从5 840 L/(m2·h·MPa)增加到42 300 L/(m2·h·MPa)。这表明，少量水的添加显著缩短了VIPS蒸汽暴露时间，同时改善了微滤膜的结构和性能。

Narrow pore size distribution polyethersulfone (PES) microfiltration (MF) membranes were prepared through vapor-induced phase separation (VIPS) coupled with non-solvent-induced phase separation (NIPS).In this study, PES was used as the membrane forming material, polyethylene glycol as the pore-causing agent, and water as the additive to prepare microfiltration membranes. The effects of the water content in the casting solution on the vapor exposure time and the structure and properties of microfiltration membranes in VIPS stage were investigated. The results indicate that as the water content in the casting solution increased from 0 % to 3 %, the required exposure time for achieving the same pore structure decreased from 90 s to 30 s. The pore size of the membranes was increased from 0.087 μm to 0.193 μm with a significantly narrower pore size distribution. The water contact angle increased from 83.6o to 113.2o, while the tensile strength and elongation at break improved from 1.86 MPa to 3.85 MPa and from 7 % to 16 %, respectively. Consequently, the pure water permeability increased from 5840 L/(m2·h·MPa) to 42300 L/(m2·h·MPa). These results suggest that the addition of a small amount of water in the casting solution significantly shortened the VIPS exposure time and improved the structure and performance of the MF membrane.

基金项目：

天津市科技重大专项与工程项目（22ZXSYSY00020）；河北省自然科学基金资助项目（B2023110019）

作者简介：

孙茂林（1996-），男，山西吕梁市人，硕士研究生，生物医药微滤膜的制备与应用

参考文献：

[1] 时钧, 袁权, 高从堦,等. 膜技术手册[M]// 北京: 化学工业出版社, 2001: 362
[2] 李江, 郑东晟, 杨昆,等. 微滤-反渗透技术在城市园区污水再生回用中的应用[J]. 膜科学与技术, 2013, 33(4): 120-124.
[3] 樊君, 代宏哲, 高续春,等. 膜分离在中药制药中的应用进展[J]. 膜科学与技术, 2011, 31(3): 180-184.
[4] Fernández García L, Álvarez Blanco S, Riera Rodríguez F A, et al. Microfiltration applied to dairy streams: removal of bacteria[J]. J. Sci. Food Agric, 2013, 93(2): 187-196.
[5] Hahn M W. Broad diversity of viable bacteria in ‘sterile’ (0.2 μm) filtered water[J]. Res. Microbiol, 2004, 155(8): 688-691.
[6] Ismail N, Venault A, Mikkola J P, et al. Investigating the potential of membranes formed by the vapor induced phase separation process[J]. J. Membr. Sci, 2020, 597: 117601.
[7] Peng Y, Fan H, Dong Y, et al. Effects of exposure time on variations in the structure and hydrophobicity of polyvinylidene fluoride membranes prepared via vapor-induced phase separation[J]. Appl. Surf. Sci, 2012, 258(20): 7872–7881.
[8] Chen Y, Liu H, Lin C, et al. Designing poly(vinylidene fluoride) membranes with narrow pore size distribution for microplastics removal from water[J]. J. Appl. Polym. Sci, 2023, 140(34): e54305.
[9] Marino T, Russo F, Figoli A, et al. The Formation of Polyvinylidene Fluoride Membranes with Tailored Properties via Vapour/Non-Solvent Induced Phase Separation[J]. Membranes, 2018, 8(3): 71.
[10] Zhao Q, Xie R, Luo F, et al. Preparation of high strength poly(vinylidene fluoride) porous membranes with cellular structure via vapor-induced phase separation[J]. J. Membr. Sci, 2018, 549: 151-164.
[11] Zhang L, Cui Z, Hu M, et al. Preparation of PES/SPSf blend ultrafiltration membranes with high performance via H2O-induced gelation phase separation[J]. J. Membr. Sci, 2017, 540: 136-145.
[12] Lin K Y, Wang D-M, Lai J Y. Nonsolvent-Induced Gelation and Its Effect on Membrane Morphology[J]. Macromolecules, 2002, 35(17): 6697-6706.
[13] Matsuyama H, Teramoto M, Nakatani R, et al. Membrane formation via phase separation induced by penetration of nonsolvent from vapor phase. II. membrane morphology[J]. J. Appl. Polym. Sci, 1999, 74(1): 171–178.
[14] Lu W, Yuan Z, Zhao Y, et al. Preparation of high strength poly(vinylidene fluoride) porous membranes with cellular structure via vapor-induced phase separation[J]. Chem. Soc. Rev, 2017, 46(8): 2199-2236.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com