Fabrication of polysulfone membrane with sponge-like structure by using different non-woven fabrics

聚砜 材料科学 化学工程 膜结构 制作 多孔性 聚对苯二甲酸乙二醇酯 相位反转 蒸发 铸造 高分子化学 复合材料 化学 聚合物 物理 热力学 工程类 病理 替代医学 生物化学 医学
作者
Huanhuan Wu,Haoyue Zhao,Yakai Lin,Xin Liu,Hong Yao,Lixin Yu,Haihui Wang,Xiao‐Lin Wang
出处
期刊:Separation and Purification Technology [Elsevier]
卷期号:297: 121553-121553 被引量:31
标识
DOI:10.1016/j.seppur.2022.121553
摘要

The porous support layer with sponge-like structure has been widely used in thin-film composite (TFC) membranes. A series of polysulfone (PSf) support membranes with different sponge-like structure were fabricated via non-solvent induced phase separation (NIPS) method. The influences of membrane fabrication parameters including coagulation bath temperature, relative humidity, pre-evaporation time and membrane thickness on PSf membrane properties were systematically explored. The sponge-like-structured PSf membranes were formed while the coagulation bath temperature, relative humidity, pre-evaporation time and membrane thickness were 60 °C, 20%, 30 s, and 60 μm, respectively. Additionally, three types of polyethylene terephthalate (PET) non-woven fabrics (NWFs) with different properties were selected to study the influencing mechanism on PSf membrane with sponge-like structure. It was found that the PSf membrane (PSf-NWF-01) formed on more hydrophilic PET NWFs exhibited higher porosity (63%) and excellent performances (with a pure water flux of 463.69 L/(m2·h) and the BSA rejection of 97.58%), which was caused by a higher adhesion existed between more hydrophilic NWF surface and PSf casting solution. Moreover, the PSf-NWF-01 membrane also exhibited the highest flux recovery ratio of 88.59% and the lowest irreversible fouling of 11.41%. This work academically clarified the influence mechanism of PET NWFs properties on spongy-like PSf membranes, which also had theoretical guidance for selecting appropriate PET NWFs for the preparation of PSf membranes in industry.
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