期刊
JOURNAL OF MEMBRANE SCIENCE
卷 513, 期 -, 页码 1-11出版社
ELSEVIER
DOI: 10.1016/j.memsci.2016.04.035
关键词
Polyethersulfone (PES); Sulfonated polysulfone (SPSf); Ultrafiltration (UF) membrane; Polymer blend; Compatibility
资金
- Chang-jiang Scholars and Innovative Research Team in the University of Ministry of Education, China [IRT13084]
- SA/CHINA Agreement on Cooperation on Science and Technology [2010DF51090]
- Science and Technology Research Programs of Tianjin, China [15PTSYJC00240]
Polymer blend is the most common method to improve membrane hydrophilicity, in which the compatibility between the polymers is an important factor affecting the structure and properties of blend membranes. Polyethersulfone (PES)-based blend membranes were prepared from PES/polysulfone (PSf)/N, N-dimethylacetamide (DMAc) and PES/sulfonated polysulfone (SPSf)/DMAc casting solutions with water as coagulant via non-solvent-induced phase inversion, respectively. The compatibility of blend systems and membrane formation processes were investigated through thermodynamics and kinetics analyses. Ultrasonic through-transmission measurements were performed to quantify the rate of membrane formation during the phase inversion process. The effect of SPSf on the compatibility and morphologies of PES-based blend membranes was characterized by Schneier theory, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) etc. Results indicated that the PES/PSf blend system was partially compatible, leading to instantaneous demixing and the obtained membrane with finger-like structure, whereas the PES/SPSf blend system was entirely miscible, resulting in delayed demixing and the obtained membrane with sponge-like asymmetrical gradient structure. Simultaneously, the surface segregation behavior of SPSf with hydrophilic sulfonic acid groups during the mutual diffusion process resulted to the enhancement of PES/SPSf membrane hydrophilicity. Consequently, PES/SPSf blend membrane showed excellent water permeability and better antifouling ability. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据