Microstructures and performances of pegylated polysulfone membranes from an in situ synthesized solution via vapor induced phase separation approach
| Autor: | Hai Ming Song, Li Jing Zhu, Xiao Ping Guo, Qun Ji Xue, Zhixiang Zeng, Cun Ting Zhao, Gang Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science 02 engineering and technology Polymer Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology Methacrylate 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Contact angle chemistry.chemical_compound Colloid and Surface Chemistry Membrane chemistry Chemical engineering Polymerization Polysulfone 0210 nano-technology Ethylene glycol |
| Zdroj: | Journal of colloid and interface science. 515 |
| ISSN: | 1095-7103 |
| Popis: | In situ pegylated (PEGylated) microporous membranes have been extensively reported using poly(ethylene glycol) (PEG)-based polymers as blending additives. Alternatively, free standing PEGylated polysulfone (PSf) membranes with excellent hydrophilicity and antifouling ability were directly fabricated from polysulfone/poly(ethylene glycol) methyl ether methacrylate (PSf/PEGMA) solutions after in situ cross-linking polymerization without any treatment via vapor induced phase separation (VIPS) process for the first time. The microstructures and performances of the resulting membranes shifted regularly by adjusting exposure time of the liquid film in humid air. With increasing exposure time, plenty of worm-like networks formed and distributed on membrane surfaces, meanwhile cross-sectional morphology changed from asymmetric finger-like microporous structure to symmetric cellular-like structure, resulting in better mechanical stability. As the exposure time raised from 0 to 5 min, the surface coverage of carboxyl groups increased from ∼1.1 to 4.0 mol%, leading to the decrease in water contact angle from ∼63 to 27° and the increase in water flux from ∼110 to 512 L m−2 h−1. In addition, at prolonged exposure time, increasing hydrophilic PEG chains migrated to membrane surfaced and repelled the adsorption and deposition of protein, resulting in better antifouling ability. The findings of this study offer a facile and high efficient strategy for flexible design and fabrication of the in situ PEGylated membranes with desirable structures and performances in large scale. |
| Databáze: | OpenAIRE |
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