https://scholars.lib.ntu.edu.tw/handle/123456789/635796
標題: | Construction of transfer-free regular through-pore polyimide composite microfiltration membranes via amphiphilic dendron-assisted breath-figure method for water treatment | 作者: | Hu, Chien Chieh Fang, Jia Ci RU-JONG JENG Wu, Chien Hsin Huang, Ying Chi Sun, Yi Ming Lee, Kueir Rarn Lai, Juin Yih |
關鍵字: | Amphiphilic dendron | Breath-figures method | Microfiltration | Polyimide membrane with regular through-pore | 公開日期: | 15-十二月-2023 | 卷: | 327 | 來源出版物: | Separation and Purification Technology | 摘要: | Regular through-pore membranes exhibit extremely high productivity and size-selective capabilities. Previous studies have demonstrated that the use of a polymer alone on a solid substrate surface hinders the formation of regular through-pore membranes. In this study, amphiphilic dendrons were used as surfactants to concentrate the functional groups and strengthen the weak bonding forces between the molecules, which is conducive to the formation of regular through-pores in the membrane. The amphiphilic dendrons were mixed with commercial-grade polyimide (PI) using chloroform as the solvent, and the solution was evenly coated on the surface of the filter paper. Using the breath-figure method, an ultrathin regular through-pore PI layer was formed directly on the surface of the filter paper. The SEM image shows that regular through-pores were formed only on the surface of the substrate. The preparation process used in this study eliminates the need to transfer ultrathin and weak membranes to the substrate surface, which simplifies the membrane-making process. Pure water and yeast solution filtration tests were conducted on the composite membrane prepared with a 5 mg/ml dendron solution. A pure water permeance of 118,826 L m-2h−1 bar−1 (LMH/bar) was obtained, the yeast solution permeance and rejection are 17,410 LMH/bar and 92.85 %, respectively. The yellow, turbid, muddy water was successfully purified to clean water. The original performance of the fouled membrane was restored after only 30 s of water flushing. This study proposes a new approach to fabricate high-efficiency regular through-pore PI composite microfiltration membranes. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/635796 | ISSN: | 13835866 | DOI: | 10.1016/j.seppur.2023.124981 |
顯示於: | 高分子科學與工程學研究所 |
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