| Autor: |
Benqiao He, Yu Liu, Jianxin Li, Lei Li, Ronald D. Sanderson, Suobo Zhang |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Journal of Membrane Science. 373:98-106 |
| ISSN: |
0376-7388 |
| DOI: |
10.1016/j.memsci.2011.02.045 |
| Popis: |
A novel reverse osmosis hollow fiber membrane was prepared by interfacial polymerization from 3,3′,5,5′-biphenyl tetraacyl chloride and m-phenylenediamine on a polysulfone hollow fiber membrane. The structural evolution of biphenyl polyamide thin film during interfacial polymerization was monitored by attenuated total reflectance infrared, X-ray photoelectron spectroscopy and atom force microscopy. The relationship between the structure and separation properties of the membranes was investigated. Results show that the biphenyl polyamide thin film had a three-layer structure: a loose initial layer with a low cross-linked structure, a dense middle layer with a high cross-linked structure and a loose surface layer with a low cross-linked structure. The dense middle layer had an intrinsic cross-linked structure with over 86.0% amide bonds (–CONH–) and below 14.0% carboxylic groups (–COOH), mainly responsible for separation. A growth model of the biphenyl polyamide thin film was proposed to describe the structural evolution process during interfacial polymerization. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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