期刊
POLYMER
卷 153, 期 -, 页码 24-32出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2018.07.083
关键词
Nanofiltration membrane; Interfacial polymerization; Pentaerythritol; 4-Dimethylaminopyridine; Water permeability
资金
- National Natural Science Foundation of China [51778172]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2016DX11]
In this study, 4-dimethylaminopyridine (DMAP) was firstly used as a catalyst in the interfacial polymerization of pentaerythritol (PE) and trimesoyl chloride (TMC) to enhance membrane performance. A series of nanofiltration membranes were prepared using five different DMAP concentrations of 0%, 10%, 20%, 30% and 40% (mass percentage accounting for PE). The filtration test results demonstrated that the water permeability of the typical PE-4 (40% DMAP addition) was 3.47-fold higher than that of the PE-0 (no DMAP addition) with no significant salt rejection loss, indicating that DMAP could effectively improve the water permeability. Characterization by SEM, AFM, and ATR-FTIR indicated that DMAP facilitated the reaction of PE and TMC, which resulted in polyester forming on the surface of the substrate membrane, rather than blocking the membrane pore. Moreover, the PE-DMAP-TMC TFC membrane displayed excellent dye separation performance and high antifouling ability.
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