膜
氯乙烯
超滤(肾)
聚氯乙烯
高分子化学
化学工程
材料科学
乙二醇
原子转移自由基聚合
共聚物
生物污染
甲基丙烯酸酯
傅里叶变换红外光谱
化学
色谱法
复合材料
聚合物
工程类
生物化学
作者
Haibo Wu,Tong Li,Baicang Liu,Chen Chen,Shuai Wang,John C. Crittenden
标识
DOI:10.1016/j.apsusc.2018.06.056
摘要
To improve the performance of poly(vinyl chloride) (PVC) membranes, we synthesized the amphiphilic copolymer PVC-graft-poly(ethylene glycol) methyl ether methacrylate (PVC-g-PEGMA) via atom transfer radical polymerization (ATRP). We then fabricated PVC/PVC-g-PEGMA blended ultrafiltration membranes for the first time. The effect of the amount of PVC-g-PEGMA from 5 to 20 wt.% on the PVC membrane properties was systematically investigated. The successful synthesis of PVC-g-PEGMA was confirmed by the results of nuclear magnetic resonance (1H NMR), and Fourier transform infrared spectroscopy (FTIR). With the increase in the amount of the PVC-g-PEGMA additive from 0 to 20 wt.%, we found that (1) the surface oxygen content of the membrane increased from 3.20% to 9.31%; (2) the membrane surface pore size and pore density decreased; (3) the hydrophilicity and pure water flux of the membrane improved, but they plateaued, even slightly decreasing after the addition of 15 wt.% PVC-g-PEGMA; (4) the sodium alginate (SA) rejection ratios of all PVC/PVC-g-PEGMA blended membranes were higher than 90%; and (5) all blended PVC membranes exhibited higher flux recovery ratios (FRRs) than the pure PVC membrane; in particular, the FRR increased by 89% when 10 wt.% PVC-g-PEGMA was added. These results indicated the enhanced antifouling properties of PVC/PVC-g-PEGMA blended ultrafiltration membranes.
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