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首页> 外文期刊>Journal of Applied Polymer Science >Synergistic effect of silica nanoparticles in the matrix of a poly(ethylene glycol) diacrylate coating layer for the surface modification of polyamide nanofiltration membranes
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Synergistic effect of silica nanoparticles in the matrix of a poly(ethylene glycol) diacrylate coating layer for the surface modification of polyamide nanofiltration membranes

机译：聚乙二醇二丙烯酸酯涂层基质中二氧化硅纳米粒子对聚酰胺纳米过滤膜表面改性的协同作用

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摘要

In this study, a commercial polyamide nanofiltration membrane was modified by a combination of poly(ethylene glycol) diacrylate (PEGDA) in situ polymerization and silica (SiO2) nanoparticles. The PEGDA layer was polymerized on the surface of the membranes alone or mixed with SiO2 nanoparticle. The surface modification influence on the water flux, salt rejection, and antifouling behavior was investigated. The effects of the nanoparticles and PEGDAylation on the membrane properties were characterized by Fourier transform infrared spectroscopy, contact angle measurement, and scanning electron microscopy analyses. The membranes that were in contact with 30 wt % PEGDA and then treated with ultraviolet light for 5 min had a better water flux than the unmodified membrane. The fouling resistance of the membranes to a foulant solution containing bovine serum albumin, humic acid, and sodium sulfate were studied, and the results show that the membrane with 30 wt % PEGDA had better antifouling properties. After the weight percentage of PEGDA for the prepolymerization solution was optimized (30 wt % was the best), the SiO2 nanoparticle concentration in the prepolymerization matrix was optimized. The presence of SiO2 nanoparticles in the PEGDA layer increased the membrane flux. The maximum water flux and good antifouling properties were obtained for 0.5 wt % SiO2 nanoparticles in a 30 wt % PEGDA layer. (C) 2016 Wiley Periodicals, Inc.
机译：在这项研究中，通过将聚乙二醇二丙烯酸酯（PEGDA）原位聚合和二氧化硅（SiO2）纳米粒子相结合，对商用聚酰胺纳米过滤膜进行了改性。 PEGDA层仅在膜表面上聚合或与SiO 2纳米颗粒混合。研究了表面改性对水通量，脱盐率和防污性能的影响。通过傅里叶变换红外光谱，接触角测量和扫描电子显微镜分析表征了纳米颗粒和PEGDA化对膜性能的影响。与30 wt％PEGDA接触，然后用紫外线处理5分钟的膜比未改性的膜具有更好的水通量。研究了膜对含有牛血清白蛋白，腐殖酸和硫酸钠的污垢溶液的抗污性，结果表明，含有30 wt％PEGDA的膜具有更好的防污性能。优化用于预聚合溶液的PEGDA的重量百分比（最佳为30 wt％）后，优化预聚合基质中的SiO2纳米颗粒浓度。 PEGDA层中SiO2纳米颗粒的存在增加了膜通量。对于30重量％的PEGDA层中的0.5重量％的SiO 2纳米颗粒，获得了最大的水通量和良好的防污性能。 （C）2016威利期刊公司

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