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首页> 外文期刊>Journal of Applied Polymer Science >Fouling control through the hydrophilic surface modification of poly(vinylidene fluoride) membranes
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Fouling control through the hydrophilic surface modification of poly(vinylidene fluoride) membranes

机译：通过聚偏二氟乙烯膜的亲水性表面改性来控制结垢

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摘要

A hydrophilic fouling-resistant poly(vinyl alcohol) (PVA) based polymer was synthesized by the etherification of PVA with monochloroacetic acid under alkaline conditions, and the polymer, PVA-OCH2COONa, was subsequently applied to modify a poly(vinylidene fluoride) (PVDF) membrane to both enhance the hydrophilicity and provide fouling resistance. The successful etherification was confirmed by C-13-NMR and attenuated total reflectance-Fourier transform infrared spectroscopy, whereas the synthesized polymer was shown by differential scanning calorimetry analysis to have an improved thermal stability over PVA. The physicochemical properties of the surfaces of the modified PVDF membranes were investigated with various analytical tools, including field emission scanning electron microscopy, atomic force microscopy, and contact angle analysis. Fouling tests with bovine serum albumin showed the PVA-OCH2COONa modified PVDF membrane to have both a higher pure water flux and a retarded decline in flux over the filtration period compared with the PVA-coated PVDF membrane. This study demonstrated that the modification of PVDF membranes with PVA-OCH2COONa could be an efficient method for enhancing their fouling resistance. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41712.
机译：通过在碱性条件下将PVA与一氯乙酸醚化来合成亲水性耐污垢的聚乙烯醇（PVA）基聚合物，然后将该聚合物PVA-OCH2COONa应用于改性聚偏二氟乙烯（PVDF）膜）既可以增强亲水性又可以提供抗污性。通过C-13-NMR和衰减的全反射-傅立叶变换红外光谱法证实成功的醚化，而通过差示扫描量热分析显示合成的聚合物具有比PVA更高的热稳定性。用各种分析工具研究了改性PVDF膜表面的理化性质，包括场发射扫描电子显微镜，原子力显微镜和接触角分析。与PVA涂层的PVDF膜相比，牛血清白蛋白的结垢测试显示，在过滤期间，PVA-OCH2COONa改性的PVDF膜既具有较高的纯净水通量，又具有滞后的通量下降。这项研究表明，用PVA-OCH2COONa改性PVDF膜可能是增强其抗污性的有效方法。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41712。

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