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首页> 外文期刊>Journal of Applied Polymer Science >Calcium ion-mediated grafting of a phosphate-containing monomer
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Calcium ion-mediated grafting of a phosphate-containing monomer

机译：钙离子介导的含磷酸盐单体的接枝

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摘要

Grafting of monoacryloxyethyl phosphate onto expanded polytetrafluoroethylene was achieved using simultaneous grafting with the aim of improving the membrane wettability and mineralization capacity. This study explored the effect of adding calcium ions to the grafting solution and observed increased graft yield and wettability when compared with samples grafted in the absence of calcium ions. Fourier transform infrared spectroscopy mapping found the graft copolymer to be distributed in a patchy manner across the surface as well as throughout the membrane. Through X-ray photoelectron spectroscopy analysis, it was found that calcium ions were incorporated into the graft copolymer and could be extracted using a basic ethylenediaminetetraacetic acid solution without reduction in graft yield. This implies that the presence of calcium ions is affecting the graft yield by increasing the local concentration of monomer near the surface during the grafting process. Investigation of the mineralization capacity of the grafted membranes in simulated body fluid revealed that the increased wettability of the membranes rather than the presence of the calcium ions affected the mineralization outcome. (C) 2015 Wiley Periodicals, Inc.
机译：为了提高膜的润湿性和矿化能力，同时进行接枝，将磷酸单丙烯酰氧基乙基酯接枝到发泡的聚四氟乙烯上。这项研究探讨了向接枝溶液中添加钙离子的效果，并观察到与不存在钙离子的情况下进行接枝的样品相比，接枝产率和润湿性得到了提高。傅立叶变换红外光谱图发现，接枝共聚物以斑块状分布在整个表面以及整个膜上。通过X射线光电子能谱分析，发现钙离子被结合到接枝共聚物中，并且可以使用碱性乙二胺四乙酸溶液萃取而不会降低接枝产率。这暗示钙离子的存在通过在接枝过程中增加表面附近单体的局部浓度来影响接枝产率。对模拟体液中接枝膜的矿化能力的研究表明，膜的润湿性增加而不是钙离子的存在会影响矿化的结果。 （C）2015年Wiley Periodicals，Inc.

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