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R Soc Open Sci：反应溶剂对溶胶-凝胶过程中羟基磷灰石合成的影响

2018-01-21 MedSci MedSci原创

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本研究报道了在不同溶剂体系中通过溶胶-凝胶法合成羟基磷灰石（HA）。四水硝酸钙（CNTH）和磷酸氢二铵（DAHP）分别用作钙和磷前体。通过改变溶剂介质进行三种不同的合成反应，同时保持其他所有参数恒定。在所有反应中使用0.5M DAHP水溶液，而CNTH溶解于蒸馏水，四氢呋喃（THF）和N,N-二甲基甲酰胺（DMF）的浓度为0.5 M。使用氨溶液（28-30％）来维持反应混合物的pH值在10-12范

本研究报道了在不同溶剂体系中通过溶胶-凝胶法合成羟基磷灰石（HA）。四水硝酸钙（CNTH）和磷酸氢二铵（DAHP）分别用作钙和磷前体。通过改变溶剂介质进行三种不同的合成反应，同时保持其他所有参数恒定。

在所有反应中使用0.5M DAHP水溶液，而CNTH溶解于蒸馏水，四氢呋喃（THF）和N,N-二甲基甲酰胺（DMF）的浓度为0.5 M。使用氨溶液（28-30％）来维持反应混合物的pH值在10-12范围内。所有反应都在40±2℃下进行4小时。反应完成后，将产物过滤洗涤并在500℃下煅烧2小时。

结果显示，溶剂混合物的介电常数和极性可明显影响合成的磷酸钙的化学结构和形态特性。介电常数最高的水基反应介质主要生成少量HA的β-焦磷酸钙（β-CPF）。DMF/水系统产生HA作为主要相，β-CPF的量非常少。具有最低介电常数的THF/水溶剂系统形成纯HA。

原始出处：

Muhammad Anwaar Nazeer, Emel Yilgor, et al., Effect of reaction solvent on hydroxyapatite synthesis in sol–gel process. R Soc Open Sci. 2017 Dec; 4(12): 171098.  doi:  10.1098/rsos.171098



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    2018-12-17 feather89

    #PE#

    0

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    2018-01-23 lishizhe

    #凝胶#

    0

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    2018-01-23 爆笑小医

    #羟基磷灰石#

    0

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    2018-01-22 Jackie Li

    学习

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