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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Effect of calcium salt content in the poly(implied by-caprolactone)/ silica nanocomposite on the nucleation and growth behavior of apatite layer
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Effect of calcium salt content in the poly(implied by-caprolactone)/ silica nanocomposite on the nucleation and growth behavior of apatite layer

机译:聚己内酯/二氧化硅纳米复合材料中钙盐含量对磷灰石层成核和生长行为的影响

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摘要

The effect of calcium salt content in the poly(implied by-caprolactone) (PCL)/silica nanocomposite on the nucleation and growth behavior of apatite layer in simulated body fluid (SBF) was investigated. The specimens were prepared with low (L) and high (H) concentrations of calcium nitrate tetrahydrate through a sol-gel method. After soaking in the SBF at 36.5 deg C for 1 week, a densely packed apatite layer that had a smooth surface and a Ca/P ratio similar to bone was formed on specimens containing a low concentration of calcium salt while a loosely packed apatite layer with a rugged surface and a higher Ca/P ratio than that of bone occurred on specimens containing a high concentration of calcium salt. The results are explained in terms of the degree of supersaturation of apatite in the SBF, as determined by the concentrations of constituent ions of apatite and pH. The practical implication of the results is that a dense and bone-like apatite layer on the PCL/silica nanocomposite in vitro, and perhaps in vivo, can be achieved by adopting an appropriate calcium salt content.
机译:研究了聚己内酯(PCL)/二氧化硅纳米复合材料中钙盐含量对模拟体液(SBF)中磷灰石层成核和生长行为的影响。通过溶胶-凝胶法用低(L)和高(H)浓度的四水合硝酸钙制备样品。在36.5摄氏度的SBF中浸泡1周后,在含有低浓度钙盐的样品上形成了一个表面光滑且Ca / P比与骨头相似的致密堆积的磷灰石层,而一个松散堆积的磷灰石层则含有少量钙盐。钙盐浓度高的样品表面粗糙,钙/磷比骨头高。结果由SBF中磷灰石的过饱和度来解释,该饱和度由磷灰石组成离子的浓度和pH值确定。结果的实际含义是,通过采用适当的钙盐含量,可以在体外,甚至在体内,在PCL /二氧化硅纳米复合材料上形成致密的骨状磷灰石层。

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