Apatite formation on/in hydrogel matrices using an alternate soaking process (III): effect of physico-chemical factors on apatite formation on/in poly(vinyl alcohol) hydrogel matrices.
Apatite formation on/in hydrogel matrices using an alternate soaking process (III): effect of physico-chemical factors on apatite formation on/in poly(vinyl alcohol) hydrogel matrices.
复制标题
使用交替浸泡过程在水凝胶基质上/内形成磷灰石（III）：物理化学因素对聚（乙烯醇）水凝胶基质上/内磷灰石形成的影响。
DOI：
10.1163/156856299x00883
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Akashi
中科院分区：
文献类型：
--
作者：
T. Taguchi;A. Kishida;M. Akashi
本研究的目的是澄清的物理化学因素，影响磷灰石形成的水凝胶在一个新的交替浸泡过程中。聚（乙烯醇）（PVA）凝胶被用作模型基质。在相同的反应周期中，PVA凝胶上/中形成的磷灰石的量随着反应温度的升高而降低。这表明平衡溶胀比随反应温度的升高而降低，即在高反应温度下，钙离子和磷酸根离子的扩散减少。然而，在PVA凝胶上/中形成的磷灰石的结晶度在较高的反应温度下更大。在PVA凝胶上/中形成的磷灰石的量随着钙和磷酸盐溶液浓度的增加而增加，并且在前三个反应循环中通过摇动而增加。当溶液体积改变时，可以观察到一些影响，但是在本研究中，浸泡顺序不是有效的。这些结果表明，可以通过改变反应温度和Ca-和P-溶液浓度来控制PVA凝胶上/中磷灰石的形成量，并且还可以通过控制反应温度来改变磷灰石的结晶度。
The aim of this study is to clarify the physico-chemical factors which influence apatite formation on/in a hydrogel during a novel alternate soaking process. A poly(vinyl alcohol) (PVA) gel was used as a model matrix. The amount of apatite formed on/in PVA gels decreased with an increase in the reaction temperature during the same reaction cycles. This suggested that the equilibrium swelling ratios decreased with increasing reaction temperatures; that is, the diffusion of calcium and phosphate ions reduced at high reaction temperature. However, the crystallinity of apatite formed on/in PVA gels was greater at higher reaction temperatures. The amount of apatite formed on/in PVA gels increased with an increase in the calcium and phosphate solution concentrations, and increased by shaking at the first three reaction cycles. A few influences could be observed when the solution volume was changed, however, the soaking order was not effective in this study. These results indicate that the amount of apatite formation on/in PVA gels can be controlled by changing the reaction temperature and the Ca- and P-solution concentrations, and that the crystallinity of apatite can be also changed by controlling the reaction temperatures.