Effect of pyrophosphate ions on the conversion of calcium-lithium-borate glass to hydroxyapatite in aqueous phosphate solution.
Effect of pyrophosphate ions on the conversion of calcium-lithium-borate glass to hydroxyapatite in aqueous phosphate solution.
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DOI：
10.1007/s10856-010-4130-5
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发表时间：
2010-10
影响因子：
3.7
通讯作者：
Huang, Wenhai
中科院分区：
文献类型：
--
作者：
Fu, Hailuo;Rahaman, Mohamed N.;Day, Delbert E.;Huang, Wenhai
玻璃在磷酸盐水溶液中转化为羟基磷灰石（HA）材料被用作玻璃的生物活性潜力的指示，以及用于制备生物有用材料的低温途径。在这项工作中，不同浓度的焦磷酸盐离子的磷酸盐溶液中的钙锂硼酸盐玻璃HA的转化的效果进行了研究。将玻璃颗粒（150-355 µm）在含有0-0.1 M K4 P2 O 7的0.25 M K2 HPO 4溶液中浸泡长达28天。通过测量颗粒的重量损失和溶液的离子浓度来监测玻璃颗粒的降解动力学及其向HA的转化。利用X射线衍射、扫描电子显微镜和傅里叶变换红外光谱分析了转化产物的结构和组成。对于浓度高达0.01 M的K4 P2 O 7，玻璃颗粒转化为HA，但完全转化的时间从2天（无K4 P2 O 7）增加到10天（0.01 M K4 P2 O 7）。当K4 P2 O 7浓度增加到0.1M时，产物由无定形磷酸钙材料组成，其最终结晶为焦磷酸盐产物（主要是K2 CaP 2 O 7和Ca 2 P2 O 7）。HA材料和设备的玻璃转化路线的形成的结果的后果进行了讨论。
The conversion of glass to a hydroxyapatite (HA) material in an aqueous phosphate solution is used as an indication of the bioactive potential of the glass, as well as a low temperature route for preparing biologically useful materials. In this work, the effect of varying concentrations of pyrophosphate ions in the phosphate solution on the conversion of a calcium–lithium–borate glass to HA was investigated. Particles of the glass (150–355 µm) were immersed for up to 28 days in 0.25 M K2HPO4 solution containing 0–0.1 M K4P2O7. The kinetics of degradation of the glass particles and their conversion to HA were monitored by measuring the weight loss of the particles and the ionic concentration of the solution. The structure and composition of the conversion products were analyzed using X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. For K4P2O7 concentrations of up to 0.01 M, the glass particles converted to HA, but the time for complete conversion increased from 2 days (no K4P2O7) to 10 days (0.01 M K4P2O7). When the K4P2O7 concentration was increased to 0.1 M, the product consisted of an amorphous calcium phosphate material, which eventually crystallized to a pyrophosphate product (predominantly K2CaP2O7 and Ca2P2O7). The consequences of the results for the formation of HA materials and devices by the glass conversion route are discussed.
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影响因子：
4.5
作者：
Han, Xue;Du, Ming;Day, Delbert E.
通讯作者：
Day, Delbert E.
DOI：
10.1016/0584-8539(84)80127-0
发表时间：
1984-01-01
影响因子：
4.4
作者：
SARR, O;DIOP, L
通讯作者：
DIOP, L
影响因子：
3.9
作者：
Yao, Aihua;Wang, Deping;Day, Delbert E.
通讯作者：
Day, Delbert E.
影响因子：
4.5
作者：
Jones, Julian R.;Gentleman, Eilen;Polak, Julia
通讯作者：
Polak, Julia
影响因子：
56.9
作者：
HENCH, LL;WILSON, J
通讯作者：
WILSON, J