Effect of temperature on crystallinity of carbonate apatite foam prepared from α-tricalcium phosphate by hydrothermal treatment
Effect of temperature on crystallinity of carbonate apatite foam prepared from α-tricalcium phosphate by hydrothermal treatment
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DOI：
10.3233/bme-2009-0581
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发表时间：
2009-01-01
影响因子：
1
通讯作者：
Ishikawa, Kunio
中科院分区：
文献类型：
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作者：
Takeuchi, Akari;Munar, Melvin L.;Ishikawa, Kunio
以α-磷酸三钙（alpha-TCP）泡沫为原料，采用水热法制备了碳酸磷灰石（CAp）泡沫，研究了温度对泡沫结晶度的影响。以聚氨酯泡沫为模板，采用传统的烧结方法制备了α-TCP泡沫。然后，用Na（2）CO（3）水溶液在100 ℃、150 ℃和200 ℃下对所得的α-TCP泡沫体进行水热处理72小时。水热处理后，α-TCP泡沫的松质骨样大孔结构得以保持。然而，泡沫的框架的微观形态显着改变后，72小时的处理期。α-TCP泡沫的光滑表面消失，整个表面被板状沉积物覆盖。在150 ℃和200 ℃下处理的板状沉积物具有光滑的表面，而在100 ℃下处理的板状沉积物由直径约200 nm的球形颗粒构成。X射线衍射和傅里叶变换红外分析的结果表明，α-TCP完全转化为CAp，并且在100 ℃下制备的CAp的结晶度显著低于在150 ℃和200 ℃下制备的那些。在100摄氏度下对α-TCP泡沫进行水热处理允许形成低结晶CAp泡沫，但完全转化需要更长的处理时间。
The effect of temperature on crystallinity of carbonate apatite (CAp) foam prepared from alpha-tricalcium phosphate (alpha-TCP) foam by hydrothermal treatment was investigated in the present study. The alpha-TCP foams were prepared through a conventional sintering method using polyurethane foam as template. Then, the resultant alpha-TCP foams were hydrothermally treated with Na(2)CO(3) aqueous solution at 100 degrees C, 150 degrees C and 200 degrees C for 72 h. After hydrothermal treatment, the cancellous bone-like macroporous structure of the alpha-TCP foams was maintained. However, microscopic morphology of the foams' frame significantly changed after the 72 h treatment period. The smooth surface of alpha-TCP foam disappeared and the whole surface was covered with plate-like deposits. The plate-like deposits treated at 150 degrees C and 200 degrees C had smooth surface while those treated at 100 degrees C were constructed from spherical particles of approximately 200 nm in diameter. The results of X-ray diffraction and Fourier transform infrared analysis showed that alpha-TCP was completely converted to CAp and the crystallinity of CAp prepared at 100 degrees C was significantly lower than those prepared at 150 degrees C and 200 degrees C. Hydrothermal treatment of alpha-TCP foam at 100 degrees C allowed the formation of low-crystalline CAp foam but complete conversion needs a longer treatment period.