Hydrothermal Conversion of Calcite Foam to Carbonate Apatite
Hydrothermal Conversion of Calcite Foam to Carbonate Apatite
复制标题
方解石泡沫水热转化为碳酸盐磷灰石
DOI：
10.1002/9781118807811.ch5
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
K. Ishikawa
中科院分区：
文献类型：
--
作者：
N. Tram;Michito Maruta;K. Tsuru;S. Matsuya;K. Ishikawa
我们之前报道了一种反向陶瓷泡沫方法，旨在提高具有互连多孔结构的方解石泡沫的机械强度。采用多层聚氨酯涂层制备改性泡沫。在之前的研究中，将氢氧化钙（Ca (OH) 2）浆料倒入泡沫中。干燥后，在O2-CO2混合气氛下，将泡沫燃烧以去除聚氨酯并碳酸化Ca (OH) 2。Ca (OH) 2完全转化为方解石。这些方解石泡沫是制备三维（3D）互连多孔碳酸盐磷灰石（CO3AP）泡沫的有用前驱体。因此，我们研究了在磷酸盐溶液中水热处理方解石泡沫到C03Ap泡沫。结果表明，转化率取决于方解石前驱体的孔隙度，方解石泡沫在100℃下保温14 d后完全转化为CO3AP泡沫。与常规泡沫相比，CO3AP泡沫的抗压强度有所提高。综上所述，本研究制备的CO3AP泡沫可以作为临床应用的骨替代材料。
We have previously reported an inverse ceramic foam method aiming to improve mechanical strength of calcite foam that has interconnected porous structure. The modified foam was obtained by multiple polyurethane coating. In previous study, calcium hydroxide (Ca (OH) 2) slurry was poured into the foam. After drying, the foam was burnt out to remove polyurethane and to carbonate Ca (OH) 2 under mixed O2-CO2 atmosphere. Ca (OH) 2 was completely converted to calcite. Those calcite foams are the useful precursors for the preparation of the three-dimensional (3D) interconnected porous carbonate apatite (CO3AP) foam. Therefore, we investigated the hydrothermal treatment of calcite foam to C03Ap foam in phosphate solution. The results indicated that the conversion ratio depends on the degree of porosity of calcite precursor and calcite foam was completely transformed to CO3AP foam at 100 C for 14 days. The CO3AP foam showed the increase in the compressive strength compared to conventional foam. So, it is concluded that CO3AP foam fabricated in this study could be a good candidate for the bone replacement material in clinical application.