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首页> 外文期刊>Journal of the Society of Inorganic Materials,Japan: セツコウ·石灰·セメント·地球環境の科学 >Preparation of porous calcium phosphate cement for bone repair materials from amorphous calcium phosphate
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Preparation of porous calcium phosphate cement for bone repair materials from amorphous calcium phosphate

机译：用无定形磷酸钙制备骨修复材料用多孔磷酸钙水泥

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摘要

The bone repair material strongly required porouscalcium phosphate cement with pore diameters of above 100#mu#m for the introduction of osteoblast in vivo. The presentwork dealt with the preparation conditions of porous calciumphosphate cement by adding calcium carbonate (CaCO_3) as afoaming agent to the mixtures of amorphous tricalcium phosphate(ATCP)-hydroxyapatite (HAp) –citric acid-chitosan. The porouscement was prepared under the following conditions: theliquid/solid weight ratio, 1.0~1.6; HAp wisker/ ATCP weight ratio,0.4; CaCO_3/ATCP molar ratio, 0.34; citric acid solution, 2.0mol dm~-3; and the amount of chitosan, 4.0 masspercent. Theproducts were characterized by X-ray diffractometry, thermalanalysis (TG-DTA), the measurement of pore size distribution andscanning electron microscopy (SEM). The compressive andbending strengths were improved with increasing amount ofchitosan in cement. In addition, the large pores were created byadding CaCO_3. The optimum conditions for the preparation ofporous cement having pore diameters of above 100 #mu#m wereas follows: the liquid/solid weight ratio, 1.5; the amount of chitsan,4.0 masspercent; and CaCO_3/ATCP molar ratio, 0.09. The mainproducts after hydration were octacalcium phosphate (OCP) anddicalcium phosphate di-hydrate (DCPD). The addition of CaCO_3promoted the formation of large pores and crystallization from ATCP.
机译：骨修复材料强烈需要孔径大于100＃μm的多孔磷酸钙水泥，以便在体内引入成骨细胞。本文通过在无定形磷酸三钙（ATCP）-羟基磷灰石（HAp）-柠檬酸-壳聚糖的混合物中加入碳酸钙（CaCO_3）作为消泡剂来处理多孔磷酸钙水泥的制备条件。在以下条件下制备多孔水泥：液/固重量比为1.0〜1.6; HAp wisker / ATCP重量比为0.4; CaCO_3 / ATCP摩尔比为0.34;柠檬酸溶液，2.0mol dm〜-3;壳聚糖的量为4.0质量％。通过X射线衍射，热分析（TG-DTA），孔径分布测量和扫描电子显微镜（SEM）对产物进行表征。随着水泥中壳聚糖含量的增加，抗压强度和抗弯强度得到提高。另外，大孔是通过添加CaCO_3产生的。制备孔径大于100μm＃m的多孔水泥的最佳条件如下：液/固重量比为1.5;液固比为1.5。壳聚糖的量为4.0质量％; CaCO 3 / ATCP摩尔比为0.09。水合后的主要产物是磷酸八钙（OCP）和磷酸二钙二水合物（DCPD）。 CaCO_3的添加促进了大孔的形成和ATCP的结晶。

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