Preparation and characterization of porous hydroxyapatite through polymeric sponge method
Preparation and characterization of porous hydroxyapatite through polymeric sponge method
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DOI：
10.1016/j.ceramint.2009.05.012
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发表时间：
2009-12
影响因子：
5.2
通讯作者：
I. Sopyan;J. Kaur
中科院分区：
文献类型：
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作者：
I. Sopyan;J. Kaur
以商品羟基磷灰石（HA）粉末为原料，采用聚合物海绵法制备了多孔羟基磷灰石样品.研究了烧结速度、搅拌时间和HA浓度对多孔体的孔隙率、抗压强度和结晶度的影响。研究发现，较快的烧结速率导致较高的表观密度、较高的抗压强度和较好的结晶度。更长的搅拌时间也产生相同的结果。42重量% HA浓度被认为是实现更高的抗压强度和结晶度，以及更低的孔隙率的最佳浓度。当孔隙率梯度为34.3- 59.8%时，多孔体的抗压强度为1.8 - 10.5MPa。结果表明，孔隙率对抗压强度有很大的影响。从力学上讲，本研究中开发的HA多孔体可作为骨植入物，因为其平均抗压强度完全在松质骨的范围内。
Porous hydroxyapatite samples were prepared via polymeric sponge method using commercial hydroxyapatite (HA) powder. The effects of sintering rate, stirring time and HA concentration on porosity, compressive strength and crystallinity of the porous bodies were evaluated. The study found that a faster sintering rate resulted in higher apparent density, higher compressive strength and better crystallinity. A longer stirring time also yielded the same results. 42wt.% HA concentration was found to be the optimal concentration to achieve higher compressive strength and crystallinity, and lower porosity. The compressive strength of the porous bodies varied from 1.8 to 10.5MPa for a porosity gradient of 34.3–59.8%. The results showed that the compressive strength is strongly dependent on porosity. Mechanically, the HA porous bodies developed in the study can be accepted as bone implants as the average compressive strengths are well within that of cancellous bone.