Effect of nanosized reinforcement particles on mechanical properties of high density polyethylene-hydroxyapatite composites
Effect of nanosized reinforcement particles on mechanical properties of high density polyethylene-hydroxyapatite composites
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DOI：
10.1179/174367606x115922
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发表时间：
2006-10-01
影响因子：
2.2
通讯作者：
Khavandi, A. R.
中科院分区：
文献类型：
--
作者：
Shahbazi, R.;Javadpour, J.;Khavandi, A. R.
研究了纳米羟基磷灰石（HA）填料对高密度聚乙烯-羟基磷灰石（HDPE-HA）复合材料力学性能的影响。采用机械研磨法制备了平均粒径为40-50 nm的HA纳米粒子。通过使用单螺杆挤出系统混合陶瓷和高密度聚乙烯颗粒来生产具有不同量的纳米级HA颗粒的复合材料样品。复合材料样品的力学测试结果表明，随着复合材料样品中HA含量的体积分数的增加，断裂强度和杨氏模量值增加。同时，随着陶瓷填料颗粒体积分数的增加，断裂应变和韧性值均下降。此外，在这项研究中获得的结果与市售复合材料样品（HAPEX）的机械性能的比较表明，类似的机械性能可以达到在一个低得多的陶瓷含量，如果纳米级HA颗粒用于制造这些复合生物材料。
The effect of nanoscaled hydroxyapatite (HA) filler particles on the mechanical properties of the high density polyethylene-hydroxyapatite (HDPE-HA) composite samples has been investigated. Nanosized HA particles with an average size in the range of 40-50 nm were synthesised by mechanical milling method. The composite samples with various amounts of nanoscaled HA particles were produced by mixing the ceramic and high density polyethylene particles using a single screw extrusion system. The results of the mechanical testing on the composite samples showed an increase in the fracture strength and the young's modulus values with increasing volume fraction of HA content in the composite samples. At the same time, there were decreases in both the fracture strain and toughness values with increasing volume fraction of the ceramic filler particles. In addition the comparison of the results obtained in this study with the mechanical properties of the commercially available composite samples (HAPEX) shows that similar mechanical properties can be reached at a much lower ceramic content, if nanoscaled HA particles are used in the fabrication of these composite biomaterials.