Production of hydroxyapatite/carbon nanotube composites with high strength and flexibility

将羟基磷灰石（HA）生长在单个多壁碳纳米管（MWCNT）的表面上，利用放电等离子体烧结系统（SPS）在1473 K、80 MPa的真空压力下烧结90 min，制备HA/MWCNT复合材料。HA部分生长在酰胺功能化的MWCNT表面，HA/MWCNT复合材料的三次弯曲强度和杨氏模量分别为120 MPa和15 GPa。由于所得到的复合材料的杨氏模量低于独立的HA压块，MWCNT被发现给复合材料的灵活性和增强填料的工作。

The hydroxyapatite (HA) was grown on the surface of an individual multi-walled carbon nanotube (MWCNT), and their MWCNTs decorated with HA were sintered at 1473 K under a pressure of 80 MPa in vacuum for 90 min using a spark plasma sintering system (SPS) to produce HA/MWCNT composites. HA was partially grown on the surface of amide-functionalized MWCNTs, and the three bending strength and young’s modulus of the HA/MWCNT composites were 120 MPa and 15 GPa, respectively. As the young's modulus of the resulting composites was lower than that of the free-standing HA compacts, MWCNT were found to give the composites flexibility and to work as reinforced filler.