Abstract: Multi-walled carbon nanotubes coated with hydroxyapatite were synthesized by using in-situ method, the influence factors on the hydroxyapatite coating was explored. The results show that multiwalled carbon nanotubes functionalized with anionic groups form an efficient matrix for the growth of hydroxyapatite crystals. It also indicates that not only the pH affect the component of the composites, but also the aging temperature and aging time have a great influence on the particle size and thickness of hydroxyapatite deposited on the surface of the multi-walled carbon nanotubes.

Key words: Multi-walled carbon nanotubes coated with hydroxyapatite were synthesized by using in-situ method, the influence factors on the hydroxyapatite coating was explored. The results show that multiwalled carbon nanotubes functionalized with anionic groups form an efficient matrix for the growth of hydroxyapatite crystals. It also indicates that not only the pH affect the component of the composites, but also the aging temperature and aging time have a great influence on the particle size and thickness of hydroxyapatite deposited on the surface of the multi-walled carbon nanotubes.