| This paper is about some basic studies for a kind of bone repair material multi-walled carbon nanotubes/ nano-hydroxylapatite composite. Two main issues were investigated in these studies. One was about the surface treatment of multi-walled carbon nanotubes (MWNTs) with anodic oxidation process; the other was the preparation and characterization of MWNTs/hydroxylapatite composite Firstly, based on the anodic oxidation process for carbon fiber, a modified anodic oxidation process for MWNTs was established and used for the treatment of MWNTs. The treated MWNTs samples were then analyzed by XPS. Compared with the sample that treated by nitric acid, this anodic oxidation process was consider a novel, fast, pollution-free, feasible and fairly effective method for the surface treatment of MWNTs. Furthermore, anodic oxidized MWNTs with different treating conditions were investigated for optimization. And the results showed that the supplied quantity of electricity and the specific conductivity of the alkali electrolyte were the main influencing factors for the surface treatment of MWNTs. And the increase of total polar functional groups on the MWNTs surface was mainly attributed to the increased hydroxyls and decreased carbonyls.Another issue of the paper was the preparation and characterization of MWNTs/HA (hydroxylapatite) composite. Firstly, optimizations were carried out for the preparation of nano-HA with the help of ultrasonic, and FTIR, XRD and TEM were used to character the received HA samples, And the results indicated that they were all composed by spindle-like nano-sized hydroxyapatite crystals which were of the same crystal phase and high crystallinity without sintering. Then MWNTs/HA composite was got by in-situ preparation and was analyzed by FTIR, XRD and TEM. The results showed that no MWNTs aggregations were observed from the HA matrix and some of the HA was deposited onto the MWNTs surface indicating a good compatibility of the two phase.
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