Abstract:

N,O-carboxymethyl chitosan （N,O-CMC）/nano-β-tricalcium （n-β-TCP） composite materials were prepared by means of mechanical mixing coupled with  hot press molding.   In order to compare the physical properties and morphologies  of the composites with different mass ratios,  the water absorption,  apparent porosity and compressive strength of the composite materials were investigated.   The results show that  with n-β-TCP content increasing the water absorption and apparent porosity increase ,  but  the compressive strength decreases first and then increases.   The confocal laser scanning microscopy shows that with the increase of the addition amount of n-β-TCP,  the pores existed in the composites are well distributed,  what’s more,  the pore size tends to be uniform.   When m(N,O-CMC)∶m(n-β-TCP)=1,  the pores are well distributed in the obtained composites and the pore sizes are about 1— 6 μm.   Moreover,  the n-β-TCP powder is  well distributed in the N,O-CMC.

Key words: N,O-carboxymethyl chitosan, nano-β-tricalcium phosphate, composite material, physical property