The poly(vinyl alcohol)/nano-hydroxyapatite (mPVA/n-HA) composites were prepared by thermal processing of PVA

and the solid state shear milling technology(S3M) developed in SKLPME was adopted to improve the dispersion of n-HA in PVA matrix.The structure and properties of the composites were also studied.The results showed that the hydrogen bonds or [HO]Ca2+[OH] between n-HA and PVA were enhanced under the strong effects of mixture

dispersion and activation of pan-milling equipment

which could effectively improve the interfacial strength between n-HA and PVA

and increased the dispersion of n-HA particles in PVA matrix.The strong interactions between n-HA and PVA largely increased the initial thermal decomposition temperature of PVA

and endowed the composites with large thermal processing windows.These interactions could also act as the physical crosslinking points in system

thus inhibited the penetration of water into the composites

and shortened the time to the equilibrium swelling

i.e.the water resistance of the composites was improved.The well dispersion of n-HA particles in matrix could efficiently exert their reinforcement effect on PVA

thus improved the tensile strength and elongation of the composites at break

e.g.

the tensile strength and elongation of the composite with 20 wt% n-HA were 27.7 MPa and 569.7%

respectively increased by 110% and 76% compared with mPVA.