Effect of Melt Flow Rate of Polyethylene on Bioactivity and Mechanical Properties of Polyethylene /Titania Composites

摘要

Bioactive bone-substitutes with mechanical properties analogous to those of natural bone are strongly desired to be developed. In the present study, HDPE/TiO2 composites were prepared from titanium dioxide (T1O2) nano-powder with anatase structure and high density polyethylene (HDPE) with different melting flow rate (MFR) through a batch-kneader mixing. The composite with a uniform dispersion of T1O2 powder were prepared. The composite prepared from HDPE of MFR=8 shows the highest bending strength (about 50 MPa) and Young's modulus (about 7.5sGPa) within the range of the mechanical properties of human cortical bone. The composites formed;9patite on their surfaces in a simulated body fluid within 7 days. Therefore, these PE/TiC>2 compo'sjtes with such mechanical properties and bioactivity are considered to be useful as bone-repairing materials.