Effect of Surface Grafted Hydroxyapatite on the Improved Performance of Hydroxyapatite/Poly(ε-caprolactone) Scaffold

Hydroxyapatite nanoparticles (HAP) were surface-grafted with poly(ε-caprolactone) (PCL) using two types of hydroxyl groups: inherent hydroxyl groups within HAP and hydroxyl groups of poly(2-hydroxyethyl methacrylate) (PHEMA) grafted on the HAP surface by atom transfer radical polymerization (ATRP). The grafting efficiency and the amount of grafted polymer were evaluated by thermal gravimetric analysis (TGA). The colloidal stability testing...