Structural-phase state and surface properties of composite materials based on polylactide and hydroxyapatite

Abstract

The phase composition and unit cell parameters were determined for composites based on polylactide and hydroxyapatite with the polylactide/hydroxyapatite weight ratios of 90/10, 80/20, 70/30, and 60/40. As the polylactide content of the composites is increased, they become less hydrophilic, and the surface energy σ_S-G increases from 29.13 to 74.35 mJ m^–2. The sample with the component weight ratio of 70/30 is characterized by the maximal roughness, and the Ca²⁺ and Mg²⁺ ions from simulated body fluid are actively adsorbed onto its surface, as proved by SEM examination of the composites.