硅酸盐学报2007，Vol.35Issue(11)：1538-1540,1545,4.
羟基磷灰石/外消旋聚乳酸复合材料的制备、力学性能及体外降解
PREPARATION, MECHANICAL PROPERTIES AND IN VITRO DEGRADATION OF HYDROXYAPATITE/POLY-RACEMIC LACTIC ACID COMPOSITE
摘要
Abstract
A hydroxyapatite/poly-D, L (racemic) lactic acid (HA/PDLLA) composite was prepared by recombination of liquid-phase adsorption. The mechanical properties of the composite were determined, and the degradation of the composite was investigated via simulation in vitro. Results illustrate that the mechanical properties of the composite are improved with a bending strength of 146.2 Mpa,a bend modulus of 2.5 Gpa, due to the addition of 10％ mass fraction of HA particles into the composite. Compared with pure PDLLA material, the bending strength is increased 9.4 Mpa, the bending modulus is increased 0.2 Gpa, and the decline of the tensile strength of the composite is not obvious. The mass loss of the 90％ PDLLA/10％ HA composite was less than 1％ during the initial 6 weeks, and the fmal mass loss was 5.4％ at the 12th week. The mass loss of the composite was smaller than that of pure PDLLA material by about 2％-3％ in the mid-later period of degradation.关键词
羟基磷灰石/外消旋聚乳酸复合材料/制备/力学强度/降解Key words
hydroxyapatite/poly-racemic lactic acid composite/preparation/mechanical strength/degradation分类
通用工业技术引用本文复制引用
王欣宇,单学智,韦明,韩颖超,李世普..羟基磷灰石/外消旋聚乳酸复合材料的制备、力学性能及体外降解[J].硅酸盐学报,2007,35(11):1538-1540,1545,4.基金项目
国家自然科学基金(50472041)资助项目. （50472041）
