Surface-modified Biphasic Calcium Phosphate/Poly (L-lactide) Biocomposite  

作　　者：杨为中 尹光福 

机构地区：[1]College of Material Science and Engineering,Sichuan University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2009年第1期81-86,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Research Fund for the Doctoral Program of Higher Education of China (No. 20060610024)

摘　　要：Biphasic calcium phosphate （BCP） powders were prepared by hydrolyzation proc-ess and surface-modified by directly grafted L-lactide （LLA） onto the surface of BCP through a chemical linkage. The grafting ratio of organic groups was 9 wt%. After surface modification, the surface of BCP powders was covered by the lamella-shaped crystal. Poly （L-lactide） was mixed with BCP to form the BCP/PLLA biocomposite. Modified BCP （mBCP） particles could be uniformly dis-persed in PLLA matrix. The compressive strength of the mBCP/PLLA composite is 115 MPa, 28% higher than that of unmodified-BCP/PLLA composite. The improved mechanical strength is attributed to the enhanced adhesion between the inorganic BCP filler and the organic PLLA matrix.Biphasic calcium phosphate （BCP） powders were prepared by hydrolyzation proc-ess and surface-modified by directly grafted L-lactide （LLA） onto the surface of BCP through a chemical linkage. The grafting ratio of organic groups was 9 wt%. After surface modification, the surface of BCP powders was covered by the lamella-shaped crystal. Poly （L-lactide） was mixed with BCP to form the BCP/PLLA biocomposite. Modified BCP （mBCP） particles could be uniformly dis-persed in PLLA matrix. The compressive strength of the mBCP/PLLA composite is 115 MPa, 28% higher than that of unmodified-BCP/PLLA composite. The improved mechanical strength is attributed to the enhanced adhesion between the inorganic BCP filler and the organic PLLA matrix.

关 键 词：biphasic calcium phosphate （BCP） surface modification GRAFTING COMPOSITE poly L-lactide 

分 类 号：O631.3[理学—高分子化学]