Kinetic Study of Calcium Phosphate Cement Containing Chitosan in Its Liquid Phase
In this study, the kinetic mecha-nisms for thehydration process of calcium phosphate cement (CPC)containing chitosan in its liquid phase were investigated by X-raydiffraction quantitative analysis. The powder componentconsisted of an equimolar mixture of tetracalcium phosphate anddicalcium phosphate anhydrous. The liquid component consistedof chitosan (3 wt %), citric acid (5 wt %) and glucose (15 wt %)solution. The results show that the hardening process of CPC isinitially controlled by the dissolution of reactants in a 2-h periodand subsequently by diffusion through the product layer ofhydroxyapatite (HA) around the grains. The compressivestrength rises approximately linearly with the increase of theextent of conversion in a 2-h period, and a maximumcompressive strength of 30.2±0.8 MPa is obtained in 2 hours.Then the compressive strength drops a little with an increase inthe extent of conversion. The final product of setting reaction isacicular HA crystal.
Hua Liu Ying Tan
College of Materials Science and Engineering South China University of Technology Guangzhou 510632, Department of Orthopaedics First Affiliated Hospital of Jinan University Guangzhou 510630, Peoples
国际会议
成都
英文
1-3
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）