成型温度及压力对降解型PLLA/β-TCP
骨折内固定材料强度的影响
Preparation of Biodegradable Poly L-Lactide/β-Tricalcium Phosphate Fracture Innerfixation Composites
作者:廖立(四川大学 材料科学与工程学院 ,四川 成都 610065);董刚(四川大学 材料科学与工程学院 ,四川 成都 610065);陈琳(四川大学 材料科学与工程学院 ,四川 成都 610065)
Author:(School of Materials Sci. and Eng, Sichuan Univ., Chengdu 610065, China);(School of Materials Sci. and Eng, Sichuan Univ., Chengdu 610065, China);(School of Materials Sci. and Eng, Sichuan Univ., Chengdu 610065, China)
收稿日期:2005-10-20 年卷(期)页码:2006,38(4):92-95
期刊名称:工程科学与技术
Journal Name:Advanced Engineering Sciences
关键字:β-磷酸三钙; 聚乳酸; 骨折内固定
Key words:β-tricalcium phosphate; poly L-latic acid;fracture innerfixation
基金项目:国家“863”高技术资助项目(2002AA326080);教育部优秀青年教师教学科研奖励基金资助项目(2002123)
中文摘要
讨论了以PLLA和β-TCP为原料以高温低压力条件下的模压成型作为成型手段,制备了β-TCP/PLLA复合骨折内固定材料,并对所得复合材料的力学性能进行了测试,对影响材料的最终力学性能的因素作了分析。结果表明:以较低的成形压力(5 MPa)、200 ℃的成形温度,β-TCP粉末含量为20%时,制得的复合材料的力学性能最好。制备的复合材料的抗弯强度约为80 MPa,抗压强度约为75 MPa,基本满足骨折内固定的要求,为进一步的研究工作打下了基础。
英文摘要
A process which consists of a solvent casting stage, a film crush up, and a compression molding stage was used to prepare fracture innerfixation composite materials of β-TCP/PLLA . The mechanical strength of these composite materials was tested and the factors which would affect the mechanical strength were analyzed. The experimental results showed that the β-TCP/PLLA composite materials manufactured under the conditions of 200 ℃ molding temperature and 20% β-TCP would possess a much better mechanical strength. The compressive yield strength and the bending strength of the composite were nearly 75 MPa and 80 MPa.
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