摘要
目的观察溶液共混热压制备法能否提高纳米磷灰石(HA)/聚D,L-乳酸(PolyD,L杔actide,PDLLA)复合生物材料的力学性能。方法将HA/PDLLA分散至N,N-二甲基甲酰胺(DMF)有机溶剂中,在45℃下不断搅拌缓慢去除有机分散剂,干燥后打碎,放入模具中经100℃热压,获得纳米HA/PDLLA复合材料薄膜。结果透射电子显微镜(TEM)对不同含量的HA复合材料观察发现,纳米HA能被分散在PDLLA基材中。随着HA含量在复合材料中增加,HA出现了明显团聚现象,但总体上呈均匀的分布状态,说明热压前溶液共混处理有利于HA在复合材料中的分散。力学性能测试结果表明,上述溶液共混热压制备法能够增加HA与PDLLA的界面结合力,在合适的HA含量下,提高了材料的弹性模量、断裂应力及拉伸应力。结论溶液共混热压制备法能改善HA/PDLLA复合材料的力学性能。
Objective check if mechanical properties of Nano-apatite(HA)/ Poly(D,L-lactide)(PDLLA) biocomposite is improved by solution-coblending and hot-pressing techniques.Methods HA particles and PDLLA polymer,as two basic compositions of the biocomposite,were firstly dispersed in dimethyl formamide(DMF) dispersant,then the DMF was by inches cleaned out by intensively stirring in 45 oC.The resultant mixture including HA and PDLLA was fallen to pieces,and then pressed at 100oC in hot-pressing machine,finally,thin fi...
出处
《医用生物力学》
EI
CAS
CSCD
2008年第5期385-388,共4页
Journal of Medical Biomechanics
基金
乐山师范学院重点资助项目(20804)
关键词
溶液共混
热压
复合材料
力学性能
Solution co-blending
Hot-Pressing
Composite
Mechanical properties
