羟基磷灰石／聚己内酯复合材料的溶液共混制备与力学性能研究  

Solution-Co-blending Preparation and Mechanical Properties of Hydro-apatite/Polycaprolactone Composite Biomaterials

作　　者：邓迟[1] 杨晓兵[2] 鲁雄[2] 周绍兵[2] 屈树新[2] 翁杰[2] 

机构地区：[1]乐山师范学院,四川乐山610004 [2]材料先进技术教育部重点实验室,四川成都610031

出　　处：《表面技术》2008年第2期14-15,49,共3页Surface Technology

基　　金：教育部“跨世纪优秀人才培养计划”基金项目[教技函(2002)48号]

摘　　要：将羟基磷灰石(hydroxyapatite,HA)和聚己内酯(polycaprolactone,PCL)先分散到N,N-二甲基乙酰胺(DMAC)有机溶剂中,在60℃温度下不断搅拌,缓慢去除有机分散剂,干燥后打碎共混物,放入模具中在120℃热压,获得HA/PCL复合材料薄膜。红外光谱(FTIR)表征发现,HA/PCL复合材料的基本组成为HA和PCL,没有新的组成相出现,表明溶液共混处理属于物理混合,混合过程中没有产生新的组成。力学性能测试表明,溶液共混和热压制备方法能够增加HA与PCL的结合力,提高材料的弹性模量。HA与PCL的界面结合是机械性质的,微纳米尺度的HA填充相总体上易使HA/PCL复合材料脱落或松动,导致强度较低。另一方面,在本研究的制备工艺下,适当地控制HA的含量,微米级的HA能够明显地提高复合材料的屈服强度,使HA成为PCL基复合材料的增强相。Hydroxyapatite（HA） particles and Polycaprolactone （PCL）, as two basic compositions of composite were firstly dispersed in N, N-Dimethylacetamide（DMAC） dispersant, and then the DMAC was by inches cleaned out by intensively stirring in 60℃. The mixture obtained including HA and PCL was fallen to pieces, and then pressed at 120℃ in hot-pressing machine, finally, thin film of HA/PCL composite film was prepared. These results of FT-IR show that HA/PCL composite is made up of HA fillers and PCL matrix and no new chemical composition is found in as-preparation materials. Mechanical property testing illuminates that bonding strength between HA and PCL is enhanced and tensile modulus of HA/PCL composite is obviously improved. However, puny mechanical bonding, between HA fillers and PCL matrix directly leads to lower yield stress, while that composite containing 20% HA fillers exhibites a higher strength. On the other hand, under the condition of effectively controlling HA contents in microstructure of composite film, HA filler can make maximum stress of PCL-matrix composite improve and become a buildup composition of composite.

关 键 词：溶液共混 热压 复合材料 力学性能 

分 类 号：R318.08[医药卫生—生物医学工程]