摘要
为了提高β-磷酸三钙(β-TCP)复合材料的机械性能,采用硬脂酸(C17H25COOH)对β-TCP表面进行改性处理,研究了β-TCP与C17H25COOH的界面作用机理.利用透射电镜、傅里叶红外光谱、热重分析等技术分别对改性前后β-TCP的颗粒形貌、组分和表面—OH基团进行了表征,研究了改性β-TCP/聚左旋乳酸(PLLA)复合材料的机械性能,并利用扫描电镜观察了复合材料断面形貌.研究表明:硬脂酸包覆在β-TCP表面,改性后β-TCP粉末具有一定的疏水性,硬脂酸的H+可以与β-TCP中的PO43-的一个O发生质子化反应形成—OH.改性β-TCP/PLLA复合材料的机械性能相比改性前有明显提高,改性后的β-TCP微粒在PLLA中分散均匀,两者结合紧密.
To improve the mechanical properties of beta-tricalcium phosphate（ β- TCP） composite,β- TCP was modified using stearic acid（ C17H25COOH）. The mechanism of interfacial interactions between β- TCP particles and stearic acid was studied. The morphology,component and —OH of β-TCP＇s surface before and after surface modification were studied by TEM,FTIR,TG,DTG and XPS. The mechanical properties and the morphology of fracture surface of the modified β-TCP / poly-L-lactic acid（ PLLA） composite were also studied.The results indicate that the stearic acid coats on the surface of β-TCP particles,and the modified β-TCP powder is hydrophobic. H＋of stearic acid could produce protonation reaction with O of β- TCP＇ s PO43-and then generates —OH. Surface modification of β-TCP particles could improve the mechanical strengths of theβ-TCP / PLLA composites dramatically. The β-TCP particles with surface modification distribute in the PLLA matrix uniformly and combine with the PLLA matrix closely.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2016年第1期70-74,共5页
Materials Science and Technology
关键词
Β-磷酸三钙
硬脂酸
表面改性
复合材料
机械性能
β-tricalcium phosphate
stearic acid
surface modification
composites
mechanical properties
