摘要
采用硬脂酸对β-磷酸三钙(β-TCP)进行表面改性,并研究了β-TCP与硬脂酸的界面作用,通过透射电子显微镜(TEM)、热重分析仪(TGA)以及X光电子能谱(XPS)对改性前后β-TCP的形貌、热失重和表面基团进行表征;采用静电纺丝法制备不同质量配比的β-TCP/PLLA和改性β-TCP/PLLA复合纳米纤维膜,用扫描电镜(SEM)观察复合膜的形貌,并研究其力学性能。结果表明,硬脂酸包覆在β-TCP表面,改性后的β-TCP具有一定疏水性,硬脂酸的H+可与β-TCP中PO3-4的1个O发生质子化反应形成—OH;硬脂酸改性减轻了β-TCP微粒的团聚,可以得到连续均匀的纤维,改性后的β-TCP/PLLA复合纳米纤维膜的力学性能较改性前有明显提高。
β-tricalcium phosphate（ β-TCP） was modified by using stearic acid,and the mechanism of interfacial interactions between β-TCP particles and stearic acid was studied by transmission electron microscopy（ TEM）,thermal gravimetric analyzer（ TGA） and X-ray photoelectron spectroscopy（ XPS）. The β-TCP/PLLA and modified β-TCP/PLLA composite nanofiber membranes of different quality ratios were prepared by electrospinning. Their morphologies were observed by using scanning electron microscope（ SEM） and their mechanical properties were also studied. The results indicated that the stearic acid was coated on the surface of β-TCP particles,and modified β-TCP was hydrophobic. H＋of stearic acid could produce protonation reaction with O of PO3-4from β-TCP and then generate —OH. The modification of β-TCP particles by stearic acid could reduce their agglomeration and obtain the continuous and uniform nanofibers. The mechanical properties of the modified β-TCP / PLLA composite nanofiber membranes were improved more significantly than that of β-TCP / PLLA.
出处
《分析测试学报》
CAS
CSCD
北大核心
2016年第3期332-336,共5页
Journal of Instrumental Analysis
基金
国家自然科学基金项目(51471110)
上海市自然科学基金项目(09ZR1422100)
关键词
Β-磷酸三钙
表面改性
形貌
表面基团
力学性能
β-tricalcium phosphate
surface modification
morphology
surface perssad
mechanical properties
