摘要
采用硅烷偶联剂KH-570对羟基磷灰石粉体进行表面修饰,使羟基磷灰石在聚合物介质中有较好的相容性和分散稳定性。采用红外光谱、热重、差热、激光粒度、Zeta电位和X射线衍射等方法对表面修饰前后的羟基磷灰石进行表征分析。结果表明,KH-570硅烷偶联剂结合在羟基磷灰石表面,并未对其晶体产生明显影响;羟基磷灰石经修饰后在水溶液中的Zeta电位绝对值增加,分散稳定性提高,粒子团聚程度降低,纳米级颗粒尺寸从272.8nm减小到166nm,Cd2+吸附性能随增重率的增加而降低。
The surface of hydroxyapatite was modified using silane coupling agent KH-570 to introduce organic chains to enhance the dispersity and interface compatibility of hydroxyapatite in polymer substrate. Several characte- rization methods were applied to analyze the hydroxyapatite before and after modification such as FTIR, TG, DSC, la- ser particle sizer, Zeta potential and XRD. The results showed that silane coupling agent KH-570 had been introduced onto the surface of HAp, which had less influence on the crystal of HAp. The absolute value of Zeta potential of mo- dified hydroxyapatite was increased so that the stability of dispersion was enhanced and particle agglomoration was de- creased. The particle size of nano-dispersed hydroxyapatite was reduced from 272. 8nm to 166nm.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2012年第6期117-120,共4页
Materials Reports
基金
辽宁省教育厅重点实验室项目(2008S014)
辽宁省自然科学基金(20082151)
教育部留学归国人员启动基金(教外司留(2009)1001号)
关键词
偶联剂KH-570羟基磷灰石重金属吸附表征
silane coupling agent KH-570, hydroxyapatite, heavy metal adsorption, characterization