%0 Journal Article
%T 硬脂酸改性β-磷酸三钙及其复合材料机械性能研究
%A 陈赛
%A 马凤仓
%A 耿芳
%A 刘平
%A 刘新宽
%A 李伟
%J 材料科学与工业
%D 2016
%R 10.11951/j.issn.1005-0299.20160111
%X 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.</br>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 the β-TCP/PLLA composites dramatically. The β-TCP particles with surface modification distribute in the PLLA matrix uniformly and combine with the PLLA matrix closely.
%K β-磷酸三钙
%K 硬脂酸
%K 表面改性
%K 复合材料
%K 机械性能&lt
%K /br&gt
%K β-tricalcium
%K phosphate
%K stearic
%K acid
%K surface
%K modification
%K composites
%K mechanical
%K properties
%U http://hit.alljournals.cn/mst_cn/ch/reader/view_abstract.aspx?file_no=20160111&flag=1