摘要
采用硬脂酸(C17H35COOH)对纳米羟基磷灰石(n-HA)表面进行处理,并研究了n-HA与C17H35COOH的界面作用。透射电子显微镜(TEM)、傅立叶红外光谱(FTIR)以及X光电子能谱(XPS)分析表明,C17H35COOH在n-HA表面黏附,其中羧酸根离子(-COO-)与钙离子(Ca2+)之间形成了稳定的离子键,以羧酸钙形式存在。C17H35COOH改性后的n-HA与聚碳酸酯(PC)复合后,复合材料的力学性能与未改性n-HA相比有明显提高。扫描电子显微镜(SEM)结果显示,经处理后的HA微粒在PC中分散均匀,两者间结合紧密,无明显界面,复合材料的断裂呈明显的韧性断裂,随着n-HA无机粒子含量增加,复合材料的断裂也逐渐向韧性与脆性断裂共存转变。
In this paper, nano-hydroxyapatite（n-HA） was modified using stearic acid（C17H35COOH）, and the interfacial interactions between n-HA and C17H35COOH was also studied. Transmission electron microscopy （TEM）, Fourier transform infrared spectra （FTIR） and X-ray photoelectron spectra （XPS） analyses showed that the stearie acid molecular binded strongly to n-HA surface. Ionic bond was formed by the reaction between Ca^2＋ and C17H35COO- group. Surface modification of HA particles could improve the mechanical strengths of the n-HA/polycarbonate（n- HA/PC） composites dramatically. SEM observation showed that HA particles uniformly distributed in the PC matrix, both unifies closely, the not obvious interphase boundary, the composite materials break showed the obvious ductile fracture, increases along with the n-HA inorganic granule content, composite materials break also gradually to ductile and brittle fracture coexistence transformation, indicating that the interracial interaction between surfacemodified inorganic particles and polymer matrix is crucial for the increase of the mechanical strength of the composite.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2009年第7期1267-1273,共7页
Chinese Journal of Inorganic Chemistry
基金
科技部973(No.2007CB936102)资助项目
