牙科复合树脂增韧用单壁碳纳米管的表面改性和微结构

Surface Modification and Microstructure of Single-walled Carbon Nanotubes for Dental Composite Resin

为了使单壁碳纳米管(SWNTs)在牙科复合树脂中获得良好的单分散和牢固的界面结合,将其回流、氧化处理后,用APTE处理,然后用溶胶-凝胶法在其外侧壁包裹一层纳米SiO2颗粒,用硅烷偶联剂对包裹后的SWNTs进行化学改性,用红外光谱和透射电镜检测改性结果,发现透射电镜照片显示在SWNTs外壁上包裹了一层纳米级颗粒;红外光谱上出现SiO2的特征吸收峰;制备纳米复合树脂试件,用透射电镜观察,发现SWNTs镶嵌在树脂基质内的其他填料之间。

In order to improve its dispersion condition in dental composite resin and enhance its interaction with the matrix, single-walled carbon nanotubes （SWNTs） were refluxed and oxidized, then treated by APTE. Their outer surface were coated by nano-SiO2 particles using sol-gel process, then further treated by organosilanes ATES. IR and TEM were used to analyze modification results. TEM pictures showed nano-particles were on the surface of SWNTs; IR showed characteristic adsorbing bands of SiO2. Composite resin specimen with modified SWNTs was prepared and examined by TEM. SWNTs were detected in composite resin matrix among other inorganic fillers.