【摘要】 在纳米Al2O3表面接枝聚缩醛可在粒子表面建立起空间位阻稳定层,不但提高了纳米粒子的分散稳定性,还可以增强纳米粒子与树脂基体的相容性。X射线光电子能谱(XPS)的分析结果表明,经过聚缩醛接枝改性的纳米Al2O3的Al(2p)峰几乎消失,O(1s)峰也相应降低,与之相对应的是C(1s)峰有了明显的增长,对C(1s)峰精细扫描及分峰拟合表明,纳米Al2O3表面碳元素中有61.92%属于接枝物聚缩醛的有机碳,接枝物聚缩醛与纳米Al2O3形成了Al—O—C键,两者产生化学结合。同时对比XPS和热失重分析(TG)的数据结果,可以推测聚缩醛主要分布在纳米Al2O3的表面,而在体相中独立存在的概率较小。更多还原

【Abstract】 Steric hindrance layer can be established when the surfaces of nano-Al₂O₃ were grafted with polyacetal,which（increased） the dispersibility of the nano-particles as well as the compatibility between the particles and the resin matrix. Examination of X-ray photoelectron spectroscopy（XPS） demonstrated that the peak of Al（2p） on polyacetal grafted Al₂O₃ surfaces（almost） disappeared, while that of O（1s） increased.On the contrary,peak of C（1s） increased obviously.Results of fine scanning and（deconvolution） into multiple sub-peaks of C（1s） indicated that 61.92% of carbon on the surfaces of nano-Al₂O₃ was attributed to the grafting polyacetal.This shows that an effective modification layer formed on Al₂O₃ surfaces,and the grafting polyacetal was chemically bound with nano-Al₂O₃.Based on XPS and TG analysis,it is conjectured that the grafting polyacetal is mainly（distributed） on nano-Al₂O₃ surfaces.更多还原