无机纳米氧化铝/聚酰亚胺复合膜的表征

Characterization of Inorganic Nano-Alundum Composite Film of Polyimide

研究无机纳米掺杂有机复合薄膜力学性能、热学性能、电学性能变化规律的关键在于快速、准确地掌握复合膜中纳米无机物的掺入量及其颗粒大小和分布状态。文章通过X射线荧光光谱、红外光谱、扫描电子显微镜、原子力显微镜等测试方法对无机纳米氧化铝/聚酰亚胺复合薄膜的三氧化二铝掺入量、化学结构及表面形貌进行了表征分析(该材料为本研究室制备的)。结果表明:聚酰亚胺有机相与三氧化二铝无机相之间形成了键联型复合杂化体系;三氧化二铝粒子呈纳米级均匀地分散在聚酰亚胺基体中,颗粒直径均在50nm以下;利用X射线荧光光谱法测定出三氧化二铝的质量含量为7·9%,利用该方法定性、定量分析无机纳米掺杂有机复合薄膜材料中的无机组分具有样品不需要预处理、不需要加载电荷(可用于分析绝缘材料)、非接触性、非破坏性、速度快、准确度高等优点。

The key to the study on the regularity about the mechanical,thermology and electricities property of the inorganic nano-mingled organic composition thin film is to understand the incorporated quantity,the particle size and distribution of nano-inorganic matter in the membrane quickly and accurately.In the present paper,the chemical structure,surface morphology and the actual content of nano-Al2O3 of the nano Al2O3-composite film of polyimide were characterized by X-ray atomic fluorescent spectroscopy（XRF）,Fourier transform infrared spectroscopy（FTIR）,scanning electron microscopy（SEM） and atomic forced microscope（AFM）.The results are that the organic phase of PI and the inorganic phase of Al2O3 formed a complex composite hybrid system of bond-to-bond pattern,the nano-Al2O3 particles in the film of PI are dispersed homogeneously,and the diameter of the particle is smaller than 50 nm;the weight content of Al2O3 is 7.9% by XRF.The approach we used is an effective way of analyzing the inorganic component of the organic composite film materials doped with the inorganic nano-phase materials with the merits of no pretreatment,no fed charge（for analysis of insulation materials）,no-contagion,no destruction,high speed and high accuracy,etc.