原位一步法制备表面银化的聚酰亚胺纳米复合薄膜

Development of polyimide nano-composite films with silvered surface by in-situ and single-stage self-metallizing techniques

介绍了原位一步自金属化制备银/聚酰亚胺(PI)纳米复合薄膜的方法。以银盐为线索,评述了各种银盐/二酐/二胺体系所制得的复合薄膜的性能。采用该法可制得具有较高的表面反射率和电导率,优异的界面粘结性,并保持母体PI大部分优异性能的复合薄膜;其反射性和导电性与银含量,银的配位体或者反离子,二酐、二胺的种类及热处理工艺等因素相关。使用三氟乙酰丙酮银盐(AgTFA),银的质量分数为12％以上,进行适当的热处理,则某些体系所制薄膜的表面反射性和导电性可以达到纯银的水平,而其他的银盐体系制备的薄膜只能达到中等反射性而无导电性,但对薄膜表面进行轻微抛光可以提高反射性和导电性。

The method to prepare silver/polyimide films was introduced. Properties of all kinds of systems on the basis of silver(I) salt were reviewed.The metallized films with excellent surface reflectivity and conductivity can be fabricated in that method with its outstanding metal-polymer adhesion obtained and the essential mechanical and thermal properties of the parent polyimide films retained. Considerable factors such as silver concentration, ligand/anion, poly (amic acids) structures derived from a variety of dianhyde and diamine, and the cure cycles, have great effects on the surface reflectivity and activity of the composite films. With (trifluoroacerylacetone) silver(I) as additive, at higher mass fraction of silver, 12% or higher,appropriate thermal curing of selected silver-doped poly(amic acids) leads to the yield of a reflective and active silver surface similar to that of the native silver metal, with other silver-doped systems only moderate reflective films are observed without conductivity. However, with a slight polish on the surface, the reflectivity and conductivity are improved greatly.