摘要
聚酰亚胺(PI)是一种具有优异性能的聚合物材料,广泛应用于航空航天、微电子和通讯等高技术领域。近年来,对聚酰亚胺材料的研究正朝着高性能化、多功能化和低成本化方向发展。其中聚酰亚胺/银(PI/Ag)复合薄膜是近年来研究异常活跃的领域,表面银层的存在使复合薄膜获得优异的光学性能、电性能和磁性能。本文采用离子交换技术制备聚酰亚胺/银(PI/Ag)复合薄膜。首先,PI薄膜在氢氧化钾(KOH)溶液的作用下进行表面化学刻蚀,然后在硝酸银溶液(AgNO)的作用下进行离子交换,在3PI薄膜表面形成了含有Ag+的复合层。最后,附有Ag+的PI薄膜经过热处理后重新亚胺化使Ag+形成Ag。对复合薄膜分别进行了扫描电镜测试(SEM)、原子力显微镜测试(AFM)、X射线衍射(XRD)性能表征。SEM的测试结果表明复合薄膜表面银层的致密程度随着AgNO3处理时间和浓度的增加而增加,但是当AgNO3处理时间和浓度继续增加到一定程度时反而减少;AFM的测试结构表明随着Ag NO3处理时间的增加,薄膜表面银层平整度增加,对于AgNO3处理浓度而言,取0.04M左右为宜。XRD测试表明薄膜表面纳米Ag颗粒的结晶性能良好,均为面心立方结构。
Polyimide（PI） is a kind of high performance polymer materials with excellent properties, widely used in aerospace, microelectronies and communications and other high-tech fields. The development of science and technology has put forward higher and newer requirements on materials, materials research constantly toward the high performance, muhifunction and low cost development direction. Silver Nitrate （AgNO3） nanocomposite layer on flexible polyimide （PI） substrate was prepared via an ion exchange technique. First, PI film underwent chemical surface modification in aqueous KOH solution. Subsequently, PI film underwent ion exchange in aqueous AgNO3 so- lution. Finally, hydrothermal treatment of the Ag＋-loaded PI films after treatment in an aqueous ammonia solution led to Ag formation in the surface-modified layers. Composite films were conducted the scanning electron microscope （SEM）, AFM, X-ray diffractometer （XRD）. The SEM test result indicated the compound thin film surface the silver compact degree increases along with the silver nitrate process time and the density increase, but when the silver ni- trate process time and the density continues to increase to certain degree instead reduces; The test structure of AFM showed that with the increase of silver nitrate treatment time, surface silver film layer roughness increases, the silver nitrate concentration, take around 0.04M appropriate; The XRD test shows the crystallization properties of Ag on the thin film surface nanoparticles is good, all of which are face-centered cubic structure.
出处
《化学工程师》
CAS
2015年第1期14-18,共5页
Chemical Engineer
基金
哈尔滨理工大学大学生创新创业训练计划项目
关键词
聚酰亚胺
银
复合薄膜
离子交换
微结构
polyimide
silver composite film
ion exchange
microstructure
作者简介
张鸶鹭（1994-），女，在读本科生，高分子材料与工程专业，研究方向：聚合物复合材料。
通讯作者：翁凌，博士，副教授，主要从事聚合物基介电功能复合材料的研究工作。
