纳米银-聚吡咯导电复合薄膜的制备

Preparation of Silver Nanoparticles-Polypyrrole Conductive Composites Film

为研究制备纳米银-聚吡咯(Ag-PPy)导电复合薄膜的最佳聚合工艺,分别采用静置、超声和磁力搅拌三种聚合工艺制备了纳米银-聚吡咯导电复合薄膜。用四探针法测量了复合薄膜的表面电阻值,用三维视频显微镜(3-DVM)观测其表面形貌并测定了膜层的厚度,用X射线衍射仪(XRD)分析了膜层物质的晶型。结果表明:采用频率为25kHz、功率为70 W的超声工艺制备的Ag-PPy导电复合薄膜的综合性能最好,在该条件下得到的复合薄膜表面平整,纳米银粒子在聚吡咯中分布连续且均匀,表面电阻值可达到0.68kΩ,复合物粒子在基体上沉积的厚度为56.28μm,沉积速率为8.67mg·cm-2·h-1。

The Ag nanoparticles-polypyrrole（Ag-PPy）conductive composite films were prepared under three polymerization processes included stewing,ultrasonic treatment and magnetic stirring,to research the optimum polymerization technology of AgPPy composite film.The sheet resistance of films were determined by four-point probe method;3-DVM was employed to view the surface morphology and to determine the deposition thickness,and XRD was performed to characterize the crystal forms of composite coating.Results showed that the polymerization reaction proceeded the best under ultrasonic treatment with the ultrasonic frequency and power being 25 kHz and 70 W respectively.The obtained film was flat on the surface with silver nanoparticles and polypyrole uniformly distributed,meanwhile,the sheet resistance of the film was determined to be 0.68 kΩ,the deposition thickness of the composite particles on subtract was 56.28μm,the deposition rate 8.67 mg·cm-2·h-1.