采用热处理还原银盐原位引入银粒子的方法,成功制备了天然石墨-纳米银/聚氨酯(C-Ag/PU)导电复合薄膜.并通过透射电镜(TEM)、扫描电镜(SEM)观察了该复合薄膜的微观结构,用X射线衍射仪(XRD)跟踪了银的还原和银粒子的生长过程,探讨了加热温度和加热时间对银还原过程的影响,研究了纳米银的生成和聚集对C/PU复合体系导电性能的影响.结果表明,随着热处理的进行,银粒子不断地生成和聚集,最终以纳米尺寸(约10 nm)均匀分散在聚合物基体中.纳米银粒子在天然石墨粒子之间起到了桥梁的作用,改善了复合体系的导电通路,显著提高了复合体系的导电性.
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