Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
ACS Appl Mater Interfaces. 2012 Mar;4(3):1449-55. doi: 10.1021/am2016969. Epub 2012 Feb 10.
Flexible polymer films with high electrical conductivity were prepared through a simple coating of well-dispersed silver nanoparticle (AgNP) and multiwalled carbon nanotube (CNT) solution. The hybrid film with surface resistance as low as 1 × 10(-2) Ω/sq was prepared by controlling the annealing temperature in air and by using a suitable composition of silver nitrate/CNT/poly(oxyethylene)-oligo(imide) (POE-imide) in the ratio 20:1:20 by weight. During the heating, color of the film surface changed from black to golden to milky white, indicating the accumulation of AgNPs through surface migration and melting into CNT-connected networks. Thermogravimetric measurements showed that the transition temperature of 170 °C was responsible for the POE-imide degeneration and the subsequent Ag melting with a decrease in the surface resistance from 2.1 × 10(5) to 2.0 × 10(-1) Ω/sq, which was able to illuminate light-emitting diode lamps because of the formation of a continuous Ag network.
通过简单地涂覆分散良好的银纳米粒子（AgNP）和多壁碳纳米管（CNT）溶液，制备出具有高导电性的柔性聚合物薄膜。通过控制在空气中的退火温度，并使用合适的硝酸银/CNT/聚（氧乙烯）-聚（亚胺）（POE-imide）的重量比为 20:1:20 的组成，制备出表面电阻低至 1×10(-2) Ω/sq 的混合薄膜。在加热过程中，薄膜表面的颜色从黑色变为金黄色再变为乳白色，表明 AgNPs 通过表面迁移和熔入 CNT 连接网络而积累。热重测量表明，170°C 的转变温度是 POE-imide 退化和随后 Ag 熔化的原因，表面电阻从 2.1×10(5) 降低到 2.0×10(-1) Ω/sq，由于形成连续的 Ag 网络，因此能够点亮发光二极管灯。
