Citation: LIU Kong-Hua, LIU Lan, GAO Hong, LUO Yuan-Fang, JIA De-Min. In situ Preparation of Epoxy-Based Conductive Nanocomposites Containing Nanosilver-Decorated Carbon Nanotubes[J]. Acta Physico-Chimica Sinica, ;2012, 28(03): 711-719. doi: 10.3866/PKU.WHXB201112213 shu

In situ Preparation of Epoxy-Based Conductive Nanocomposites Containing Nanosilver-Decorated Carbon Nanotubes

1.
College of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China

Received Date: 31 October 2011
Available Online: 21 December 2011
Fund Project: 国家自然科学基金(50608034, 50873036) (50608034, 50873036) 广东高校科技创新重点项目(CXZD1106) (CXZD1106)华南理工大学中央高校基本科研业务费(2012ZZ0006)资助项目 (2012ZZ0006)

Nanosilver-decorated carbon nanotubes (CNTs) were prepared by introducing CNTs and silver acetate into an epoxy-imidazole curing system and simultaneous in situ thermal degradation of an Ag-imidazole complex. Differential scanning calorimetry (DSC) results indicated that modified CNTs played a certain role in promoting the curing of the epoxy. The structure of the silver acetate-imidazole complex was characterized by X-ray diffraction (XRD). The size of the nano-silver particles resulting from degradation of the Ag-imidzole complex was between 21 and 24 nm, and between 11 and 13 nm when the Ag-imidzole complex was added to the epoxy matrix. When silver flakes with a mass fraction of 80% was added to the composites, the volume resistivity of the nanosilver-decorated CNTs/epoxy conductive composite was as low as 9×10^-5 Ω·cm. The optimum conductivity and shear strength were achieved when the ratio of nanosilver and CNTs was 80:20 (mass ratio). Scanning electron microscopy (SEM) revealed the structural morphology of the composite.
- Low temperature sintering,
- Nanocomposite,
- Contact resistance,
- Conductive filler,
- Volume resistivity
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