In‐situ‐Synthetized Silver/Epoxy Nanocomposites: Electrical Characterization by Means of Dielectric Spectroscopy

Abstract

In situ synthesis of silver/epoxy nanocomposites was achieved by UV‐induced polymerization through a simultaneous photoinduced electron transfer and cationic polymerization processes. The FESEM morphological investigation showed a uniform dispersion of silver nanoparticles within the polymeric matrix having narrow size distribution between 15 and 20 nm. The evolution of dielectric properties with frequency and NP content seem to indicate that the nanocomposites of this study remain below the percolation threshold. The dielectric spectroscopy results are in good agreement with the morphological investigation, which showed the absence of NPs percolative network.

In Situ Synthesis of Polymer Embedded Silver Nanoparticles via Photopolymerization

“…The peaks related to silver NPs are reported in literature to be: 38.7, 44.1, 64.6, and 78.3°. These data points correspond to cubic crystalline structure of silver and assigned to (111), (200), (220), and (311) plans, respectively . The recorded peak at 2 θ angle for our sample were: 38, 44, 64, and 76°.…”

“…This absorption can be attributed to the plasmon resonance effect arising from the appearance of metal particles, suggesting the formation of silver nanoparticles.…”

“…These data points correspond to cubic crystalline structure of silver and assigned to (111), (200), (220), and (311) plans, respectively. [19] The recorded peak at 2u angle for our…”

A representative and comprehensive review of the electrical and thermal properties of polymer composites with carbon nanotube and other nanoparticle fillers

“…A homogeneous dispersion of fillers is not always a condition for obtaining optimal properties of the CPNC. For example data available in the literature show that the electrical properties, in particular the electrical percolation threshold ( p c ), of CPNCs may reach high levels when the dispersion of conductive fillers is optimal . However, forming aggregates of conductive fillers in some way can in some cases reduce p c and this is essential for making CPNCs lightly loaded .…”

“…Some applications using CPCs require higher values of the electrical conductivity. Therefore, the incorporation of metallic NPs such as Ag‐NPs possessing good intrinsic electrical and thermal conductivity has been employed . A high value of electrical conductivity of ca 10 3 S cm −1 was reported by Jiang et al .…”