Structure dielectric correlation of PEO/PVP incorporated with biosynthesized gold nanoparticles
| Autor: | M.I. Youssif, A.M. Abdelghany, H. M. Zidan, D.S. Rashad, E.M. Abdelrazek |
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| Rok vydání: | 2020 |
| Předmět: |
Permittivity
Materials science Polymers and Plastics Organic Chemistry Doping 02 engineering and technology Dielectric Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Chemical engineering Transmission electron microscopy Colloidal gold Materials Chemistry Dielectric loss Polymer blend 0210 nano-technology |
| Zdroj: | Journal of Polymer Research. 27 |
| ISSN: | 1572-8935 1022-9760 |
| DOI: | 10.1007/s10965-020-02348-2 |
| Popis: | Fresh leaves of Chenopodium murale (C. murale) have been used for the biosynthesis of gold nanoparticles (AuNP’s). AuNP’s have incorporated into polyethylene oxide /polyvinyl pyrrolidone (PEO/PVP) polymer blend by using the casting process. Transmission electron microscopy (TEM) reveals that AuNP’s are poly dispersed with size ranging 5–23.1 nm. Dc-conductivity shows an increase of conductivity (σ) with increasing temperature and the filler contents. Moreover, the AC conductivity (σac) and dielectric loss tangent (tan δ) have been investigated. The dielectric constant (e') and dielectric loss (e") are calculated from room temperature and up to 363 K. The inverse relation between permittivity (e′) and frequency was correlated to dipoles direction of the electric field while higher dielectric loss (e″) are attributed to the mobile charges in the blend matrices. Correlated barrier hopping model (CBH) proposed as a suitable route that elucidates the behavior of pure PEO/PVP polymer blend doped with Au-nanoparticles. |
| Databáze: | OpenAIRE |
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