scholarly journals Structural characterisation of printable noble metal/poly(vinyl-alcohol) nanocomposites for optical applications

Nanoscale ◽  
2015 ◽  
Vol 7 (32) ◽  
pp. 13537-13546 ◽  
Author(s):  
A. C. Hourd ◽  
R. T. Baker ◽  
A. Abdolvand
Keyword(s):  
Noble Metal ◽  
Ag Nanoparticles ◽  
Vinyl Alcohol ◽  
Heat Treating ◽  
Optically Active ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Structural Characterisation ◽  
Two Component ◽  
Optical Applications

Optically active nanocomposite films of Au or Ag nanoparticles dispersed in a PVA matrix were prepared by printing a two-component precursor and heat treating the printed layer.

scholarly journals Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 374 ◽  
Author(s):  
Ganeswar Sahu ◽  
Mamata Das ◽  
Mithilesh Yadav ◽  
Bibhu Prasad Sahoo ◽  
Jasaswini Tripathy
Keyword(s):  
Electron Microscopy ◽  
Ionic Liquid ◽  
Graphene Oxide ◽  
Dielectric Permittivity ◽  
Dielectric Relaxation ◽  
Ag Nanoparticles ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Dielectric Relaxation Behavior

This paper presents the dielectric characteristics of nanocomposite films of poly(vinyl alcohol) (PVA) embedded with silver (Ag) nanoparticles and graphene oxide(GO). The nanocomposite films were fabricated by using the solvent casting approach. The morphological analysis was carried out through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The dielectric relaxation behavior of nanocomposite films was analyzed in the frequency range of 101 to 106 Hz, by varying GO loading. The temperature effect was investigated over the temperature range of 40 to 150 °C. The effect of ionic liquid (IL) was also explored by comparing the dielectric behavior of films fabricated without using ionic liquid. The conductive filler loading variation showed a significant effect on dielectric permittivity(ε′), complex impedance (Z*) and electric conductivity (σac). The obtained results revealed that the dielectric permittivity (ε′) increased by incorporating Ag nanoparticles and increasing GO loading in PVA matrix. An incremental trend in dielectric permittivity was observed on increasing the temperature, which is attributed to tunneling and hopping mechanism. With an increase in nanofiller loading, the real part of impedance (Z′) and imaginary part of impedance (Z″) were found to decrease. Further, the semicircular nature of Nyquist plot indicated the decrease in bulk resistivity on increasing GO loading, temperature and incorporating ionic liquid. On the basis of above findings, the obtained GO-Ag-PVA nanocomposite films can find promising applications in charge storage devices.

High barrier graphene oxide nanosheet/poly(vinyl alcohol) nanocomposite films

2012 ◽  
Vol 409-410 ◽  
pp. 156-163 ◽  
Author(s):  
Hua-Dong Huang ◽  
Peng-Gang Ren ◽  
Jun Chen ◽  
Wei-Qin Zhang ◽  
Xu Ji ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Graphene Oxide Nanosheet

Properties of Poly(Vinyl Alcohol)/Chitosan Nanocomposite Films Reinforced with Oil Palm Empty Fruit Bunch Amorphous Lignocellulose Nanofibers

2018 ◽  
Vol 26 (8) ◽  
pp. 3316-3333 ◽  
Author(s):  
Achmad Solikhin ◽  
Yusuf Sudo Hadi ◽  
Muh Yusram Massijaya ◽  
Siti Nikmatin ◽  
Shigehiko Suzuki ◽  
...  
Keyword(s):  
Oil Palm ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Empty Fruit Bunch ◽  
Lignocellulose Nanofibers

Radiation – induced preparation of polyaniline/poly vinyl alcohol nanocomposites and their properties

2019 ◽  
Vol 107 (8) ◽  
pp. 725-735
Author(s):  
Hoda H. Saleh ◽  
Rehab Sokary ◽  
Zakaria I. Ali
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Vinyl Alcohol ◽  
Oxidative Polymerization ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Transmission Electron ◽  
Scanning Electron

Abstract Polyaniline (PANI) nanoparticles and PANI/poly vinyl alcohol (PVA) nanocomposite films were synthesized by the oxidative polymerization of aniline and ammonium peroxodisulfate (APS), as an oxidizing agent in aqueous medium. The PANI/PVA nanocomposite films were exposed to γ-irradiation after oxidative polymerization. Synthesized polyaniline (PANI) nanoparticles and PANI/PVA nanocomposite films were characterized by attenuated total reflectance infrared spectroscopy (FTIR-ATR), X-ray diffraction, high resolution scanning electron microscopy, (HRSEM) high resolution transmission electron microscopy, (HRTEM) and UV-VIS absorption spectroscopy. Energy band gap of PANI nanofibers was determined from Tauc’s plots which equal 4.2 eV. Scanning electron microscopy images show that chemically synthesized of polyaniline has nanofibers structure and irradiated PANI/PVA nanocomposite have a mixture of nanorod and nanosphere structures. The transmission electron microscopy show that chemically synthesized of polyaniline has average length in the range 34 ± 10 nm with less wide distribution, where as the irradiated PANI/PVA nanocomposite has coreshell structure.

Poly(vinyl alcohol) nanocomposite films containing chemically exfoliated molybdenum disulfide

2013 ◽  
Vol 137 (3) ◽  
pp. 764-771 ◽  
Author(s):  
Ketlin Cristine Batista Mancinelli ◽  
Fabio da Silva Lisboa ◽  
Jaisa Fernandes Soares ◽  
Sonia Faria Zawadzki ◽  
Fernando Wypych
Keyword(s):  
Molybdenum Disulfide ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol
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