Synthesis, Structural, Optical, Electrical and Thermal Studies of Poly(vinyl alcohol)/CdO Nanocomposite Films

Selvi, J.; Mahalakshmi, S.; Parthasarathy, V.

doi:10.1007/s10904-017-0662-1

Cited by 41 publications

(26 citation statements)

References 36 publications

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“…a. A broad peak is centered at 19.8 ° in the XRD pattern of pure PVA . It is associated with (101) crystal plane of PVA, which arises mainly due to the semi‐crystalline nature of PVA.…”

Section: Resultssupporting

confidence: 52%

“…The optical properties of the prepared samples were examined using UV‐1800 Shimadzu automatic recording double beam spectrophotometer in the wavelength range of 200–800 nm. The UV–Vis absorption spectra were used to calculate the bandgap ( E g ) of the nanoparticles as well as the composite films by using Tauc mathematical relation :

italicαhυ = A {(hυ - E_{normalg})}^{n}

where, α and hγ are the absorption coefficient and energy of photon respectively, the exponent n will take the values of 1/2, 3/2, 2, and 3 which depends on the type of transition. The dc conductivity measurement was performed by a standard four probe Keithley 617 programmable instrument at room temperature for all the composite films.…”

Section: Methodsmentioning

confidence: 99%

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Optical, thermal, mechanical properties, and non‐isothermal degradation kinetic studies on PVA/CuO nanocomposites

Selvi

Mahalakshmi²,

Parthasarathy

et al. 2019

Polymer Composites

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The CuO nanoparticle doped poly(vinyl alcohol) (PVA) nanocomposite films were prepared by the solution casting method. The structure of the prepared CuO nanoparticles and PVA nanocomposite films were confirmed by FTIR spectroscopy and XRD. The (101) crystal plane of PVA was observed at 19.8 in XRD. The size of the CuO nanoparticles was determined as 20 nm using Scherrer's formula. It was further confirmed with HRTEM. The surface morphology of the nanocomposite films was investigated using SEM. The optical properties of the prepared CuO nanoparticles and PVA nanocomposite films were analyzed by UV-Visible spectroscopy. The band gap of PVA was decreased after the incorporation of CuO in PVA. The thermal stability of the pure PVA and its nanocomposites was examined using TGA to assess their thermal degradation temperature at five different heating rates. The thermal stability of PVA nanocomposites was increased as compared with pure PVA. The non-isothermal degradation kinetic studies were also carried out to determine the energy of activation (E a ) for the degradation process using four different kinetic models. The tensile strength and Young's modulus of PVA nanocomposite films were notably increased with the increasing concentration of CuO nanoparticles. POLYM. COMPOS., 40:3737-3748, 2019. POLYMER COMPOSITES-2019 FIG. 4. HRTEM image of (a) CuO nanoparticles, (b) SAED pattern of CuO, and (c) HRTEM image of 6 wt% CuO loaded PVA nanocomposites system. [Color figure can be viewed at wileyonlinelibrary.com]

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“…a. A broad peak is centered at 19.8 ° in the XRD pattern of pure PVA . It is associated with (101) crystal plane of PVA, which arises mainly due to the semi‐crystalline nature of PVA.…”

Section: Resultssupporting

confidence: 52%

italicαhυ = A {(hυ - E_{normalg})}^{n}

Section: Methodsmentioning

confidence: 99%

Optical, thermal, mechanical properties, and non‐isothermal degradation kinetic studies on PVA/CuO nanocomposites

Selvi

Mahalakshmi²,

Parthasarathy

et al. 2019

Polymer Composites

Self Cite

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“…The light absorption and transmittance behavior of the samples were investigated in the wavelength range of 200 nm to 800 nm. The optical bandgap values (E g ) of the prepared SrO nanofillers and SrO nanofillers embedded PVA nanocomposite films were estimated using Tauc's mathematical relation:

αhν = normalA {(hν - {normalE}_{normalg})}^{n}

where hγ is the photon energy, α represents the absorption coefficient, and an exponent n takes different values (1/2, 3/2, 2, and 3) according to the type of transition. The morphological observation was carried out using Hitachi S‐3700 N SEM, Japan for all the prepared samples.…”

Section: Methodsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Enhancement in thermal, mechanical and electrical properties of novel PVA nanocomposite embedded with SrO nanofillers and the analysis of its thermal degradation behavior by nonisothermal approach

Selvi

Parthasarathy

Mahalakshmi³

et al. 2019

Polymer Composites

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Effect of SrO nanofillers on the physical and chemical properties of newly prepared PVA nanocomposites was investigated in‐depth in this article. The structure of SrO nanopowder and PVA nanocomposites were analyzed using FTIR for surface chemistry and XRD for crystallographic nature. The extent of dispersion and particle size of SrO nanopowders were obtained from TEM micrographs. The average particle size of the SrO nanopowder was 57 nm. The uniformly dispersed SrO nanofillers in the host PVA matrix were observed from the TEM micrographs. The prepared PVA nanocomposites displayed a high absorption in the UV region. The thermal stability of PVA nanocomposites was enhanced after the addition of SrO nanofillers. The nonisothermal degradation study was carried out using different kinetic models for the prepared PVA nanocomposites. The Young's modulus (Y) and tensile strength of the PVA nanocomposites were higher than that of the pristine PVA. The DC conductivity of PVA was also increased when the PVA was embedded with the SrO nanoparticles. Highlights The novel PVA nanocomposites embedded with SrO nanofillers were prepared by the solution casting method. The band gap of PVA was decreased gradually while increasing the concentration of SrO nanofillers. The thermal degradation of polymer composites was studied under nonisothermal heating using several kinetic models. The thermal stability of PVA was enhanced after the addition of SrO nanofillers. The electrical and mechanical Properties of PVA nanocomposites were also improved.

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“…The influence on thermal stability of polymers by addition of CdO nanoparticles in polymer matrix has been earlier reported by researchers. Thermal stability of poly vinyl alcohol (PVA) increased by doping of CdO nanoparticles [18]. CdO/ Polyaniline (PANI) nanocomposites are more thermal stable than the PANI polymer [19].…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Microwave Assisted Approach: Synthesis of CdO/Polyacrylonitrile and CdO/ Poly(Butyl Methacrylate) Nanocomposites and Their Thermal Studies

Kumar¹,

Shankar²

2019

JNST

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CdO nanoparticles, polyacrylonitrile, poly(butyl methacrylate) polymers have been synthesized by using green chemistry approach. Thereafter synthesized polymers were fabricated into nanocomposites by mixing nanoparticles to the polymers again using green chemistry protocol. Formation of CdO nanoparticles was confirmed by FT-IR and UV-Visible spectral data. The sizes of nanoparticles were determined by P-XRD and TEM analysis. P-XRD and TEM images of nanoparticles indicated that size of most of the nanoparticles lies in the range 5.74-22.25 nm. Formation of polymers and nanocomposites was confirmed by IR spectral studies. Morphology of nanocomposites was determined by SEM analysis. The thermal stability of polymers and nanocomposites was determined by TGA/DTA and found that the thermal stability of CdO/PAN & CdO/PBMA nanocomposites increased as compared to their polymers.

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Synthesis, Structural, Optical, Electrical and Thermal Studies of Poly(vinyl alcohol)/CdO Nanocomposite Films

Cited by 41 publications

References 36 publications

Optical, thermal, mechanical properties, and non‐isothermal degradation kinetic studies on PVA/CuO nanocomposites

Optical, thermal, mechanical properties, and non‐isothermal degradation kinetic studies on PVA/CuO nanocomposites

Enhancement in thermal, mechanical and electrical properties of novel PVA nanocomposite embedded with SrO nanofillers and the analysis of its thermal degradation behavior by nonisothermal approach

Eco-Friendly Microwave Assisted Approach: Synthesis of CdO/Polyacrylonitrile and CdO/ Poly(Butyl Methacrylate) Nanocomposites and Their Thermal Studies

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