Exploring the physical properties of PVA/PEG polymeric material upon doping with nano gadolinium oxide

Heiba, Zein K.; Mohamed, Mohamed Bakr; Ahmed, Sameh I.

doi:10.1016/j.aej.2021.08.051

Cited by 78 publications

(29 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure I shows the melting endotherm ( T m2 ) for all composite films prepared in the range of 187–195 °C and the decomposition endotherm ( T D ) which is detected at 293 °C for composite films of 2.5 wt % which is comparatively larger than other fillers of different ratio. On addition of MWCNTs into the polymer matrix, the T D values decrease which confirm, the intermolecular interaction between the polymer and fillers. , The TGA curves for blend polymers based pn PVA-PEG + NaNO 3 + x wt % of MWCNTs-based composite electrolytes ( x = 2.5, 5, 7.5, and 10 wt %) are shown in Figure ii(a–d). The TGA curve demonstrates an initial weight loss in the 40–200 °C range.…”

Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

“…On addition of MWCNTs into the polymer matrix, the T D values decrease which confirm, the intermolecular interaction between the polymer and fillers. 73,74 The TGA curves for blend polymers based pn PVA-PEG + NaNO 3 + x wt % of MWCNTs-based composite electrolytes (x = 2.5, 5, 7.5, and 10 wt %) are shown in Figure 5ii(a− blend polymer shows thermal stability 310 °C as reported in Sadiq et al 51 The influence of filler on the polymer blend-salt matrix decreases the thermal stability, which is due to the leading to polymeric backbone because of the disorder the bonding and thermal resistance of the polymers reported in Hirankumar et al 75 The thermal stability of the polymer blend composite electrolytes raises up to above 230 °C for the 7.5 wt % MWCNTs fillers. Consequently, standard polymer electrolyte is thermally more stable as compared with liquid electrolyte and favored when used in portable all solid-state electrochemical energy storage devices.…”

Section: Field Emission Scanning Electron Microscopy (Fesem)mentioning

confidence: 99%

See 2 more Smart Citations

Enhancement of Electrochemical Stability Window and Electrical Properties of CNT-Based PVA–PEG Polymer Blend Composites

et al. 2022

View full text Add to dashboard Cite

New polymer blend composite electrolytes (PBCEs) were prepared by the solution casting technique using poly(vinyl alcohol) (PVA)-polyethylene glycol (PEG), sodium nitrate (NaNO3) as a doping salt and multiwalled carbon nanotubes (MWCNTs) as fillers. The X-ray diffraction pattern confirms the structural properties of the polymer blend composite films. FTIR investigations were carried out to understand the chemical properties and their band assignments. The ionic conductivity of the 10 wt % MWCNTs incorporated PVA-PEG polymer blend was measured as 4.32 × 10–6 S cm–1 at 20 °C and increased to 2.253 × 10–4 S/cm at 100 °C. The dependence of its conductivity on temperature suggests Arrhenius behavior. The equivalent circuit models that represent the R s(Q1(R1(Q2(R2(CR3))))) were used to interpret EIS data. The dielectric behavior of the samples was investigated by utilizing their AC conductance spectra, dielectric permittivity, dielectric constant (εi and εr), electric modulus (Mi and Mr), and loss tangent tan δ. The dielectric permittivity of the samples increases due to electrode polarization effects in low frequency region. The loss tangent’s maxima shift with increasing temperature; hence, the peak height rises in the high frequency region. MWCNTs-based polymer blend composite electrolytes show an enhanced electrochemical stability window (4.0 V), better transference number (0.968), and improved ionic conductivity for use in energy storage device applications.

show abstract

Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Field Emission Scanning Electron Microscopy (Fesem)mentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of Electrochemical Stability Window and Electrical Properties of CNT-Based PVA–PEG Polymer Blend Composites

et al. 2022

View full text Add to dashboard Cite

show abstract

“…На рис. 2 показано різні види електронних переходів, які можуть відбуватися між ВЗ і ЗП, на підставі моделі Тауца [33,34].…”

Section: вступunclassified

Energy Band Gap and the Refractive Index for Polyaniline Thin Films of Polyaniline in Thin Films on Polyethylene Surface

Stetsiv¹,

Yatsyshyn²,

Reshetnyak³

2022

Proc. Shevchenko Sci. Soc. Chem. Sci.

View full text Add to dashboard Cite

e-mail: yuliia.stetsiv@lnu.edu.ua Polyaniline (PAn) films, doped with citric acid, were synthesized on a polyethylene substrate by chemical oxidative polymerization using ammonium peroxydisulfate as an oxidant. The influence of monomer concentration on the optical properties of PAn films was investigated. Optical band gap, absorption coefficient, extinction coefficient, refractive index were calculated as a function of wavelength. Different methods for determining the energy of the energy gap (Tauc method and absorption spectrum fitting) were considered. It was found that the optical band gap for all thin PAn films is due to the direct allowed optical transitions. It was found that the band gap of PAn films decreases with increasing thickness of deposited PAn films. It is established that the optical energies of the band gap of PAn films of different thickness, estimated by the results of optical absorption measurements using Tauc methods and absorption spectrum fitting, are practically commensurate and are in the range of 3.13–2.36 eV for film thicknesses equal to 18.7–137.4 nm, respectively. Based on the correlations between the optical energy of the band gap and the refractive index of semiconductors using Moss, Ravindra, Ravindra-Gupta, Reddy-Ahammed, Gerve-Vandamme, Kumar-Singh, Annani and Duffy-Reddy ratios, the value of the refractive index of PAn films was calculated and these results were compared with the values obtained from the experimental results. From the obtained results it is seen that the refractive index of PAn films increases with increasing polyaniline film thickness on a polyethylene substrate. The values obtained from the Ravindra and Ravindra-Gupta relations are the closest to the experimental ones. Therefore, the synthesized PE/PAn films can be an available material for the production of optoelectronic devices, for example, for organic field transistors and LEDs.

show abstract

“…Among a variety of special features, the simple processing methods and optical characteristics of new compound polymers, create them reliable candidates for different optoelectronic approaches [1].Polymer nanocomposites have been extensively investigated not for their several fields but to understand their physical characteristics. In light of these studies, it was observed that addition of a small ratio of the nanoparticles to the polymer medium improvement considerable characteristics for numerous fields [2].Combining materials of organic polymers and inorganic nanosize opens novel fields for the host polymer [3].The typical advantages of organic polymers materials are flexibility toughness, formability and low density, whereas ceramics materials have good mechanical, optical and thermal characteristics [4].Polymer substances have enthralled scientists due to they are safe, inexpensive, plentiful, and have eco-sustainable characteristics and wide application in scientific and technical investigating [5]. Polyvinyl alcohol (PVA) is one of polymeric substances that have broad variety of fields.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optical properties of PVA/ZrC nanocomposites

Hashim¹,

Hamid²,

Abbas³

et al. 2022

World J. Adv. Res. Rev.

View full text Add to dashboard Cite

In this work, preparation of PVA/ZrC nanostructures and studying the optical properties to employ in different optical fields. The PVA/ZrC nanostructures were fabricated using casting method. The optical properties were measured at wavelength ranged from 200 nm to 800 nm. Results showed that the absorbance(A) of polymer was rise while the transmittance (T) was reduced with rise in the ZrC NPs ratio. The energy gap(Eg) was reduced as the ZrC NPs ratio rises. Also, the results of optical properties indicated that the PVA/ZrC nanocomposites have high absorption at UV region.

show abstract

Exploring the physical properties of PVA/PEG polymeric material upon doping with nano gadolinium oxide

Cited by 78 publications

References 32 publications

Enhancement of Electrochemical Stability Window and Electrical Properties of CNT-Based PVA–PEG Polymer Blend Composites

Enhancement of Electrochemical Stability Window and Electrical Properties of CNT-Based PVA–PEG Polymer Blend Composites

Energy Band Gap and the Refractive Index for Polyaniline Thin Films of Polyaniline in Thin Films on Polyethylene Surface

Synthesis and optical properties of PVA/ZrC nanocomposites

Contact Info

Product

Resources

About