Optical, mechanical and structural properties of PMMA/SiO<sub>2</sub>nanocomposite thin films

Soni, Gyanesh; Srivastava, Subodh; Soni, Purushottam; Kalotra, Pankaj; Vijay, Y.K.

doi:10.1088/2053-1591/aaa0f7

Cited by 35 publications

(16 citation statements)

References 32 publications

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“…The width of these localize states depends on the heterogeneity of the composites (i.e., the degree of amorphism) . The absorption coefficient, α due to inter‐band transition near the band gap is well described by Tauc relation .

α h ν = B {(|, h ν - E_{g})}^{m}

…”

Section: Resultsmentioning

confidence: 99%

Effects of GNP addition on optical properties and band gap energies of PMMA films

et al. 2018

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In this study, the effects of graphene nanoplatelet (GNP) doping on the optical parameters (absorption coefficient, α and extinction coefficient, k) and the optical transition energies (optical band gap and Urbach energies) of poly(methyl methacrylate)/graphene nanoplatelet (PMMA/GNP) composite films were studied. PMMA/GNP composite films with various GNP mass fractions were prepared by spin coating technique. The absorbance (A) changes of the prepared composites were measured by using UV–Vis technique. The α and k values of the composites were obtained from UV–Vis data. The observed rapid increase in A values in UV‐region were associated with the optical transitions of GNP electrons from valence to conduction band. The direct (Ed) and indirect (Ei) optical band gap energies of the composites were determined by using Tauc method. Both of the band gap energies were decreased when the GNP content in the PMMA matrix is increased. The decrease in the band gap energies was interpreted as evidence of increased conductivity of the composites. Additionally, energies of the band tails (Urbach energy) were calculated. It was seen that the Urbach energy levels were increased with GNP content. POLYM. COMPOS., 40:1862–1869, 2019. © 2018 Society of Plastics Engineers

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α h ν = B {(|, h ν - E_{g})}^{m}

…”

Section: Resultsmentioning

confidence: 99%

Effects of GNP addition on optical properties and band gap energies of PMMA films

et al. 2018

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“…For refractive materials, PMMA (methyl methacrylate) [38,58,63] is the dominant material used most commonly in Fresnel lens systems due to its high transparency and excellent stability in different weather conditions up to 85 °C [64]. Spectral color dispersion in a PMMA…”

Section: Number Of Cells In An Arraymentioning

confidence: 99%

Advances and limitations of increasing solar irradiance for concentrating photovoltaics thermal system

Alzahrani

Shanks

Mallick

2021

Renewable and Sustainable Energy Reviews

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“…Organic surface modification of hydroxylated nanoparticles led to reduced interparticle forces and uniform dispersion in a polymer matrix and accordingly led to higher stability 37 . Various nanoparticles such as those of Mg(OH) 2 , MgO, ZnO, SiO 2 , TiO 2 , etc., have been used based on which property is needed 38–42 for preparing polymer composites and nanocomposites. Among them, magnesium hydroxide nanoparticles (MHN) are extensively used as an eco‐friendly fire retardant and thermally stable material for manufacturing of polymer nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and study of thermal and combustion resistance of DOPO‐functionalized polyamide reinforced with organo‐modified Mg(OH)₂ nanoparticles

Hajibeygi

Habibnejad

Shabanian

et al. 2020

Polymer International

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DOPO‐based dicarboxylic acid (DODA) was synthesized and used to prepare DOPO‐based polyamide (DOPA) using a direct polycondensation reaction. Also, DODA was used for the surface modification of Mg(OH)2 nanoparticles. Polyamide/Mg(OH)2 nanocomposites (DPANC) were prepared based on DOPA and the organically modified Mg(OH)2 nanoparticles through the solvent casting method. Further, to investigate the effect of the DOPO structure on the thermal and combustion properties, a poly(amide‐imine) (PAIm) without the DOPO structure was synthesized. The structure and morphology of the prepared nanocomposites were studied using various techniques. The results indicated that nanoparticles were uniformly dispersed in the polymer matrix. According to thermogravimetric analysis results, the temperature at 10% mass loss was increased from 309 to 337 °C in the DPANC sample containing 8 mass% of nanoparticles as compared to DOPA in inert atmosphere. Further, according to microscale combustion calorimetry results, the peak heat release rate (pHRR) was decreased from 33 to 19 W g−1 in the DPANC 5 sample, as compared to DOPA. Also, the pHRR value of PAIm was obtained as 138 W g−1, which was about 105 W g−1 higher than that of polyamide. © 2020 Society of Industrial Chemistry

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Optical, mechanical and structural properties of PMMA/SiO₂nanocomposite thin films

Cited by 35 publications

References 32 publications

Effects of GNP addition on optical properties and band gap energies of PMMA films

Effects of GNP addition on optical properties and band gap energies of PMMA films

Advances and limitations of increasing solar irradiance for concentrating photovoltaics thermal system

Fabrication and study of thermal and combustion resistance of DOPO‐functionalized polyamide reinforced with organo‐modified Mg(OH)₂ nanoparticles

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Optical, mechanical and structural properties of PMMA/SiO2nanocomposite thin films

Cited by 35 publications

References 32 publications

Effects of GNP addition on optical properties and band gap energies of PMMA films

Effects of GNP addition on optical properties and band gap energies of PMMA films

Advances and limitations of increasing solar irradiance for concentrating photovoltaics thermal system

Fabrication and study of thermal and combustion resistance of DOPO‐functionalized polyamide reinforced with organo‐modified Mg(OH)2 nanoparticles

Contact Info

Product

Resources

About

Optical, mechanical and structural properties of PMMA/SiO₂nanocomposite thin films

Fabrication and study of thermal and combustion resistance of DOPO‐functionalized polyamide reinforced with organo‐modified Mg(OH)₂ nanoparticles