Photodegradation of Polypropylene/ZnO Nanocomposites Films Prepared by Cryomilling under Xenon-arc Radiation

2013 ◽  
Vol 1453 ◽  
Author(s):  
Karen A. Bustos-Torres ◽  
Sofia Vázquez-Rodríguez ◽  
Selene Sepulveda-Guzman ◽  
Alejandra Guzmán-Soto ◽  
Azael Martínez-de la Cruz ◽  
...  
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Compression Molding ◽  
Nanocomposite Films ◽  
Surface Microstructure ◽  
Good Dispersion ◽  
Simulation Chamber ◽  
Solar Simulation

ABSTRACTThe photodegradation of polypropylene (PP)/ZnO composites at different concentrations was evaluated under solar simulated exposure of respective nanocomposite films. Nanocomposites were prepared by solid mixing using a cryogenic mill, and then films were prepared by compression molding. All films showed a good dispersion of ZnO nanoparticles without affect considerably the optical properties of the films. The films were exposed in a solar simulation chamber under three xenon arc lamps with a 340nm filter. Degradation of PP/ZnO nanocomposite films was monitored by formation of oxidative groups and changes on surface microstructure. FTIR results showed that oxidation groups in nanocomposites films increased by using cuasi-spherical ZnO nanoparticles.

Effect of non-annealed and annealed ZnO on the optical properties of PVC/ZnO nanocomposite films

2021 ◽  
pp. 089270572110386
Author(s):  
Ali F Al-Shawabkeh ◽  
Ziad M Elimat ◽  
Khaleel N Abushgair
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Optical Properties ◽  
Zno Nanoparticles ◽  
Oscillator Strengths ◽  
Nanocomposite Films ◽  
Optical Parameters ◽  
Zno Nanoparticle ◽  
Dispersion Energy ◽  
Optical Susceptibility

The goal of this study was to investigate the optical properties of the prepared polyvinyl chloride (PVC)/zinc oxide (ZnO) nanocomposite films. The PVC/ZnO nanocomposite films consist of the addition of different concentrations with both non-annealed ZnO nanoparticles and ZnO nanoparticles annealed at temperature of 700°C. The PVC/ZnO nanocomposite films by weight concentrations of (0 wt.%, 2.5 wt.%, 5 wt.% and 10 wt.%) have been prepared by the casting method. The optical absorbance and transmittance values of the composites films were measured in the wavelength range between (250 to 1100 nm) at room temperature by using the UV-1800 Shimadzu spectrophotometer. The optical properties (absorption coefficient, dielectric constant, refractive index, and optical conductivity) have been investigated by the ultraviolet (UV) spectrophotometer. The optical parameters (direct optical energy gap, excitation energy for electronic transitions, the dispersion energy, static refractive index, static dielectric constant, optical oscillator strengths, the moments of optical spectrum, linear optical susceptibility, third-order nonlinear optical susceptibility, nonlinear refractive index, high-frequency dielectric constant, the carrier concentration to the effective mass ratio, the long wavelength refractive index and the plasma frequency) were calculated. The results showed that the optical properties behavior of the PVC/ZnO nanocomposite films was found to be dependent on the ZnO concentration, and photon wavelength. In addition, the results of the study show that the optical parameters can be influenced by alter the concentration of the nonannealed and annealed a ZnO nanoparticle in the PVC polymer matrix.

Optical Properties of Stabilized ZnO Nanoparticles, Perspective for UV-Protection in Sunscreens

2015 ◽  
Vol 11 (3) ◽  
pp. 354-359 ◽  
Author(s):  
S.I. Senatova ◽  
A.R. Mandal ◽  
F.S. Senatov ◽  
N. Anisimova ◽  
S.E. Kondakov ◽  
...  
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Uv Protection

scholarly journals Synthesis and Optical Properties of B-Mg co-Doped ZnO Nanoparticles

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 882
Author(s):  
Yuechan Li ◽  
Yongli Li ◽  
An Xie
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Great Influence ◽  
Structure Study ◽  
Band Gap Energy ◽  
One Pot ◽  
Gap Energy ◽  
Doping Impurity ◽  
Shrinkage Effect ◽  
Co Doped

Doping impurity into ZnO is an effective and powerful technique to tailor structures and enhance its optical properties. In this work, Zn1−xMgxO and Zn1−x−yMgxByO nanoparticles (x = 0, 0.1, 0.2, 0.3, 0.4; y = 0, 0.02, 0.04) were synthesized via one-pot method. It shows that the Mg and B dopants has great influence on crystallinity and surface morphology of ZnO nanoparticles, without changing the wurtzite structure of ZnO. The band structure study indicates that the competition of Conductive Band (CB) shift, Burstein–Moss (B-M) shift and Shrinkage effect will cause the band gap energy change in ZnO.

Effect of gamma radiation on the structural, thermal and optical properties of PMMA/Sn0.75Fe0.25S2 nanocomposite

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali A. Alhazime ◽  
Nesreen T. El-Shamy ◽  
Kaoutar Benthami ◽  
Mai ME. Barakat ◽  
Samir A. Nouh
Keyword(s):  
Thermal Stability ◽  
Optical Properties ◽  
Gamma Irradiation ◽  
Optical Band Gap ◽  
Color Variation ◽  
Nanocomposite Films ◽  
Color Changes ◽  
Gamma Irradiated ◽  
Intermolecular Crosslinking ◽  
Amorphous Part

AbstractNanocomposite films of polymethylmethacrylate PMMA with Sn0.75Fe0.25S2 nanoparticles (NPs) were fabricated by both thermolysis and casting techniques. Changes in PMMA/Sn0.75Fe0.25S2 nanocomposite (NCP) due to gamma irradiation have been measured. XRD results indicate that the gamma doses of 10–80 kGy cause intermolecular crosslinking that reduces the ordered portion in the NPs. Bonding between the NPs and the host PMMA was confirmed by FTIR. TGA results indicate an enhancement in thermal stability in the NCP films irradiated with doses 20–80 kGy. The optical band gap was reduced from 3.23 to 2.47 eV upon gamma irradiation up to 80 kGy due bonding between the NPs and PMMA which enhanced the amorphous part of the NPs. Finally, the color variation between the blank and irradiated films (ΔE) was determined. Color changes immensely when the PMMA/Sn0.75Fe0.25S2 NCP films are gamma irradiated. Values of ΔE were as much as 31.6 which is an acceptable match in commercial reproduction on printing presses.

ZnO Nanoparticles, Nanorods, Hexagonal Plates and Nanosheets Produced by Polyol Route and the Effect of Surface Passivation by Acetate Molecules on Optical Properties

2019 ◽  
Vol 48 (10) ◽  
pp. 6437-6445
Author(s):  
Eduardo F. Barbosa ◽  
Jaqueline A. Coelho ◽  
Edna R. Spada ◽  
Daniel R. B. Amorim ◽  
Livia M. C. Souza ◽  
...  
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Surface Passivation ◽  
Effect Of Surface

scholarly journals The influence of calcination temperature on optical properties of ZnO nanoparticles

2019 ◽  
Author(s):  
Iwan Sugihartono ◽  
Atika Retnoningtyas ◽  
Cecep Rustana ◽  
Umiatin ◽  
Nurfina Yudasari ◽  
...  
Keyword(s):  
Optical Properties ◽  
Calcination Temperature ◽  
Zno Nanoparticles

Optical properties of diamond like carbon and diamond like nanocomposite films

2009 ◽  
Vol 6 (12) ◽  
pp. 2817-2819
Author(s):  
Asta TamulevicÌŒienė ◽  
SÌŒaruÌ„nas MesÌŒkinis ◽  
Vitoldas Kopustinskas ◽  
Sigitas TamulevicÌŒius
Keyword(s):  
Optical Properties ◽  
Nanocomposite Films ◽  
Diamond Like Carbon
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