Dielectric investigation of high density polyethylene loaded by ZnO nanoparticles synthesized by sol–gel route

Mansour, Shehab A.; Elsad, R. A.; Izzularab, Mohamed A.

doi:10.1007/s10971-016-4109-x

Cited by 34 publications

(7 citation statements)

References 42 publications

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“…The C=O two asymmetric and symmetric stretching bands at 1430 and 1640 cm −1 are resulting from the zinc acetate in the samples. The absorption band that appears at about 440 cm −1 can be assigned to the ZnO stretching modes [ 36 ]. The ZnO stretching mode is showing small changes which is reflecting on the unpronounced changes seen in the volumes of ZnO cell.…”

Section: Resultsmentioning

confidence: 99%

Ga-Doped ZnO Nanostructured Powder for Cool-Nanopigment in Environment Applications

2020

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Gallium (Ga) doped zinc oxide (ZnO) nanocrystals were successfully synthesized via a γ-radiation-assisted polymer-pyrolysis route. Ga doped ZnO samples with Ga and ZnO precursor salts with molar ratios of 0%, 3%, 5%, and 10% were produced. A γ-radiation dosage of 1.5 kGy was used for polymerization initiation during the sample preparation. The properties of the obtained nanocrystal samples were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR), UV-visible absorption, NIR-VIS-UV diffused reflectance, and high-resolution transmission electron microscopy (HR-TEM) characterization techniques. XRD results revealed the formation of ZnO nanocrystals with wurtzite structure for both Ga-doped and undoped ZnO samples. Noticeable increasing in the line broadening of the XRD peaks as well as pronounced decreasing of crystallite size were observed with the increasing Ga ratio in the samples. Optical peaks around Ga:ZnO samples showed a blueshift in the optical absorption peaks with increasing Ga content. These results are in good agreement with the dependency of crystallites size as well as grain size on Ga ratio obtained from XRD and TEM images, which make them fit well for the powder cool-pigment applications. The doped samples showed high values of NIR reflectance (RNIR*) with percentage varied from 84.25% to 89.05% that enabled them to qualify for cool-nanopigment applications. Furthermore, such doped samples registered low values of visible reflectance (RVIS*) that enabled to reduce the glare from the reflected visible sunlight.

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Section: Resultsmentioning

confidence: 99%

Ga-Doped ZnO Nanostructured Powder for Cool-Nanopigment in Environment Applications

2020

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“…Improvement in DBS could be explained by the effect of interaction zones . When the filler is added to the matrix, the surface area of particles increase and the interfacial area increase leading to high volume of interaction zones.…”

Section: Resultsmentioning

confidence: 99%

“…It is fundamentally influenced by cohesive energy density and the free volume or mobility of the polymer . Researcher reported that an enhancement in DBS of composites by applying ZnO/HDPE composites and OMMT/LLDPE nanocomposites . A good insulation should have high flame retardancy to minimize the damage during combustion.…”

Section: Introductionmentioning

confidence: 99%

Properties of nanofillers/crosslinked polyethylene composites for cable insulation

Lim

Mariatti

Jamil

et al. 2018

Vinyl Additive Technology

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In this work, we report the effect of nanofillers and filler loading on mechanical, physical, dielectric, and thermal properties of the crosslinked polyethylene (XLPE) matrix. XLPE filled with 0.5-2% of zinc oxide (ZnO), aluminium oxide (Al 2 O 3 ), and organoclay (OMMT) nanofillers prepared by melt mixing with a single screw extruder followed by hot press moulding. Nanocomposites were tested as per ASTM standard methods and characterized with tensile test, water absorption, linear rate of burning, dielectric breakdown strength, and thermal stability. Scanning electron microscopy (SEM) was used to examine the surface morphology of the nanocomposites. The results showed that addition of nanofillers improved tensile strength, elongation at break, Young's modulus, burning rate, dielectric breakdown strength, and decomposition temperature. However, water absorption increased with time due to the hydrophilic properties of nanofillers. In general, based on the properties measured Al 2 O 3 exhibits the highest properties than those of ZnO and OMMT nanofillers. Addition of 1.5% of Al 2 O 3 in XLPE matrix has led to the improvement in tensile strength, elongation at break, Young's modulus, burning rate, and dielectric breakdown strength as compared to the unfilled polymer. J. VINYL ADDIT. TECHNOL., 25: E147-E154, 2019.

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“…The samples were labeled according to 0, 0.5, 0.7, 1.0, and 3.0 wt% percentages, as PS0, PS0.5, PS0.7, PS1.0 and PS3.0, respectively. ZnO nanocrystals were obtained after calcination that was done at 600 °C for 6 h, The structure of the obtained final product of ZnO nanopowders was examined and confirmed by X-ray diffraction (XRD) using -ray diffractometer (PANalytical X’Pert PRO MRD X with Cu Kα radiation source (PANalytical Inc., MA, USA), field emission scanning electron microscope and Fourier transform infrared (FTIR) according to a previous study [ 8 ]. The thermogravimetry (TG) analysis for pure PS and the PS/ZnO nanocomposite films were carried out using a Shimadzu TGA-50H instrument.…”

Section: Methodsmentioning

confidence: 99%

“…Several properties of the polymers have been tuned by proper type and/or amount of nanoparticles that were used as polymers fillers. The incorporation of the inorganic nanomaterials such as ZnO nanoparticles into the organic polymer matrix resulted in polymer/ZnO nanocomposites that had excellent magnetic, mechanical and high thermal stability properties [ 5 , 8 , 9 , 10 ]. Enhancing the thermal stability of the nanocomposites is a crucial aspect for many of their industrial applications [ 7 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Degradation of Polystyrene (PS) Nanocomposites Loaded with Sol Gel-Synthesized ZnO Nanorods

2020

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Thermal degradation of polystyrene/ZnO (PS/ZnO) nanocomposites was investigated in this study. PS/ZnO polymer nanocomposites were prepared by using ZnO nanorods as nanofillers that were prepared via the sol-gel route. The as-prepared ZnO nanoparticles showed nanocrystallites in rod-like shapes with a non-uniform hexagonal cross-section and diameter varying from 40 to 75 nm. PS/ZnO nanocomposites with ZnO nanoparticles content ranging from 0–3 wt% are prepared via the common casting method. Even dispersion for ZnO nanoparticles within as-prepared PS/ZnO nanocomposites was verified through SEM/EDX measurements. Thermal degradation of the samples was checked by using the thermogravimetric (TG) analysis and differential scanning calorimetry (DSC) under non-isothermal conditions and a constant heating rate of 10 °C min. The thermal stability of the nanocomposite is elevated compared to that of pristine PS due to the addition of the ZnO nanoparticles. The homogeneity of the PS/ZnO nanocomposites is verified by systematic increases in thermal degradation with increasing ZnO content. The characterization degradation temperatures at different weight loss percentages of ZnO nanoparticles increase at high ZnO wt%. Static activation energy of decomposing is based on TGA data. Activation energies showed some enhancement after the addition of ZnO nanorods into the PS matrix. Enhancing the thermal stability of PS with ZnO addition within the investigated ZnO concentration range is verified by TG, DSC results.

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Dielectric investigation of high density polyethylene loaded by ZnO nanoparticles synthesized by sol–gel route

Cited by 34 publications

References 42 publications

Ga-Doped ZnO Nanostructured Powder for Cool-Nanopigment in Environment Applications

Ga-Doped ZnO Nanostructured Powder for Cool-Nanopigment in Environment Applications

Properties of nanofillers/crosslinked polyethylene composites for cable insulation

Thermal Degradation of Polystyrene (PS) Nanocomposites Loaded with Sol Gel-Synthesized ZnO Nanorods

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