Influence of microwave irradiation on thermal properties of PVA and PVA/graphene nanocomposites

2019 ◽  
Vol 139 (1) ◽  
pp. 353-365 ◽  
Author(s):  
Hafiz Muhammad Afzal ◽  
Farrukh Shehzad ◽  
Mukarram Zubair ◽  
Omer Yahya Bakather ◽  
Mamdouh A. Al-Harthi
Keyword(s):  
Thermal Properties ◽  
Microwave Irradiation ◽  
Graphene Nanocomposites

scholarly journals Enhanced electrochemical performance of α-MoO3/graphene nanocomposites prepared by an in situ microwave irradiation technique for energy storage applications

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22836-22847
Author(s):  
P. Nagaraju ◽  
M. Arivanandhan ◽  
A. Alsalme ◽  
A. Alghamdi ◽  
R. Jayavel
Keyword(s):  
Energy Storage ◽  
Microwave Irradiation ◽  
Electrochemical Performance ◽  
Graphene Sheets ◽  
Microwave Irradiation Method ◽  
Graphene Nanocomposites ◽  
One Step ◽  
Energy Storage Applications ◽  
Enhanced Electrochemical Performance

Nanoparticles of α-molybdenum oxide (α-MoO3) are directly grown on graphene sheets using a surfactant-free facile one step ultrafast in situ microwave irradiation method.

On Mechanical and Thermal Properties of Epoxy/Graphene Nanocomposites

2018 ◽  
Vol 22 ◽  
pp. 23-33 ◽  
Author(s):  
Seenaa I. Hussein
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Impact Strength ◽  
Mechanical And Thermal Properties ◽  
Graphene Nanocomposites ◽  
Graphene Composite ◽  
Efficiency Increase ◽  
Graphene Content ◽  
The Impact ◽  
Thermal Stability Of

In this research, we have prepared epoxy/graphene nanocomposites (graphene content: 1, 3, 5, 7, and 9 wt%) to investigate some mechanical (impact strength, hardness, and Brazilian tests) and thermal properties (thermal conductivity and thermogravimetric analysis). Our results show that the impact strength, hardness, and compression strength values increased to 5.04 kJ/m2, 79.8, and 27.85 MPa, respectively, as increasing graphene content up to 5 wt% and then decreased for further increasing of the graphene content. The observed reduction in the hardness could be attributed to the samples brittleness. On the other hand, the thermal conductivity increased with increasing the graphene content because of the high thermal conductivity of graphene and thus the efficiency increase with increasing of graphene content. In addition, the thermal stability of epoxy/graphene composite increase compared with pure epoxy resin, while the activation energy for samples consists of 9 wt% graphene greater than those containing 1 wt% graphene.

The influence of microwave irradiation on thermal properties of main rock-forming minerals

2017 ◽  
Vol 112 ◽  
pp. 1523-1532 ◽  
Author(s):  
Gao-ming Lu ◽  
Yuan-hui Li ◽  
Ferri Hassani ◽  
Xiwei Zhang
Keyword(s):  
Thermal Properties ◽  
Microwave Irradiation

scholarly journals Mn3O4/graphene nanocomposites: outstanding performances as highly efficient photocatalysts and microwave absorbers

RSC Advances ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 826-839 ◽  
Author(s):  
Ahmed A. Amer ◽  
S. M. Reda ◽  
M. A. Mousa ◽  
Mohamed Mokhtar Mohamed
Keyword(s):  
Methylene Blue ◽  
Microwave Irradiation ◽  
Solvothermal Process ◽  
Methylene Blue Degradation ◽  
Microwave Absorbers ◽  
Graphene Nanocomposites ◽  
Highly Efficient

Mn3O4 incorporated graphenes synthesized by a deposition-solvothermal process were efficiently used for methylene blue degradation under visible illumination (88 W, λ > 420 nm) and under microwave irradiation (800 W, 2.45 GHz, 373 K).

scholarly journals Functionalised graphene effect on the mechanical and thermal properties of recycled PA6/PA6,6 blends

2021 ◽  
pp. 002199832098789
Author(s):  
Feras Korkees ◽  
Abdullah Aldrees ◽  
Imad Barsoum ◽  
Dalal Alshammari
Keyword(s):  
Thermal Properties ◽  
Extrusion Process ◽  
Advanced Materials ◽  
Slight Variation ◽  
Mechanical And Thermal Properties ◽  
Segmental Motion ◽  
Graphene Nanocomposites ◽  
New Class ◽  
Graphene Nanoparticles ◽  
Hot Melt

Limiting the generation of polymers waste and maximizing their recyclability and recovery have been the main focus of the research and industry in recent years. Recycling of polyamides leads to the loss in mechanical and thermal properties, therefore, in order to reuse recycled nylons, an enhancement in their properties is desired. Enhancing the properties of recycled polyamides by the addition of functionalised graphene nanoparticles (GNPs) was the goal of this study. Recycled PA6/PA6,6 blends and functionalised graphene nanocomposites were prepared using hot-melt extrusion process. Two types of functionalised graphene were used: O2-GNPs and Amine-GNPs. The nanofillers didn’t affect the crystallinity of the recycled nylon, while the presence of functionalised graphene increased the thermal conductivity by enabling better heat transfer routes within the polymer. The microstructure of the materials was characterised confirming the successful dispersion but with a slight variation in GNPs/Polymer bonding depending on the functionalisation type. The strong nylon-to-graphene interfacial hydrogen bonding increased the mechanical properties of the recycled nylon nanocomposites. The functionalised nanoparticles slowed down the segmental motion of the polymer chain and decreased the ductility with increasing GNPs contents up to 10 wt%. The overall behaviour of recycled nylon nanocomposites showed dependency on the type of functionalisation and concentration of GNPs with better improvement in the overall properties using 2 wt% Amine-GNPs. These enhanced properties make functionalised graphene/recycled nylon nanocomposites a promising new class of advanced materials.

scholarly journals Synthesis and Mechanical Characterization of High Density Polyethylene/Graphene Nanocomposites

2018 ◽  
Vol 8 (2) ◽  
pp. 2814-2817 ◽  
Author(s):  
A. S. Alghamdi
Keyword(s):  
Tensile Strength ◽  
Thermal Properties ◽  
Elastic Modulus ◽  
High Density Polyethylene ◽  
Graphene Nanosheets ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Micro Hardness ◽  
Polyethylene Matrix ◽  
Graphene Nanocomposites

The purpose of this work is to investigate the effects of graphene nanosheets (GNSs) addition on the mechanical and thermal properties of high density polyethylene (HDPE). The HDPE/Graphene nanocomposites were synthesized using solution blending approach. HDPE was incorporated with graphene nanosheets in a solvent at various weights of fractions (0.1, 0.2, 0.4 and 0.5 wt%), and then the micro-hardness, elastic modulus, tensile strength, strain at break and thermal properties of the nanocomposites were measured and compared. The results showed that the use of Xylene solvent at high temperature combined with mechanical stirring can fully dissolve HDPE pellets. Scanning electron microscope (SEM) showed that GNSs were homogenously dispersed in the polyethylene matrix at low weights of fractions. The addition of just 0.2 wt% GNSs resulted in 100% increase in the micro-hardness value. The elastic modulus and tensile strength properties are proportionally increased with increasing GNSs content up to 0.4 wt%. However, at higher weight of fraction, a reduction in these properties is observed. The crystallinity and strain at break properties are reduced with the addition of GNSs.

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