Abstract
In this study, fly ash (FA) and multiwalled carbon nanotubes (MWCNTs) were used to make environmentally friendly nanocomposites, which have high fire retardant properties and high mechanical properties. Industrial waste such as fly ash has become a major concern during the treatment of environmental pollution. MWCNTs were used in this experiment to enhance the flame retardant properties and mechanical properties of materials with fly ash additives. MWCNTs content (0.03, 0.04, and 0.05 wt.%) and fly ash content (30, 40, and 50 wt.%) were studied for three different levels. The flame retardancy of the material is significantly improved by the addition of fly ash/MWCNTs at different rates, especially at 0.04 wt. % MWCNTs and 40 wt. % fly ash with LOI at 26.8%. Regarding mechanical properties, tensile strength increases as fly ash/MWCNTs increase, up to a critical point. On the other hand, the compressive strength of composite increases continuously as fly ash/MWCNTs increase. Scanning electron microscopy (SEM) was used to observe the morphology of fly ash and MWCNTs as well as its distribution in the matrix. This will help analyze the influence of the effectiveness of the combination of fly ash and MWCNTs to the flame retardancy and mechanical properties of fly ash/MWCNTs/epoxy nanocomposites.
Highlights
Epoxy resins have high adhesion characteristics with many reinforcements, good chemical resistance and corrosion resistance, and superior electrical properties; they are widely used in various industrial fields such as coatings, bearing structures, adhesives, and composite materials
Sroka et al studied fly ash denaturation by [3- (2aminoethylamino) propyl] trimethoxysilane. e results show that the mechanical properties have been significantly improved compared to the unmodified fly ash. e work has demonstrated the use of modified fly ash as an additive to make epoxy composite materials that can be applied in the field of civil electricity [4]
The results show that tensile strength, flexural strength, and impact strength tend to decrease as fly ash content increases while compressive strength increases
Summary
Epoxy resins have high adhesion characteristics with many reinforcements, good chemical resistance and corrosion resistance, and superior electrical properties; they are widely used in various industrial fields such as coatings, bearing structures, adhesives, and composite materials. Research on the effect of fly ash on the mechanical properties of epoxy composites shows that increasing the mass of fly ash results in reduced tensile strength and increased flexural and compressive strength [5]. The recent studies published by scientists are about the use of fly ash in manufacturing materials with high fire resistance and, at the same time, the mechanical properties remain stable; the content of fly ash used for the study was 5, 10, and 20 wt.% [6]. Is is the study on flame retardant properties and mechanical properties of epoxy nanocomposites materials in the presence of fly ash additives and reinforced by MWCNTs. During the study of using fly ash additives to make composites, some mechanical strength was reduced, this research sought to overcome the above limitation by adding nanoadditives, namely, MWCNTs
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