Abstract
Modern flame retardants are organic compounds containing halogen or phosphorus groups and are not always well dispersed in polymers. Thus, by using a small amount of nanoclay and multiwalled carbon nanotubes (MWCNTs), they can significantly reduce the number of conventional flame retardant additives, making the material with optimal flame retardant properties. Conventional flame retardants always have some negative effects on the mechanical properties of the polymer substrate, so by using nanoclay and MWCNTs, those adverse effects can be minimized and overcome. In this work, in order to improve the mechanical properties and flame retardant of nanocomposite materials, nanoclay I.30E and MWCNTs are mixed into epoxy, with the selected percentage of 2% and 0.02% by weight, respectively, stirring mechanically for 7, 8, and 9 hours at 3000 rpm at 80°C, then performing ultrasonic vibration for 6 hours at 65°C.
Highlights
Multiwalled carbon nanotubes tend to aggregate into bundles in solvents or in plastic if dispersion techniques are not reasonable
The results showed that when the ultrasonic stirring time was increased, there was an increase in the initial value in tensile strength, and there was a decrease in value at longer ultrasonic stirring time, despite using the ultrasonic stir method combined with mechanical stir to disperse multiwalled carbon nanotubes (MWCNTs) into epoxy
Disperse 0.02% by weight of MWCNTs into E 240 epoxy resin by mechanical mixing method combined with ultrasonic vibration
Summary
Multiwalled carbon nanotubes tend to aggregate into bundles in solvents or in plastic if dispersion techniques are not reasonable. Montazeri and Chitsazzadeh [4] studied the effect of ultrasonic parameters on the mechanical properties of composite MWCNTs/epoxy materials. The authors studied the effects of time and the power of ultrasonic stir to disperse 0.5% by weight of MWNTs in epoxy. Recent research on the combined effect of organic clay minerals multiwalled carbon nanotubes into the system shows that the presence of organic clay minerals has increased the mechanical properties and flame retardant of polymers [9, 10]. Regarding the effect of MWCNTs and nanoclay on the mechanical properties of epoxy composite nanomaterials, the results showed that with 3% of nanoclay mass combined with 1% mass of MWCNTs, the mechanical properties were significantly improved [11].
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