Enhancement of fexural modulus and strength of epoxy nanocomposites with the inclusion of functionalized GNPs using Tween 80

Wan Ab Halim, Wan Zateel Aqmaer and Junid, Ramli Junid and Sazali, Norazliane and Siregar, Januar Parlaungan and Abd Razak, Jeeferie and Fitriyana, Deni Fajar and Cionita, Tezara and Jaafar, Jamiluddin (2024) Enhancement of fexural modulus and strength of epoxy nanocomposites with the inclusion of functionalized GNPs using Tween 80. Journal of Engineering and Applied Science, 71 (69). pp. 1-14.

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Abstract

In this work, epoxy nanocomposite was prepared with the inclusion of unfunctionalized as-received GNPs (ARGNPs) and functionalized GNPs using surfactant Tween 80 (T80GNPs) in the epoxy resin using a mechanical stirrer. ARGNPs were used as it is, while T80GNPs were prepared through the adsorption of surfactant onto GNPs’ surface using a sonication procedure in an ultrasonic bath. Characterization of nanoparticles using SEM shows that ARGNPs indicated a softer image representing a thinner layer of graphene stacks compared to T80GNP which has a tangible solid-looking image resulting from the sedimentation during the process of fltration. Elementally, both ARGNPs and T80GNPs were found to contain carbon, oxygen, and sulfur, as indicated by the EDX spectrum, with the C/O ratio for T80GNPs being 34.7% higher than that for ARGNPs, suggesting the adsorption of Tween 80 molecules on the GNPs after functionalization. FTIR spectroscopy confrms the attachment of Tween 80 molecules on GNPs surface with T80GNPs spectrum indicated higher peak intensity than ARGNPs. Flexural testing demonstrated that the addition of 0.9 wt.% ARGNPs and 0.9 wt.% T80GNPs to the epoxy increased the modulus of the nanocomposites to 72.1% and 82.6%, respectively, relative to neat epoxy. With the same amount of particle content, both nanocomposites showed increased strength, with ARGNPs and T80GNPs exhibiting strengths of 70.5% and 87.8%, respectively, relative to neat epoxy.

Item Type:	Article
Uncontrolled Keywords:	Graphene, Functionalization, Epoxy nanocomposites, Flexural modulus, Flexural strength
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Mechanical and Manufacturing Engineering > FKMP
Depositing User:	Mr. Mohamad Zulkhibri Rahmad
Date Deposited:	23 Dec 2024 01:25
Last Modified:	23 Dec 2024 01:26
URI:	http://eprints.uthm.edu.my/id/eprint/11915

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