Bandeira de Souza, Ziani Santana, Araújo do Nascimento, Pedro Lucas, Samara, Mazen, David, Éric, Macedo Fechine, Guilhermino Jose, Alves da Motta Sobrinho, Mauricio et Demarquette, Nicole Raymonde.
2025.
« Influence of graphene functionalization on the curing kinetics, dynamical mechanical properties and morphology of epoxy nanocomposites ».
Polymer, vol. 320.
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Résumé
The properties of graphene have made it a promising material for the development of polymer nanocomposites, and graphene functionalization has gained popularity due to its ability to improve dispersion between the phases. For thermosetting matrices, nanomaterials can affect curing, and rheological studies provide crucial information about this process. This study was undertaken to investigate the impact of graphene functionalization on the curing kinetics and morphology of epoxy nanocomposites. For that, graphene (G), graphene functionalized with surfactant sodium dodecyl sulfate (G-SDS), graphene oxide (GO), and graphene oxide functionalized with amine groups (GON) were used as nanofillers. Rheological studies showed that the addition of graphene to the resin resulted in a slower curing reaction in comparison to the neat epoxy at temperatures of 60 and 70 ◦C. G-SDS did not affect the curing kinetics of the epoxy resin, while the addition of GO and GON to the resin accelerated the curing kinetics and reduced the reaction activation energy. The most significant improvements were observed for GON, with a reduction in gelation time at 60 ◦C from approximately 40 min to 17 min, and at 80 ◦C from 11 min to 6 min, compared to the neat epoxy. The functionalization also resulted in a significant increase in the dynamic storage (E′) and loss (E″) moduli, indicating that functionalization of graphene enhances its interfacial interaction with the epoxy matrix. Specifically, GON yielded a 70 % increase in E′ and a 28 % increase in E″ compared to the neat epoxy.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur David, Éric Demarquette, Nicole R. |
| Affiliation: | Génie mécanique, Génie mécanique |
| Date de dépôt: | 13 févr. 2025 16:41 |
| Dernière modification: | 04 mars 2025 14:41 |
| URI: | https://espace2.etsmtl.ca/id/eprint/30525 |
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