The "Superlubricity State" of Carbonaceous Fillers on Polymer Composites

Autor(es)

Ferreira, Eder H. C. ; Lima, Lucas P. ; Fechine, Guilhermino J. M.

• Tipo de documento: Artigo Científico
• Fonte: MACROMOLECULAR CHEMISTRY AND PHYSICS; v. 221, n. 16, p. 7-pg., 2020-07-19.

Resumo

In 2019 Ferreira et al. observed for the first time the influence of the superlubricity phenomenon of platelet-like fillers on the properties of high molecular weight polyethylene (HMWPE) in the molten state. At the time, the study was carried out in the solid state of the polymer, analyzing the influence of the superlubricity phenomenon of oxide graphene and oxide graphite (GrO) agglomerates on the mechanical properties of the HMWPE. It was observed that the agglomerates, due to their superlubricity state, toughen the HMWPE polymer matrix. Here, mechanical tests (tensile), X-ray microtomography, and scanning electron microscopy are carried out to elucidate this phenomenon. The same is observed for polystyrene containing very poorly dispersed GrO. The results presented here are a paradigm shift, as it has always been thought that the presence of agglomerates is harmful, but the opposite is proven here. In general, this paper can contribute a lot to the development of new composites and nanocomposites based on fillers that present the superlubricity phenomenon. (AU)

• Processo FAPESP: 19/13416-7 - Propriedades mecânicas e tribológicas de nanocompósitos formados por Polietileno de Ultra Alta Massa Molar (PEUAMM) e materiais bidimensionais a base de carbono
• Beneficiário: Eder Henrique Coelho Ferreira
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 12/50259-8 - Grafeno: fotônica e opto-eletrônica: colaboração UPM-NUS
• Beneficiário: Antonio Helio de Castro Neto
• Modalidade de apoio: Auxílio à Pesquisa - Programa SPEC
• Processo FAPESP: 18/10910-8 - Fotodegradação e fotoestabilização de nanocompósitos poliméricos a base de cargas bidimensionais
• Beneficiário: Guilhermino José Macêdo Fechine
• Modalidade de apoio: Auxílio à Pesquisa - Regular