The role of physical structure and morphology on the photodegradation behaviour of polypropylene-graphene oxide nanocomposites

Autor(es)

de Oliveira, Yuri D. C. ^[1] ; Amurin, Leice G. ^[1] ; Valim, Fernanda C. F. ^[1] ; Fechine, Guilhermino J. M. ^[1] ; Andrade, Ricardo J. E. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Prebiteriana Mackenzie, Graphene & Nanomat Res Ctr, MackGraphe, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Polymer; v. 176, p. 146-158, AUG 2 2019.
• Citações Web of Science: 1

Resumo

In this work, for the first time, the effect of graphene oxide on the photodegradation behaviour of polypropylene-graphene oxide nanocomposites is presented. The graphene oxide was characterised, and AFM images show that the GO can be classified as multilayer-GO (mGO). Based on previous work, two new methods were used, liquid-phase feeding (LPF) and solid-solid deposition (SSD), to insert pre-exfoliated mGO into the polymer matrix. Moreover, the morphology and structure of the nanocomposites were analysed using an optical microscope, rheological and dynamic mechanical analysis, x-ray diffraction, and differential scanning calorimetry. The results show that stacked layers are obtained, especially for the SSD method, since it decreases the nanocomposites viscosity, mostly due to the self-lubricity of mGO layers. Finally, the photodegradation behaviour was investigated and revealed that mGO plays an important role, with a factor of three increase regarding photodegradation resistance, when compared to pure polypropylene. (AU)

• Processo FAPESP: 16/12400-1 - Preparação e caracterização de nanocompósitos de polipropileno/óxido de grafeno
• Beneficiário: Yuri Durighetto Coelho de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 17/07244-3 - Nanocompósitos poliméricos baseados em grafeno para aplicação em comunicações ópticas
• Beneficiário: Leice Gonçalves Amurin
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/22840-3 - Transferência direta a seco de grafeno-CVD para substratos poliméricos bidimensionais e tridimensionais
• Beneficiário: Guilhermino José Macêdo Fechine
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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