Hybrid 2D nanostructures for mechanical reinforcement and thermal conductivity enhancement in polymer composites

Autor(es):Mostrar menos -

Ribeiro, Helio ^{[1, 2]} ; Trigueiro, Joao P. C. ^{[1, 3]} ; Owuor, Peter S. ^[2] ; Machado, Leonardo D. ^[4] ; Woellner, Cristiano F. ^{[2, 5]} ; Pedrotti, Jairo J. ^{[2, 6]} ; Jaques, Ygor M. ^{[2, 5]} ; Kosolwattana, Suppanat ^[2] ; Chipara, Alin ^[2] ; Silva, Wellington M. ^[1] ; Silva, Carlos J. R. ^[7] ; Galvdo, Douglas S. ^[5] ; Chopra, Nitin ^[8] ; Odeh, Ihab N. ^[8] ; Tiwary, Chandra S. ^[2] ; Silva, Glaura G. ^[1] ; Ajayan, Pulickel M. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Minas Gerais, Dept Quim, Ave Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG - Brazil

^[2] Rice Univ, Dept Mat Sci & Nanoengn, 6100 Main St, Houston, TX 77005 - USA

^[3] Inst Fed Minas Gerais, Campus Congonhas, BR-36415000 Congonhas, MG - Brazil

^[4] Univ Fed Rio Grande do Norte, Campus Univ Lagoa Nova, BR-59072970 Natal, RN - Brazil

^[5] Univ Estadual Campinas, Dept Fis Aplicada, Rua Sergio Buarque de Holanda 777, BR-13083859 Campinas, SP - Brazil

^[6] Univ Presbiteriana Mackenzie, Ctr Pesquisas Avancadas Grafeno Nanomat & Nanotec, Rua Consolacao 930, BR-01302907 Sao Paulo, SP - Brazil

^[7] Univ Minho, Dept Quim, Campus Gualtar, P-4710057 Braga - Portugal

^[8] SABIC Amer Inc, Sugar Land, TX 77478 - USA

• Tipo de documento: Artigo Científico
• Fonte: COMPOSITES SCIENCE AND TECHNOLOGY; v. 159, p. 103-110, MAY 3 2018.
• Citações Web of Science: 4

Resumo

Hexagonal boron nitride (h-BN), graphene oxide (GO) and hybrid (GO/h-BN) nanosheets were employed as fillers in order to enhance the physical properties of the polymer matrix. Composites based in epoxy and these two-dimensional (2D) nanofillers were produced with different wt% and their microstructure, mechanical and thermal properties were investigated. Increases up to 140% in tensile strength, 177% in ultimate strain and 32% in elastic modulus were observed for the hybrid GO/h-BN composite with 0.5 wt % content. The hybrid nanofiller also contributed to the increase up to 142% on thermal conductivity with respect to the pure epoxy for GO/h-BN composite with 2.0 wt% content. Molecular dynamic simulation was used to predict the behavior of possible stacking arrangements between h-BN and GO nanosheets tensioned by normal and shear forces. The results showed that the hybrid GO/h-BN combination can prevent the re-stacking process of exfoliated layers, demonstrating the synergism between these nanostructures with the final effect of better dispersion in the composite material. The excellent thermal and mechanical performance of these hybrid composites engineered by the combination of different types of the 2D inorganic nanoparticles make them multifunctional candidates for advanced materials applications. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/12340-9 - Propriedades estruturais e mecânicas de espumas baseadas no carbono
• Beneficiário: Cristiano Francisco Woellner
• Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs