Amino-functionalized carbon nanotubes for effectively improving the mechanical properties of pre-impregnated epoxy resin/carbon fiber

Autor(es)

dos Santos, Alan Silva ^[1] ; Oliveira, Thais Cardoso ^[1] ; Rodrigues, Karla Faquine ^[1] ; Coutinho Silva, Amanda Alvarenga ^[1] ; Lauer Coppio, Gustavo Jose ^[2] ; da Silva Fonseca, Beatriz Carvalho ^[3] ; Nunes Simonetti, Evelyn Alves ^[4] ; Cividanes, Luciana De Simone ^[1]

Afiliação do(s) autor(es)

^[1] Aeronaut Inst Technol ITA, Dept Chem, Praca Marechal Eduardo Comes 50, BR-12228900 Sao Jose Dos Campos - Brazil

^[2] Fed Inst Educ Sci & Technol Sao Paulo IFSP, Dept Bldg, Itapetininga - Brazil

^[3] Natl Inst Space Res INPE, Res & Dev Grp Mat & Plasma GPDMP, Sao Jose Dos Campos - Brazil

^[4] Fed Inst Educ Sci & Technol Sao Paulo IFSP, Dept Chem, Sao Jose Dos Campos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Polymer Science; v. 138, n. 46 JUL 2021.
• Citações Web of Science: 0

Resumo

Pre-impregnated carbon fiber/epoxy resin (CF/epoxy prepreg) gained its popularity for significant stress applications, especially in the aerospace industry, owing to its excellent resistance and low specific mass. However, these CF/epoxy prepregs have a tendency to crack propagation. A solution for the prepregs fragility is the addition of carbon nanotubes (CNTs), especially those functionalized with amino groups, reinforcing the material due to its exceptional mechanical properties. In this work, the influence of the carbon chain length of two different amino-functionalized CNTs from diverse backgrounds (commercial and laboratory growth CNTs) is studied. The nanofillers were added in CF/epoxy prepregs by dry spraying without solvent aid. CNTs' samples were characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, transmission electron microscopy, and thermogravimetric analysis (TGA), while the composites were analyzed by TGA, dynamic-mechanical analysis, and field emission scanning electron microscopy. The various surface treatment occurred at different levels according to the CNTs background, and all samples exhibited a distinct behavior. These differences were also observed in the composites' thermomechanical performance: CNTs functionalized with larger carbon chain amine presented the best results, with an increase of almost 100% in the storage moduli (E'), confirming the efficiency of amino-functionalized CNTs in the reinforcement of CF/epoxy prepregs. (AU)

• Processo FAPESP: 19/13723-7 - Revestimentos nanocompósitos obtidos via sol-gel para adesão e proteção contra corrosão de ligas de alumínio
• Beneficiário: Luciana de Simone Cividanes Coppio
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/23844-6 - Estudo do efeito da funcionalização de materiais carbonosos para a produção de nanocompósitos de PEAD para aplicações aeroespaciais
• Beneficiário: Thais Cardoso de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Mestrado