JOAO COUTINHO FERREIRA

Projetos de Pesquisa
Unidades Organizacionais
Cargo

Filtros

20241
Limpar filtros

Configurações

Autor: JOAO COUTINHO FERREIRA × search.filters.applied.f.ispartof: Diamond and Related Materials ×

Resultados de Busca

Agora exibindo 1 - 1 de 1
  • Imagem de Miniatura
    Artigo IPEN-doc 30849
    Development of hydrophobic graphenoid layer on Portland cement for non-thermal plasma method
    2024 - PEREIRA FILHO, N.G.; SOARES, E.P.; FERREIRA, J.C.; SOUZA, R.F.B. de; ANDRADE, D.A.; NETO, A.O.
    This study focuses on the development of hydrophobic layer on Portland cement using graphenoid materials to enhance impermeability and hydrophobicity. X-ray diffraction analysis indicated that characteristic peaks associated with concrete, such as ettringite, calcium hydroxide, and calcite, remained intact. The application of graphenoid material produced by non-thermal plasma resulted in the formation of carbonaceous structures, minimally affecting the overall cement structure. Raman spectroscopy provided detailed insights into the composition, highlighting the presence of specific and indicating boundary defects. Moreover, contact angle measurements confirmed a substantial increase in hydrophobicity for the graphene-coated cement, with an average angle of 117° ± 4.72° demonstrated graphenoid material layers deposited over structural defects, effectively waterproofing and enhancing local hydrophobicity.