Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/87909
Título: | Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting |
Autor(es): | Abbass, Ali Paiva, Maria C. Oliveira, Daniel V. Lourenço, Paulo B. Fangueiro, Raúl |
Palavras-chave: | A-Natural fibers A-Graphene D-Mechanical testing E-Surface treatments |
Data: | 2023 |
Editora: | Elsevier 1 |
Revista: | Composites Part A: Applied Science and Manufacturing |
Citação: | Abbass, A., Paiva, M. C., Oliveira, D. V., Lourenço, P. B., & Fangueiro, R. (2023, March). Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofitting. Composites Part A: Applied Science and Manufacturing. Elsevier BV. http://doi.org/10.1016/j.compositesa.2022.107379 |
Resumo(s): | Natural fibers form economic and environmentally friendly substitutes for synthetic fibers in civil engineering composites. However, natural fibers present flaws, irregular morphology and reduced durability in alkaline media. The present work reports the application of a new nanocomposite-based coating for flax and hemp fibers that enhances their mechanical properties and environmental resistance. The nanocomposite coating is based on graphene nanoplatelets (GNPs) and a waterborne polyurethane (WPU). Nanocomposites were prepared with pristine and surface modified GNPs, the latter obtained by polydopamine self-polymerization, tailoring the surface chemistry for strong interfaces with polyurethane. The coated fibers demonstrate enhanced tensile properties and low water absorption. Hemp yarns present 120% and 163% increases in tensile strength and elastic modulus, respectively, compared to the as-received yarns. The yarn properties achieved are adequate for their application as reinforcement of brittle and hydrophilic matrices such as lime, thus setting a new milestone in natural fiber composites manufacturing. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/87909 |
DOI: | 10.1016/j.compositesa.2022.107379 |
ISSN: | 1359-835X |
Versão da editora: | https://doi.org/10.1016/j.compositesa.2022.107379 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Composites Part A_ Ali_ 2023.pdf | 4,56 MB | Adobe PDF | Ver/Abrir |