Hydrothermal ageing of graphene/carbon nanotubes/epoxy hybrid nanocomposites

Arribas Arribas, Carmen and Gonzalez Prolongo, Margarita and Sanchez-Cabezudo Tirado, Marta and Moriche, R. and Prolongo, S. G. (2019). Hydrothermal ageing of graphene/carbon nanotubes/epoxy hybrid nanocomposites. "Polymer Degradation and Stability", v. 170 ; ISSN 0141-3910. https://doi.org/10.1016/j.polymdegradstab.2019.109003.

Description

Title: Hydrothermal ageing of graphene/carbon nanotubes/epoxy hybrid nanocomposites
Author/s:
  • Arribas Arribas, Carmen
  • Gonzalez Prolongo, Margarita
  • Sanchez-Cabezudo Tirado, Marta
  • Moriche, R.
  • Prolongo, S. G.
Item Type: Article
Título de Revista/Publicación: Polymer Degradation and Stability
Date: December 2019
ISSN: 0141-3910
Volume: 170
Subjects:
Freetext Keywords: Epoxy; graphene; carbon nanotubes; water ageing; diffusion coefficient; two stage diffusion; thermo-mechanical and electrical properties
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Materiales y Producción Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The hydrothermal ageing of hybrid nanocomposites formed by carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) incorporated into an epoxy matrix was studied. In order to avoid the weak interface, amine functionalized GNPs were used which are reactive with the epoxy matrix. The content of CNTs was 0.1 wt% and the GNPs content ranged from 5 to 12 wt%. The isothermal water absorption was measured until very long times (almost two years). Reduction of water absorption with the addition of either carbon nanotubes or graphene nanoplatelets has been found independently of the ageing time. The results can be described by a two-stage diffusion model with the first and second stages being diffusion and matrix relaxation controlled respectively. The obtained diffusion coefficient for the neat epoxy thermoset is higher than those of nanocomposites, which decreases with the increase of GNPs content. Theeffect of water absorbed on the dynamic-mechanical properties and on the electrical conductivity of the nanocomposites was analyzed. Whatever the temperature the storage modulus shows a continuous increase with the increase of the nanoparticles content, the effect of hydrothermal ageing is to decrease the modulus only in the glassy state (T < Tg). Water aged specimens show broadening of the tanδ peak related to the plasticization of the matrix. Tg of aged specimens coincides with the one of the unaged matrix, indicating that hydrothermal ageing does not produce noticeable matrix damage even after two years. Water aged specimens show similar electrical conductivity than unaged ones,which is another indication of no degradation of samples by water.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT2016-78825UnspecifiedUnspecifiedUnspecified

More information

Item ID: 64152
DC Identifier: https://oa.upm.es/64152/
OAI Identifier: oai:oa.upm.es:64152
DOI: 10.1016/j.polymdegradstab.2019.109003
Official URL: https://www.sciencedirect.com/science/article/pii/S0141391019303313?via%3Dihub
Deposited by: Memoria Investigacion
Deposited on: 11 Jan 2022 12:45
Last Modified: 11 Jan 2022 12:45
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