Chemical Behavior of Water Absorption in a Carbon/Epoxy 3D Woven Composite

In this paper, moisture absorption of carbon/epoxy‐amine 3D woven composite materials is studied by immersion in distilled water at 70°C. If the moisture uptake measured by gravimetry is slow and weak over time, various antagonistic phenomena appear. Desorption highlights mass losses due to chemical...

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Bibliographic Details
Published in:Macromolecular symposia. 2022-10, Vol.405 (1), p.n/a
Main Authors: Gillet, Camille, Nassiet, Valérie, Poncin‐Epaillard, Fabienne, Hassoune‐Rhabbour, Bouchra, Tchalla, Tatiana
Format: Article
Language:English
Subjects:
3D woven composite
Aging
Carbon
Chemical behavior
Composite materials
Distilled water
epoxy‐amine
Exudation
Fourier transforms
hygrothermal ageing
Infrared spectroscopy
Moisture content
Moisture effects
Oxidation
Photoelectrons
silica
Surface chemistry
Three dimensional composites
Water absorption
Water content
Woven composites
XPS
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Summary:In this paper, moisture absorption of carbon/epoxy‐amine 3D woven composite materials is studied by immersion in distilled water at 70°C. If the moisture uptake measured by gravimetry is slow and weak over time, various antagonistic phenomena appear. Desorption highlights mass losses due to chemical changes in the material that mask the true water content of the aged samples. The X‐ray photoelectron spectrometry (XPS) reveals a decrease in the carbon and nitrogen proportions and an increase in the oxygen proportions after ageing, allowing to observe surface erosion and oxidation of the matrix. Finally, the rise of silicon is a sign of extraction of the silica‐based particles exuded to the surface. This presence is confirmed by Fourier transform infrared spectroscopy (FTIR).
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.202100213