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Nanomaterials
Volume 12
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10.3390/nano12213913
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Article

Fe3O4-Nanoparticle-Doped Epoxy Resin as a Detachable Adhesive by Electromagnetic Heating for GFRP Single-Lap Joints

by
Xoan F. Sánchez-Romate
1,*,
Antonio del Bosque
1,
Anabel Crespo
2,
Rafael Alonso
2,
María Sánchez
1 and
Alejandro Ureña
1
1
Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Calle Tulipán s/n, 28933 Móstoles, Spain
2
AIMPLAS Instituto Tecnológico del Plástico, Carrer de Gustave Eiffel 4, 46980 Paterna, Spain
*
Author to whom correspondence should be addressed.
Nanomaterials 2022, 12(21), 3913; https://doi.org/10.3390/nano12213913
Submission received: 16 October 2022 / Revised: 28 October 2022 / Accepted: 4 November 2022 / Published: 6 November 2022
(This article belongs to the Section Nanocomposite Materials)
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Abstract

An adhesive based on a Fe3O4-nanoparticle (MNP)-doped epoxy resin was proposed for the development of detachable adhesive joints with GFRP substrates. The analysis of cryofractures showed that the increasing MNP content promotes a higher presence of larger aggregates and a lower sedimentation of nanoparticles due to the higher viscosity of the mixture. In this regard, the inclusion of expandable microspheres (MS) induces a more uniform dispersion of MNPs, reducing their sedimentation. The capability of the proposed adhesives for electromagnetic (EM) heating was also evaluated, with increases in temperature of around 100 °C at 750 A, enough to reach the Tg of the polymer required to facilitate the adhesive detachment, which is around 80 °C. Finally, the lap shear strength (LSS) of 14 and 20 wt.% MNP samples was evaluated in a single-lap shear joint with simultaneous EM heating. The LSS values were reduced by 60–80% at 750 A, thus promoting successful adhesive joint detachment under EM heating.
Keywords: adhesive joints; GFRP; electromagnetic heating; single-lap shear; composite structures adhesive joints; GFRP; electromagnetic heating; single-lap shear; composite structures

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MDPI and ACS Style

Sánchez-Romate, X.F.; del Bosque, A.; Crespo, A.; Alonso, R.; Sánchez, M.; Ureña, A. Fe3O4-Nanoparticle-Doped Epoxy Resin as a Detachable Adhesive by Electromagnetic Heating for GFRP Single-Lap Joints. Nanomaterials 2022, 12, 3913. https://doi.org/10.3390/nano12213913

AMA Style

Sánchez-Romate XF, del Bosque A, Crespo A, Alonso R, Sánchez M, Ureña A. Fe3O4-Nanoparticle-Doped Epoxy Resin as a Detachable Adhesive by Electromagnetic Heating for GFRP Single-Lap Joints. Nanomaterials. 2022; 12(21):3913. https://doi.org/10.3390/nano12213913

Chicago/Turabian Style

Sánchez-Romate, Xoan F., Antonio del Bosque, Anabel Crespo, Rafael Alonso, María Sánchez, and Alejandro Ureña. 2022. "Fe3O4-Nanoparticle-Doped Epoxy Resin as a Detachable Adhesive by Electromagnetic Heating for GFRP Single-Lap Joints" Nanomaterials 12, no. 21: 3913. https://doi.org/10.3390/nano12213913

APA Style

Sánchez-Romate, X. F., del Bosque, A., Crespo, A., Alonso, R., Sánchez, M., & Ureña, A. (2022). Fe3O4-Nanoparticle-Doped Epoxy Resin as a Detachable Adhesive by Electromagnetic Heating for GFRP Single-Lap Joints. Nanomaterials, 12(21), 3913. https://doi.org/10.3390/nano12213913

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