Optimizing the Magnetocuring of Epoxy Resins via Electromagnetic Additives

Richa Chaudhary; Varun Chaudhary; Yoshiyuki Suda; Raju V. Ramanujan; Terry W.J. Steele

doi:10.1002/admi.202100881

Optimizing the Magnetocuring of Epoxy Resins via Electromagnetic Additives

Richa Chaudhary, Varun Chaudhary, Yoshiyuki Suda, Raju V. Ramanujan, Terry W.J. Steele^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Magnetocuring of adhesives refers to the curing of an epoxy + Curie temperature controlled magnetic nanoparticles (CNP) composite using a suitable alternating magnetic field. The controlled heating of the CNP results in remote, wireless curing without resin overheating. However, typical CNP possess only a fraction of the heat output of ferric oxide nanoparticles, quantified as the specific absorption rate (SAR). Previous investigations of epoxy + CNP adhesives revealed a SAR of 5 W.g⁻¹, which is 10–100× less than that of ferric oxides. Here, it is demonstrated that SAR can be improved to up to 60 W.g⁻¹ by tuning CNP composition and by the addition of carbon allotropes (CA) within the resin. Heat generation and dissipation can be also regulated by electromagnetic shielding, resin conductivity, and viscosity. Nanocoils and nanotubes of CA result in improved heating profiles of epoxy thermosets. Magnetocured composites achieve activation within 180 s due to the improved SAR and addition of CA. Remarkably, under optimized conditions, a relatively stable one-pot adhesive was formed by magnetocuring of epoxy + CNP + CA composites without a hardener.

Original language	English
Article number	2100881
Journal	Advanced Materials Interfaces
Volume	8
Issue number	17
DOIs	https://doi.org/10.1002/admi.202100881
Publication status	Published - Sept 9 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021 Wiley-VCH GmbH

ASJC Scopus Subject Areas

Mechanics of Materials
Mechanical Engineering

Keywords

adhesives
carbon nanocoils
carbon nanotubes
curie magnetic nanoparticles
thermoplastics
thermosets

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10.1002/admi.202100881

Cite this

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title = "Optimizing the Magnetocuring of Epoxy Resins via Electromagnetic Additives",

abstract = "Magnetocuring of adhesives refers to the curing of an epoxy + Curie temperature controlled magnetic nanoparticles (CNP) composite using a suitable alternating magnetic field. The controlled heating of the CNP results in remote, wireless curing without resin overheating. However, typical CNP possess only a fraction of the heat output of ferric oxide nanoparticles, quantified as the specific absorption rate (SAR). Previous investigations of epoxy + CNP adhesives revealed a SAR of 5 W.g−1, which is 10–100× less than that of ferric oxides. Here, it is demonstrated that SAR can be improved to up to 60 W.g−1 by tuning CNP composition and by the addition of carbon allotropes (CA) within the resin. Heat generation and dissipation can be also regulated by electromagnetic shielding, resin conductivity, and viscosity. Nanocoils and nanotubes of CA result in improved heating profiles of epoxy thermosets. Magnetocured composites achieve activation within 180 s due to the improved SAR and addition of CA. Remarkably, under optimized conditions, a relatively stable one-pot adhesive was formed by magnetocuring of epoxy + CNP + CA composites without a hardener.",

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doi = "10.1002/admi.202100881",

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AU - Steele, Terry W.J.

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KW - thermosets

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Optimizing the Magnetocuring of Epoxy Resins via Electromagnetic Additives

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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