Magnetocuring of temperature failsafe epoxy adhesives

Adhesive technology is of high and increasing interest in a wide variety of conventional and emerging applications. One-component adhesives typically cure using moisture, heat and light. These approaches limit applications to specific substrates, inefficient handling in manufacturing, and can only b...

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Main Authors: Chaudhary, Richa, Chaudhary, Varun, Ramanujan, Raju V., Steele, Terry W. J.
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/144222
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1442222023-07-14T16:00:45Z Magnetocuring of temperature failsafe epoxy adhesives Chaudhary, Richa Chaudhary, Varun Ramanujan, Raju V. Steele, Terry W. J. School of Materials Science and Engineering Engineering::Materials::Composite materials Engineering::Materials::Magnetic materials Magnetocuring Curie Nanoparticles Adhesive technology is of high and increasing interest in a wide variety of conventional and emerging applications. One-component adhesives typically cure using moisture, heat and light. These approaches limit applications to specific substrates, inefficient handling in manufacturing, and can only be indirectly activated. Hence, we developed a method for remote, wireless, contactless curing of adhesives using alternating magnetic fields (AMF). This approach (“magnetocuring”) offers energy efficient, on-demand adhesion. Exposure of MnxZn1-xFe2O4 Curie temperature tuned magnetic nanoparticles (CNP) additives within commercial epoxy adhesives to an AMF cured thermoset resins within min with minimal rise in substrate temperature. The heating of the CNP “switches off” above its Curie temperature offering failsafe heating. The in-situ heating of the CNP can be controlled by CNP composition, CNP loading, and AMF strength. Internal temperatures of 160 °C could be reached in 5 min, allowing curing of most commercial epoxy adhesives without resin scorching. The maximum lap shear adhesion strength exceeded 6.5 MPa. Magnetocuring is demonstrated on wood, ceramics, and plastics, which is of considerable interest in sports, automotive, and aerospace industries. Agency for Science, Technology and Research (A*STAR) Accepted version This work was financially supported by the Agency for Science, Technology and Research (A*Star) IRG17283008 “Microprocessor-based methods of composite curing. The Facility for Analysis, Characterization, Testing is also acknowledged. 2020-10-21T06:26:17Z 2020-10-21T06:26:17Z 2020 Journal Article Chaudhary, R., Chaudhary, V., Ramanujan, R. V., & Steele, T. W. (2020). Magnetocuring of temperature failsafe epoxy adhesives. Applied Materials Today, 21, 100824-. doi:10.1016/j.apmt.2020.100824 2352-9407 https://hdl.handle.net/10356/144222 10.1016/j.apmt.2020.100824 21 en IRG17283008 Applied Materials Today © 2020 Elsevier Ltd. All rights reserved. This paper was published in Applied Materials Today and is made available with permission of Elsevier Ltd. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials::Composite materials
Engineering::Materials::Magnetic materials
Magnetocuring
Curie Nanoparticles
spellingShingle Engineering::Materials::Composite materials
Engineering::Materials::Magnetic materials
Magnetocuring
Curie Nanoparticles
Chaudhary, Richa
Chaudhary, Varun
Ramanujan, Raju V.
Steele, Terry W. J.
Magnetocuring of temperature failsafe epoxy adhesives
description Adhesive technology is of high and increasing interest in a wide variety of conventional and emerging applications. One-component adhesives typically cure using moisture, heat and light. These approaches limit applications to specific substrates, inefficient handling in manufacturing, and can only be indirectly activated. Hence, we developed a method for remote, wireless, contactless curing of adhesives using alternating magnetic fields (AMF). This approach (“magnetocuring”) offers energy efficient, on-demand adhesion. Exposure of MnxZn1-xFe2O4 Curie temperature tuned magnetic nanoparticles (CNP) additives within commercial epoxy adhesives to an AMF cured thermoset resins within min with minimal rise in substrate temperature. The heating of the CNP “switches off” above its Curie temperature offering failsafe heating. The in-situ heating of the CNP can be controlled by CNP composition, CNP loading, and AMF strength. Internal temperatures of 160 °C could be reached in 5 min, allowing curing of most commercial epoxy adhesives without resin scorching. The maximum lap shear adhesion strength exceeded 6.5 MPa. Magnetocuring is demonstrated on wood, ceramics, and plastics, which is of considerable interest in sports, automotive, and aerospace industries.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Chaudhary, Richa
Chaudhary, Varun
Ramanujan, Raju V.
Steele, Terry W. J.
format Article
author Chaudhary, Richa
Chaudhary, Varun
Ramanujan, Raju V.
Steele, Terry W. J.
author_sort Chaudhary, Richa
title Magnetocuring of temperature failsafe epoxy adhesives
title_short Magnetocuring of temperature failsafe epoxy adhesives
title_full Magnetocuring of temperature failsafe epoxy adhesives
title_fullStr Magnetocuring of temperature failsafe epoxy adhesives
title_full_unstemmed Magnetocuring of temperature failsafe epoxy adhesives
title_sort magnetocuring of temperature failsafe epoxy adhesives
publishDate 2020
url https://hdl.handle.net/10356/144222
_version_ 1773551359231000576