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Title: Magnetocuring of temperature failsafe epoxy adhesives
Authors: Chaudhary, Richa
Chaudhary, Varun
Ramanujan, Raju V.
Steele, Terry W. J.
Keywords: Engineering::Materials::Composite materials
Engineering::Materials::Magnetic materials
Issue Date: 2020
Source: 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
Project: IRG17283008
Journal: Applied Materials Today
Abstract: 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.
ISSN: 2352-9407
DOI: 10.1016/j.apmt.2020.100824
Rights: © 2020 Elsevier Ltd. All rights reserved. This paper was published in Applied Materials Today and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20221231
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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