Details
| Original language | English |
|---|---|
| Article number | 117304 |
| Journal | Composite structures |
| Volume | 321 |
| Early online date | 24 Jun 2023 |
| Publication status | Published - 1 Oct 2023 |
Abstract
Magnetic nanoparticles of high magnetic susceptibility, such as magnetite (Fe3O4), have been used for wireless heating of adhesives and composites through the magnetic hysteresis loss mechanism, but the high concentrations of nanoparticles needed to meet heating performance targets can degrade mechanical properties. Herein, we present an in-situ aligning method to enhance the heating efficiency of magnetite nanoparticles in a nylon thermoplastic matrix without adversely affecting its mechanical strength. A composite adhesive was made by dispersing Fe3O4 nanoparticles in a nylon matrix followed by hot melting. Experimental results show that by subjecting the adhesive to an alternating magnetic field during the hot-melt process, its heating rate can be improved by 200% compared to that without applying the magnetic field. The improvement in the heating performance has been identified to stem from the alignment of the ease axis of the magnetic nanoparticles. This in-situ aligning technique enables better induction heating performance with the same amount of Fe3O4 nanoparticles, avoiding the agglomeration problem of high nanoparticle concentrations. Moreover, this technique makes it possible to develop high-performance self-heating thermoplastic adhesive for reversible bonding and self-healing solution with a wide range of applications, such as bonding and debonding of composites, temporary attachment of systems, and recyclable bonded structures.
Keywords
- Inductive heating, Iron oxide nanoparticle, Magnetic aligning, Magnetic hysteresis loss, Thermoplastic adhesive
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Civil and Structural Engineering
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In: Composite structures, Vol. 321, 117304, 01.10.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - In-situ aligning magnetic nanoparticles in thermoplastic adhesives for contactless rapid joining of composite structures
AU - Sha, Zhao
AU - Cheng, Xinying
AU - Charles, Andrew D.M.
AU - Zhou, Yang
AU - Islam, Mohammad S.
AU - Rider, Andrew N.
AU - Peng, Shuhua
AU - Lim, May
AU - Timchenko, Victoria
AU - Wang, Chun H.
N1 - Funding Information: This research is Phase 2 of “Adhesives for Structural Joining” topic under the scheme of “A Joint Effort”, which is supported by Commonwealth of Australia as represented by Defence Science and Technology (DST Group) and Small Business Innovation Research for Defence (SBIRD), part of the Next Generation Technologies Fund. The authors acknowledge the facilities and the scientific and technical assistance of Microscopy Australia at the Electron Microscope Unit (EMU) within the Mark Wainwright Analytical Centre (MWAC) at UNSW Sydney.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - Magnetic nanoparticles of high magnetic susceptibility, such as magnetite (Fe3O4), have been used for wireless heating of adhesives and composites through the magnetic hysteresis loss mechanism, but the high concentrations of nanoparticles needed to meet heating performance targets can degrade mechanical properties. Herein, we present an in-situ aligning method to enhance the heating efficiency of magnetite nanoparticles in a nylon thermoplastic matrix without adversely affecting its mechanical strength. A composite adhesive was made by dispersing Fe3O4 nanoparticles in a nylon matrix followed by hot melting. Experimental results show that by subjecting the adhesive to an alternating magnetic field during the hot-melt process, its heating rate can be improved by 200% compared to that without applying the magnetic field. The improvement in the heating performance has been identified to stem from the alignment of the ease axis of the magnetic nanoparticles. This in-situ aligning technique enables better induction heating performance with the same amount of Fe3O4 nanoparticles, avoiding the agglomeration problem of high nanoparticle concentrations. Moreover, this technique makes it possible to develop high-performance self-heating thermoplastic adhesive for reversible bonding and self-healing solution with a wide range of applications, such as bonding and debonding of composites, temporary attachment of systems, and recyclable bonded structures.
AB - Magnetic nanoparticles of high magnetic susceptibility, such as magnetite (Fe3O4), have been used for wireless heating of adhesives and composites through the magnetic hysteresis loss mechanism, but the high concentrations of nanoparticles needed to meet heating performance targets can degrade mechanical properties. Herein, we present an in-situ aligning method to enhance the heating efficiency of magnetite nanoparticles in a nylon thermoplastic matrix without adversely affecting its mechanical strength. A composite adhesive was made by dispersing Fe3O4 nanoparticles in a nylon matrix followed by hot melting. Experimental results show that by subjecting the adhesive to an alternating magnetic field during the hot-melt process, its heating rate can be improved by 200% compared to that without applying the magnetic field. The improvement in the heating performance has been identified to stem from the alignment of the ease axis of the magnetic nanoparticles. This in-situ aligning technique enables better induction heating performance with the same amount of Fe3O4 nanoparticles, avoiding the agglomeration problem of high nanoparticle concentrations. Moreover, this technique makes it possible to develop high-performance self-heating thermoplastic adhesive for reversible bonding and self-healing solution with a wide range of applications, such as bonding and debonding of composites, temporary attachment of systems, and recyclable bonded structures.
KW - Inductive heating
KW - Iron oxide nanoparticle
KW - Magnetic aligning
KW - Magnetic hysteresis loss
KW - Thermoplastic adhesive
UR - http://www.scopus.com/inward/record.url?scp=85164701458&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2023.117304
DO - 10.1016/j.compstruct.2023.117304
M3 - Article
AN - SCOPUS:85164701458
VL - 321
JO - Composite structures
JF - Composite structures
SN - 0263-8223
M1 - 117304
ER -