Mechanical and Functional Tradeoffs in Multiphase Liquid Metal, Solid Particle Soft Composites

dc.contributor.author Tutika, Ravi
dc.contributor.author Zhou, Shihuai
dc.contributor.author Bartlett, Michael
dc.contributor.author Napolitano, Ralph
dc.contributor.department Ames National Laboratory
dc.contributor.department Materials Science and Engineering
dc.date 2020-12-17T03:11:31.000
dc.date.accessioned 2021-02-26T03:30:03Z
dc.date.available 2021-02-26T03:30:03Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 2018
dc.date.issued 2018-11-07
dc.description.abstract <p>Soft materials with high thermal conductivity are critical for flexible electronics, energy storage and transfer, and human‐interface devices and robotics. However, fundamental heat transport limitations in soft and deformable materials present significant challenges for achieving high thermal conductivity. Here, a systematic study of soft composites with solid, liquid, and solid–liquid multiphase metal fillers dispersed in elastomers reveals key strategies to tune the thermal‐mechanical response of soft materials. Experiments supported by thermodynamic and kinetic modeling demonstrate that multiphase systems quickly form intermetallics that solidify and degrade mechanical response with modest gains in thermal conductivity. In contrast, liquid metal inclusions provide benefits over solid and multiphase fillers as they can be loaded up to 80% by volume with the composites being electrically insulating, soft (<1 MPa modulus), and highly thermally conductive (<em>k</em> = 6.7 ± 0.1 W m−1 K−1). The thermal‐mechanical response of the composites is summarized and quantitative design maps are presented for soft, highly thermally conductive materials. This leads to soft materials with unique thermal‐mechanical combinations, highlighted by a liquid metal composite with an unprecedented thermal conductivity of 11.0 ± 0.5 W m−1 K−1 when strained. These materials and approach enable diverse applications from soft conformal materials for stretchable electronics to thermal interface materials in integrated circuits.</p>
dc.description.comments <p>This is the peer-reviewed version of the following article: Tutika, Ravi, Shihuai H. Zhou, Ralph E. Napolitano, and Michael D. Bartlett. "Mechanical and functional tradeoffs in multiphase liquid metal, solid particle soft composites." Advanced Functional Materials 28, no. 45 (2018): 1804336, which has been published in final form at DOI: <a href="https://doi.org/10.1002/adfm.201804336" target="_blank">10.1002/adfm.201804336</a>. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/mse_pubs/394/
dc.identifier.articleid 1397
dc.identifier.contextkey 20643512
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath mse_pubs/394
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/96725
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/mse_pubs/394/2018_NapolitanoRalph_MechanicalFunctional.pdf|||Fri Jan 14 23:56:04 UTC 2022
dc.source.uri 10.1002/adfm.201804336
dc.subject.disciplines Materials Science and Engineering
dc.subject.keywords high thermal conductivity
dc.subject.keywords liquid metal
dc.subject.keywords multifunctional soft composites
dc.subject.keywords multiphase composites
dc.subject.keywords stretchable electronics
dc.title Mechanical and Functional Tradeoffs in Multiphase Liquid Metal, Solid Particle Soft Composites
dc.type article
dc.type.genre article
dspace.entity.type Publication
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