Nano liquid metal for the preparation of a thermally conductive and electrically insulating material with high stability
P. Fan,P. Fan,Ziqiao Sun,Yuren Wang,Haixin Chang,Haixin Chang,Pilan Zhang,Siyuan Yao,Cuige Lu,Wei Rao,Jiaman Liu,Jiaman Liu +11 more
TLDR
In this paper, an isotropic nano-liquid metal thermally-conductive and electrically insulating material (nLM-THEM) is developed by combining a modified polymer and well-dispersed nanoparticles, achieving an ∼50× increase in thermal conductivity over the base polymer.Abstract:
Dielectric materials typically demonstrate poor thermal conductivity, which limits their application in emerging technologies in integrated circuits, computer chips, light-emitting diode lamps, and other electronic packaging areas. Using liquid metal microdroplets as inclusions to develop thermal interface materials has been shown to effectively improve thermal pathways, but this type of material may become electroconductive with the application of a concentrated compressive stress. In this study, an isotropic nano-liquid metal thermally-conductive and electrically-insulating material (nLM-THEM) is developed by combining a modified polymer and well-dispersed nanoparticles, achieving an ∼50× increase in thermal conductivity over the base polymer. In addition, the thermal conductivity of nLM-THEMs exhibits no significant change with varying humidity and a stable anti-corrosion effect even in direct contact with aluminum. More importantly, nLM-THEMs demonstrate a stable electrical insulating property upon compressive stress, while conventional micro-LM-THEMs exude liquid metal. This exceptional combination of thermal and electrical insulation properties is enabled by the interconnection of uniform and spherical liquid metal nanoparticles to create more thermally-conductive pathways, and surfactant modified nanoparticles ensure excellent electric insulation. Moreover, this material can achieve passive heat exchange through rapid heat dissipation, which demonstrates its great application potential in the electronic packaging area.read more
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Journal Article
High thermal conductivity in soft elastomers with elongated liquid metal inclusions.
Navid Kazem,Michael D. Bartlett,Matthew J. Powell-Palm,Xiaonan Huang,Wenhuan Sun,Jonathan A. Malen,Carmel Majidi +6 more
TL;DR: An electrically insulating composite that exhibits an unprecedented combination of metal-like thermal conductivity, an elastic compliance similar to soft biological tissue, and the capability to undergo extreme deformations is engineering by engineering an elastomer composite embedded with elongated inclusions of liquid metal that function as thermally conductive pathways.
Journal ArticleDOI
Liquid Metal Supercooling for Low-Temperature Thermoelectric Wearables
Mohammad H. Malakooti,Navid Kazem,Jiajun Yan,Chengfeng Pan,Eric Markvicka,Krzysztof Matyjaszewski,Carmel Majidi +6 more
TL;DR: In this article, it is shown that the confinement of liquid metal (LM) droplets to micro-/nanometer length scales significantly suppresses their freezing temperature (down to −84.1 from −5.9 °C) and melting point, independent of the choice of matrix material and processing conditions.
Journal ArticleDOI
Transformable soft liquid metal micro/nanomaterials
TL;DR: In this paper, the state-of-the-art progress in fabricating methods, highlight unique features, and discuss applications of liquid metal micro/nanoparticles in biomedicine, soft electronics, thermal management and soft motors.
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Mechanical and Functional Tradeoffs in Multiphase Liquid Metal, Solid Particle Soft Composites
TL;DR: In this paper, 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.
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Oxide-Mediated Formation of Chemically Stable Tungsten-Liquid Metal Mixtures for Enhanced Thermal Interfaces.
Wilson Kong,Zhongyong Wang,Meng Wang,Kenneth C. Manning,Aastha Uppal,Matthew D. Green,Robert Y. Wang,Konrad Rykaczewski +7 more
TL;DR: It is shown that the formation of a nanometer-scale LM oxide in oxygen-rich environments allows highly nonwetting tungsten particles to mix into LMs, and the oxide-assisted mechanism behind this wetting process is revealed.
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Journal ArticleDOI
High thermal conductivity in soft elastomers with elongated liquid metal inclusions
Michael D. Bartlett,Navid Kazem,Matthew J. Powell-Palm,Xiaonan Huang,Wenhuan Sun,Jonathan A. Malen,Carmel Majidi +6 more
TL;DR: In this paper, liquid metal microdroplets are incorporated into a soft elastomer to achieve an unprecedented combination of metal-like thermal conductivity, an elastic compliance similar to soft biological tissue, and a unique thermal-mechanical coupling that exploits the deformability of the LM inclusions to create thermally conductive pathways in situ.