A Liquid-Metal-Elastomer Nanocomposite for Stretchable Dielectric Materials.
Chengfeng Pan,Eric Markvicka,Mohammad H. Malakooti,Jiajun Yan,Leiming Hu,Krzysztof Matyjaszewski,Carmel Majidi +6 more
TLDR
The role of droplet size is examined and it is found that embedding an elastomer with a polydisperse distribution of nanoscale LM inclusions can enhance its electrical permittivity without significantly degrading its elastic compliance, stretchability, or dielectric breakdown strength.Abstract:
Stretchable high-dielectric-constant materials are crucial for electronic applications in emerging domains such as wearable computing and soft robotics. While previous efforts have shown promising materials architectures in the form of dielectric nano-/microinclusions embedded in stretchable matrices, the limited mechanical compliance of these materials significantly limits their practical application as soft energy-harvesting/storage transducers and actuators. Here, a class of liquid metal (LM)-elastomer nanocomposites is presented with elastic and dielectric properties that make them uniquely suited for applications in soft-matter engineering. In particular, the role of droplet size is examined and it is found that embedding an elastomer with a polydisperse distribution of nanoscale LM inclusions can enhance its electrical permittivity without significantly degrading its elastic compliance, stretchability, or dielectric breakdown strength. In contrast, elastomers embedded with microscale droplets exhibit similar improvements in permittivity but a dramatic reduction in breakdown strength. The unique enabling properties and practicality of LM-elastomer nanocomposites for use in soft machines and electronics is demonstrated through enhancements in performance of a dielectric elastomer actuator and energy-harvesting transducer.read more
Citations
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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 Composites
TL;DR: In this article, the fundamental progress in liquid metal composites is summarized and reviewed in three categories: LM composites with core-shell structure, LM-polymer composites, and LM-particle composites.
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Highly Stretchable Polymer Composite with Strain-Enhanced Electromagnetic Interference Shielding Effectiveness.
Bin Yao,Bin Yao,Wei Hong,Tianwu Chen,Zhubing Han,Xinwei Xu,Renchao Hu,Jianyu Hao,Changhao Li,He Li,Steven Edward Perini,Michael T. Lanagan,Sulin Zhang,Qing Wang,Hong Wang,Hong Wang +15 more
TL;DR: A highly stretchable polymer composite embedded with a three-dimensional (3D) liquid-metal (LM) network exhibiting substantial increases of EMI SE when stretched is reported, which matches the EMISE of metallic plates over an exceptionally broad frequency range of 2.65-40 GHz.
Journal ArticleDOI
Healable, Degradable, and Conductive MXene Nanocomposite Hydrogel for Multifunctional Epidermal Sensors.
TL;DR: In this paper, the authors proposed a multifunctional epidermal sensor based on the highly stretchable, self-healing, degradable, and biocompatible nanocomposite hydrogel, which is fabricated from the conformal coating of a MXene (Ti3C2Tx) network by the hydrogels polymer networks involving poly(acrylic acid) and amorphous calcium carbonate.
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