Liquid Metal Composites

Matter, Journal Year: 2020, Volume and Issue: 2(6), P. 1446 - 1480

Published: June 1, 2020

Language: Английский

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Transparent, Mechanically Strong, Extremely Tough, Self‐Recoverable, Healable Supramolecular Elastomers Facilely Fabricated via Dynamic Hard Domains Design for Multifunctional Applications

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 30(3)

Published: Oct. 22, 2019

Abstract The design and synthesis of supramolecular self‐healing polymers with high healing efficiency excellent integrated mechanical properties is challenging due to conflicting attributes dynamic properties. Herein, this study introduces a concept, that is, “dynamic hard domains,” balance performance, strength, elastic recovery, at the same time obtain extreme toughness. essential features domains include: (i) noncrystallized loose structure, (ii) low binding energy mobility, (iii) sequential dissociation rapid rearrangement. Based on strategy, simple one‐step polycondensation route reported synthesize transparent polyurethane‐urea elastomer (PPGTD‐IDA), which successfully combines decent toughness, outstanding notch‐sensitiveness, self‐recoverability, room‐temperature self‐healing. Upon rupture, PPGTD‐IDA completely restores within 48 h. Furthermore, results demonstrate repeatable prominent antiaging healability. Taking advantages merits PPGTD‐IDA, it can be utilized for fabricating impact‐resistant materials protection aluminum alloys as well stretchable conductors, exhibits unique characteristics such stable conductivity during stretching (even after or notch), automatic elimination notch stretching/releasing cycles.

Language: Английский

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Universal assembly of liquid metal particles in polymers enables elastic printed circuit board

Science, Journal Year: 2022, Volume and Issue: 378(6620), P. 637 - 641

Published: Nov. 10, 2022

An elastic printed circuit board (E-PCB) is a conductive framework used for the facile assembly of system-level stretchable electronics. E-PCBs require conductors that have high conductivity, stretchability, tough adhesion to various components, and imperceptible resistance changes even under large strain. We present liquid metal particle network (LMPNet) assembled by applying an acoustic field solid-state insulating composite as conductor. The LMPNet conductor satisfies all aforementioned requirements enables fabrication multilayered high-density E-PCB, in which numerous electronic components are intimately integrated create highly skin Furthermore, we could generate polymer matrices, including hydrogels, self-healing elastomers, photoresists, thus showing their potential use soft

Language: Английский

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Magnetic Liquid Metal (Fe‐EGaIn) Based Multifunctional Electronics for Remote Self‐Healing Materials, Degradable Electronics, and Thermal Transfer Printing

Advanced Science, Journal Year: 2019, Volume and Issue: 6(20)

Published: Aug. 22, 2019

Flexible materials with the ability to be bent, strained, or twisted play a critical role in soft robots and stretchable electronics. Although tremendous efforts are focused on developing new excellent stability, inevitable mechanical damage due long term deformation is still an urgent problem tackled. Here, magnetic healing method based Fe-doped liquid metal (Fe-GaIn) conductive ink via noncontact way proposed. Further, multifunctional flexible electronics designed combined performances of superior remote self-healing under field, water-degradable, thermal transfer printing, which attribute three parts including Fe-GaIn ink, degradable PVA substrate, adhesive fructose. The as-made light emitting diodes (LED) circuit demonstrated both structural functional repairing after single multipoint damage. time from pretty fast within 10 s. Due water-soluble film, recycling process simple immersing into water. Through heating, electric fructose can transferred other substrate high efficiency, broadens practical applications present system. novel hold great promise for electronics, transient robots.

Language: Английский

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Transparent, Highly Stretchable, Rehealable, Sensing, and Fully Recyclable Ionic Conductors Fabricated by One‐Step Polymerization Based on a Small Biological Molecule

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 29(30)

Published: May 29, 2019

Abstract To date, various stretchable conductors have been fabricated, but simultaneous realization of the transparency, high stretchability, electrical conductivity, self‐healing capability, and sensing property through a simple, fast, cost‐efficient approach is still challenging. Here, α‐lipoic acid (LA), naturally small biological molecule found in humans animals, used to fabricate transparent (>85%), highly (strain up 1100%), rehealable (mechanical healing efficiency 86%, 96%) ionic conductor by solvent‐free one‐step polymerization. Furthermore, with appealing sensitivity can be served as strain sensors detect distinguish human activities. Notably, this fully recycled reprocessed into new or adhesives direct heating process, which offers promising prospect great reduction electronic wastes that brought acute environmental pollution. In consideration extremely facile preparation available materials, satisfactory functionalities, full recyclability, emergence LA‐based believed open avenue for developing sustainable wearable devices future.

Language: Английский

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Polyvinyl Alcohol-Stabilized Liquid Metal Hydrogel for Wearable Transient Epidermal Sensors

ACS Applied Materials & Interfaces, Journal Year: 2019, Volume and Issue: 11(50), P. 47358 - 47364

Published: Nov. 22, 2019

Wearable epidermal sensors are attracting growing interests in human activity monitoring and flexible touch display, but they still limited by the poor self-healing property difficult dissolvable feature. Herein, we report polyvinyl alcohol (PVA)-stabilized liquid metal particles (LMPs) (PVA-LMPs) hydrogels with excellent performance feature for wearable sensors, constructed dispersing LMPs of eutectic gallium indium into borate-modified PVA polymer networks. Interestingly, PVA-LMPs exhibited electrically mechanically ability. Moreover, hydrogel can be fabricated as which accurately monitor activities. Additionally, dissolvable, showing an attractive on demand transient electronics. It is demonstrated that hydroxyl groups stabilize via hydrogen-bonding interactions. Furthermore, dynamic cross-linking bonds between rupture coalesce reversibly network, endow both This work shows potential constructing next-generation multifunctional hydrogel-based monitoring, healthcare diagnosis, portable electronics, robot tactile systems.

Language: Английский

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All‐Printed Flexible and Stretchable Electronics with Pressing or Freezing Activatable Liquid‐Metal–Silicone Inks

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 30(3)

Published: Oct. 16, 2019

Abstract Liquid‐metal (LM)‐based flexible and stretchable electronics have attracted widespread interest in wearable computing, human–machine interaction, soft robotics. However, many current examples are one‐off prototypes, whereas future implementation requires mass production. To address this critical challenge, an integrated multimaterial 3D printing process composed of direct ink writing (DIW) sealing silicone elastomer special LM‐silicone (LMS) inks for manufacturing high‐performance LM‐based is presented. The LMS a concentrated mixture LM microdroplets exhibits excellent printability DIW printing. Guided by verified theoretical model, with high resolution speed can be easily implemented. Although not initially conductive, it activated pressing or freezing. Activated possesses good conductivity significant electrical response to strain. Owing LMS's unique structure, LMS‐embedded exhibit great damage mitigation, that no leaking occurs even when damaged. demonstrate the flexibility fabricating electronics, multilayer circuits, strain sensors, data gloves printed investigated. Notably, utilizing activating property, some functional circuits such as one‐time pressing/freezing‐on switch without any structural design.

Language: Английский

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Liquid Metal Supercooling for Low‐Temperature Thermoelectric Wearables

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 29(45)

Published: Sept. 6, 2019

Abstract Elastomers embedded with droplets of liquid metal (LM) alloy represent an emerging class soft multifunctional composites that have potentially transformative impact in wearable electronics, biocompatible machines, and robotics. However, for these applications it is crucial LM alloys to remain during the entire service temperature range order maintain high mechanical compliance throughout duration operation. Here, LM‐based functional do not freeze stretchable at extremely low temperatures are introduced. It shown confinement micro‐/nanometer length scales significantly suppresses their freezing (down −84.1 from −5.9 °C) melting point −25.6 +17.8 independent choice matrix material processing conditions. Such a supercooling effect allows inclusions preserve fluidic nature stretch surrounding polymer without introducing significant resistance. These results indicate highly stabilized can operate over wide open up new possibilities materials, which demonstrated self‐powered thermoelectric devices bio‐sensing personal health monitoring temperatures.

Language: Английский

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Liquid Metal–Based Soft Microfluidics

Small, Journal Year: 2019, Volume and Issue: 16(9)

Published: Oct. 1, 2019

Abstract Motivated by the increasing demand of wearable and soft electronics, liquid metal (LM)‐based microfluidics has been subjected to tremendous development in past decade, especially robotics, related fields, due unique advantages LMs that combines conductivity deformability all‐in‐one. can be integrated as core component into microfluidic systems form either droplets/marbles or composites embedded polymer materials with isotropic anisotropic distribution. The LM are found have broad applications deformable antennas, diodes, biomedical sensing chips, transient circuits, mechanically adaptive materials, etc. Herein, recent progress LM‐based their potential summarized. current challenges toward industrial future research orientation this field also summarized discussed.

Language: Английский

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Liquid Metal‐Based Soft Electronics for Wearable Healthcare

Advanced Healthcare Materials, Journal Year: 2021, Volume and Issue: 10(17)

Published: March 16, 2021

Wearable healthcare devices have garnered substantial interest for the realization of personal health management by monitoring physiological parameters individuals. Attaining integrity between and biological interfaces is one greatest challenges to achieving high-quality body information in dynamic conditions. Liquid metals, which exist liquid phase at room temperatures, are advanced intensively as conductors deformable because their excellent stretchability self-healing ability. The unique surface chemistry metals allows development various sensors wearable form. Also, biocompatibility verified through numerous biomedical applications, holds immense potential uses on inside a living body. Here, recent progress metal-based electronic with respect featured properties processing technologies discussed. Representative examples applications such biosensors, neural interfaces, soft interconnection reviewed. current prospects further also discussed, future directions advances latest research explored.

Language: Английский

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