scholarly journals A mechanically and electrically self-healing graphite composite dough for stencil-printable stretchable conductors

2016 ◽  
Vol 4 (19) ◽  
pp. 4150-4154 ◽  
Author(s):  
Tongfei Wu ◽  
Biqiong Chen
Keyword(s):  
Self Healing ◽  
Ambient Conditions ◽  
Graphite Composite ◽  
Stretchable Conductors ◽  
Highly Stretchable ◽  
Stretchable Conductor

A graphite composite dough exhibited rapid mechanically and electrically self-healing properties under ambient conditions and showed potential for highly stretchable conductor applications.

Self-healing and stretchable conductor based on embedded liquid metal patterns within imprintable dynamic covalent elastomer

2022 ◽  
Author(s):  
Xiaoliang Chen ◽  
Peng Sun ◽  
Hongmiao Tian ◽  
Xiangming Li ◽  
Chunhui Wang ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Electronic Devices ◽  
Electronic Systems ◽  
Self Healing ◽  
Next Generation ◽  
Critical Elements ◽  
Stretchable Conductors ◽  
Stretchable Conductor

Flexible and stretchable conductors are critical elements for constructing soft electronic systems and have recently attracted tremendous attention. Next generation electronic devices call for self-healing conductors that can mimic the...

Enhanced Conductivity in Highly Stretchable Silver and Polymer Nanocomposite Conductors

2021 ◽  
Vol 21 (6) ◽  
pp. 3218-3226
Author(s):  
Hyun Jin Nam ◽  
Young Sun Kim ◽  
Yoon Jin Kim ◽  
Su-Yong Nam ◽  
Sung-Hoon Choa
Keyword(s):  
Ag Nanoparticles ◽  
Polymer Nanocomposite ◽  
Point Of View ◽  
Intense Pulse Light ◽  
Mixing Ratios ◽  
Flat Type ◽  
Stretchable Conductors ◽  
Highly Stretchable ◽  
Stretchable Conductor ◽  
Enhanced Conductivity

In stretchable conductors, there is a trade-off relationship between the stretchability and conductivity which makes it difficult to increase both properties simultaneously. From a practical point of view, however, high conductivity is a more important parameter for real-world applications of wearable and mobile electronics. To obtain a highly conductive stretchable conductor, we developed a stretchable conductor composed of silver (Ag) flat-type microparticles, Ag nanoparticles and a polyester binder. The printed stretchable conductor was then sintered using the intense pulse light sintering technique. The effects of different mixing ratios of Ag flat-type particles and nanoparticles on dispersibility, printability, surface properties, conductivity, and stretchability were examined. Increasing the content of Ag-flat type particles in the composite improved dispersibility, printability, and conductivity. The stretchable conductor exhibited the outstanding conductivity of 5.5×106 S/m. Increasing the Ag nanoparticles content increased the stretchability of the conductor. As the nanoparticle content increased to 30%, the stretchable conductor showed the excellent stretchability of 210%, and withstood 2,600 repeated stretching cycles at a fixed tensile strain of 50%. The conductors also exhibited superb foldability during 10,000 repeated folding tests, up to a radius of 1 mm, without any failures.

scholarly journals Rapid synchronized fabrication of vascularized thermosets and composites

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mayank Garg ◽  
Jia En Aw ◽  
Xiang Zhang ◽  
Polette J. Centellas ◽  
Leon M. Dean ◽  
...  
Keyword(s):  
Large Scale ◽  
Capillary Flow ◽  
External Heat ◽  
Frontal Polymerization ◽  
Self Healing ◽  
Vascular Networks ◽  
Ambient Conditions ◽  
External Energy ◽  
Imaging Phantoms ◽  
Vascular Structures

AbstractBioinspired vascular networks transport heat and mass in hydrogels, microfluidic devices, self-healing and self-cooling structures, filters, and flow batteries. Lengthy, multistep fabrication processes involving solvents, external heat, and vacuum hinder large-scale application of vascular networks in structural materials. Here, we report the rapid (seconds to minutes), scalable, and synchronized fabrication of vascular thermosets and fiber-reinforced composites under ambient conditions. The exothermic frontal polymerization (FP) of a liquid or gelled resin facilitates coordinated depolymerization of an embedded sacrificial template to create host structures with high-fidelity interconnected microchannels. The chemical energy released during matrix polymerization eliminates the need for a sustained external heat source and greatly reduces external energy consumption for processing. Programming the rate of depolymerization of the sacrificial thermoplastic to match the kinetics of FP has the potential to significantly expedite the fabrication of vascular structures with extended lifetimes, microreactors, and imaging phantoms for understanding capillary flow in biological systems.

scholarly journals Ultrarobust, tough and highly stretchable self-healing materials based on cartilage-inspired noncovalent assembly nanostructure

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuyan Wang ◽  
Xin Huang ◽  
Xinxing Zhang
Keyword(s):  
Spider Silk ◽  
Self Healing ◽  
High Toughness ◽  
Healing Efficiency ◽  
Strong Interfacial Interaction ◽  
Highly Stretchable ◽  
Noncovalent Bonds ◽  
Actuation Devices ◽  
Noncovalent Bonding ◽  
Polyurethane Matrix

AbstractSelf-healing materials integrated with excellent mechanical strength and simultaneously high healing efficiency would be of great use in many fields, however their fabrication has been proven extremely challenging. Here, inspired by biological cartilage, we present an ultrarobust self-healing material by incorporating high density noncovalent bonds at the interfaces between the dentritic tannic acid-modified tungsten disulfide nanosheets and polyurethane matrix to collectively produce a strong interfacial interaction. The resultant nanocomposite material with interwoven network shows excellent tensile strength (52.3 MPa), high toughness (282.7 MJ m‒3, which is 1.6 times higher than spider silk and 9.4 times higher than metallic aluminum), high stretchability (1020.8%) and excellent healing efficiency (80–100%), which overturns the previous understanding of traditional noncovalent bonding self-healing materials where high mechanical robustness and healing ability are mutually exclusive. Moreover, the interfacical supramolecular crosslinking structure enables the functional-healing ability of the resultant flexible smart actuation devices. This work opens an avenue toward the development of ultrarobust self-healing materials for various flexible functional devices.

A Highly Stretchable, Self-Healing Elastomer with Rate Sensing Capability Based on a Dynamic Dual Network

2021 ◽  
Vol 13 (7) ◽  
pp. 9043-9052
Author(s):  
Peiyao Qu ◽  
Chi Lv ◽  
Yuhao Qi ◽  
Lu Bai ◽  
Junping Zheng
Keyword(s):  
Self Healing ◽  
Highly Stretchable

Non-covalent assembly of a super-tough, highly stretchable and environmentally adaptable self-healing material inspired by nacre

2021 ◽  
Vol 9 (36) ◽  
pp. 20737-20747
Author(s):  
Xiaobo Zhu ◽  
Wenru Zheng ◽  
Haichao Zhao ◽  
Liping Wang
Keyword(s):  
Mechanical Strength ◽  
Self Healing ◽  
Highly Stretchable

Inspired by nacre, a super-tough self-healing material with a reverse nacre structure and interwoven network was prepared, which solved the contradiction between fast self-healing ability and good mechanical strength of traditional PU materials.

An ultra-low hysteresis, self-healing and stretchable conductor based on dynamic disulfide covalent adaptable networks

2022 ◽  
Author(s):  
weibo kong ◽  
Yunyun Yang ◽  
Yanjun Wang ◽  
Hongfei Cheng ◽  
Peiyao Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Health Monitoring ◽  
Self Healing ◽  
Soft Robots ◽  
Stretchable Conductor

Stretchable self-healing conductors can autonomously restore their electrical and mechanical properties after experiencing damage, thus being valuable in the application of prostheses, soft robots, and health monitoring. Currently, most reported...

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