Stretchable Conductive Fibers of Ultra-high Tensile Strain and Stable Conductance Enabled by Worm-shape Graphene Microlayer.

Stretchable electrical conductors have demonstrated promising potentials in a wide range of wearable electronic devices, the conductivity of most of reported stretchable conductive fibers will be changed if be stretched or strained. But however, stable conductance is essential for wearable and stretchable device, to ensure the performance of wearable devices is stable. Inspired by the peristaltic behavior of arthropods, we designed a graphene coating similar to the caterpillar structure on the PU fiber surface, enabled by coating the worm-shape graphene microlayer onto polyurethane filaments. Such worm-shape filaments can be stretched up to 1010% with wide reversible electro-response range (04000 stretching/releasing cycles), good initial conductivity (σ0=124 S m-1) and high-quality factor (Q=11.26). Remarkably, the worm-shape filaments show distinctive strain-insensitive behavior (ΔR/R0<0.1) up to 220% strain. Furthermore, the filaments as electrical circuits of LED to track signals from robust human joint movements are also demonstrated for practical application. Such worm-shape filaments with distinctive strain-insensitive behavior provide a direct pathway for stretchy electronics.

[1]  Huisheng Peng,et al.  Hierarchically arranged helical fibre actuators driven by solvents and vapours. , 2015, Nature nanotechnology.

[2]  Seunghwa Ryu,et al.  Omnidirectionally and Highly Stretchable Conductive Electrodes Based on Noncoplanar Zigzag Mesh Silver Nanowire Arrays , 2016 .

[3]  Jooho Moon,et al.  A pre-strain strategy for developing a highly stretchable and foldable one-dimensional conductive cord based on a Ag nanowire network. , 2017, Nanoscale.

[4]  J. Cauich‐Rodríguez,et al.  TGA/FTIR studies of segmented aliphatic polyurethanes and their nanocomposites prepared with commercial montmorillonites , 2009 .

[5]  Hui‐Ming Cheng,et al.  Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition. , 2011, Nature materials.

[6]  Y. Arao,et al.  Mass production of high-aspect-ratio few-layer-graphene by high-speed laminar flow , 2016 .

[7]  Wei Zhang,et al.  Honeycomb‐Lantern‐Inspired 3D Stretchable Supercapacitors with Enhanced Specific Areal Capacitance , 2018, Advanced materials.

[8]  Fengjia Fan,et al.  Stretchable conductors based on silver nanowires: improved performance through a binary network design. , 2013, Angewandte Chemie.

[9]  Meiwu Shi,et al.  Flame retardant vinylon/poly(m-phenylene isophthalamide) blended fibers with synergistic flame retardancy for advanced fireproof textiles. , 2019, Journal of hazardous materials.

[10]  Benjamin C. K. Tee,et al.  An electrically and mechanically self-healing composite with pressure- and flexion-sensitive properties for electronic skin applications. , 2012, Nature nanotechnology.

[11]  I. Park,et al.  Highly stretchable and sensitive strain sensor based on silver nanowire-elastomer nanocomposite. , 2014, ACS nano.

[12]  T. Someya,et al.  Printable elastic conductors by in situ formation of silver nanoparticles from silver flakes. , 2017, Nature materials.

[13]  Mingwei Tian,et al.  Flexible all-solid planar fibrous cellulose nonwoven fabric-based supercapacitor via capillarity-assisted graphene/MnO2 assembly , 2019, Journal of Alloys and Compounds.

[14]  Yong Zhu,et al.  Highly Conductive and Stretchable Silver Nanowire Conductors , 2012, Advanced materials.

[15]  Lijun Qu,et al.  Enhanced electrothermal efficiency of flexible graphene fabric Joule heaters with the aid of graphene oxide , 2019, Materials Letters.

[16]  Zhibin Yu,et al.  User-interactive electronic skin for instantaneous pressure visualization. , 2013, Nature materials.

[17]  Benjamin C. K. Tee,et al.  Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes. , 2011, Nature nanotechnology.

[18]  Lijun Qu,et al.  Hydrodynamic alignment and microfluidic spinning of strength-reinforced calcium alginate microfibers , 2018, Materials letters (General ed.).

[19]  Lijun Qu,et al.  Scalable non-solvent-induced phase separation fabrication of poly(vinylidene fluoride) porous fiber with intrinsic flame-retardation and hydrophobic properties , 2018, Iranian Polymer Journal.

[20]  M. Lima,et al.  Elastomeric Conductive Composites Based on Carbon Nanotube Forests , 2010, Advanced materials.

[21]  K. Hata,et al.  A stretchable carbon nanotube strain sensor for human-motion detection. , 2011, Nature nanotechnology.

[22]  Hyung Keun Park,et al.  Metal Deposition on a Self‐Generated Microfibril Network to Fabricate Stretchable Tactile Sensors Providing Analog Position Information , 2018, Advanced materials.

[23]  Carter S. Haines,et al.  Hierarchically buckled sheath-core fibers for superelastic electronics, sensors, and muscles , 2015, Science.

[24]  Lijun Qu,et al.  Fast and facile graphene oxide grafting on hydrophobic polyamide fabric via electrophoretic deposition route , 2018, Journal of Materials Science.

[25]  S. Ko,et al.  Highly Stretchable or Transparent Conductor Fabrication by a Hierarchical Multiscale Hybrid Nanocomposite , 2014 .

[26]  Katsuaki Suganuma,et al.  Highly Conductive Ag Paste for Recoverable Wiring and Reliable Bonding Used in Stretchable Electronics. , 2018, ACS applied materials & interfaces.

[27]  Y. Arao,et al.  Efficient solvent systems for improving production of few-layer graphene in liquid phase exfoliation , 2017 .

[28]  Mingwei Tian,et al.  Highly sensitive wearable 3D piezoresistive pressure sensors based on graphene coated isotropic non-woven substrate , 2019, Composites Part A: Applied Science and Manufacturing.

[29]  Wenlong Cheng,et al.  Fractal Gold Nanoframework for Highly Stretchable Transparent Strain-Insensitive Conductors. , 2018, Nano letters.

[30]  Ivan Lee,et al.  Highly Sensitive, Wearable, Durable Strain Sensors and Stretchable Conductors Using Graphene/Silicon Rubber Composites , 2016 .

[31]  Sunho Jeong,et al.  3D-stacked carbon composites employing networked electrical intra-pathways for direct-printable, extremely stretchable conductors. , 2015, ACS applied materials & interfaces.

[32]  Benjamin C. K. Tee,et al.  Flexible polymer transistors with high pressure sensitivity for application in electronic skin and health monitoring , 2013, Nature Communications.

[33]  Kinam Kim,et al.  Highly stretchable electric circuits from a composite material of silver nanoparticles and elastomeric fibres. , 2012, Nature nanotechnology.