Soft while strong mechanical shock tolerable e-skins

Wang, Yanan; Hao, Baicun; Wang, Yujia; Wei, Yingjie; Huang, Xin; Shi, Bi

doi:10.1039/d1ta10746a

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…These can be achieved by rearranging collagen and combining it with conductive substances, such as carbon nanotubes, interdigital electrodes, silver nanowires [193], and graphene [194]. For example, the e-skin was created by embedding an elastic non-Newtonian gel into the collagen fiber sponge, followed by assembly with an interdigital electrode [195]. By imitating the protective effect of natural skin, the as-prepared e-skin displayed flexibility when in a relaxed state, yet increased in rigidity when encountering shocks, with a reduced peak force of 76.5% and an extended buffer time of 455%.…”

Section: Smart-healthcare Devicesmentioning

confidence: 99%

Structure, extraction, processing, and applications of collagen as an ideal component for biomaterials - a review

et al. 2023

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Collagen with a multi-hierarchical architecture exhibits powerful biological performance, thus being developed in biomedical applications as a processing building block. The isolated collagen after extraction from biological tissues can be processed into various forms such as fibrils, scaffolds, membranes, microspheres, hydrogels, and sponges for further use in specific applications. This review briefly discusses the multi-hierarchical structure, powerful biological performances, extraction, and processing approaches of collagen as a natural biomaterial. The processing of collagen including dissolution, self-assembly, cross-linking, and electrospinning, is discussed to show more feasibility for specific applications of collagen composite biomaterials. Further emphasis is directed towards the biomedical applications of drug and gene delivery, as well as tissue repair involving bone, cartilage, vascular, and corneal, along with wound healing. Additionally, there is a focus on the development of flexible sensors and electronic skins (e-skins). Furthermore, the potential challenges and perspectives for the development of collagen-based biomaterials are proposed. In short, collagen-based biomaterials are expected to facilitate sustainable development and the next generation of advanced biomaterial applications. Graphical Abstract

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Section: Smart-healthcare Devicesmentioning

confidence: 99%

Structure, extraction, processing, and applications of collagen as an ideal component for biomaterials - a review

et al. 2023

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“…The mechanical impact extensively performs on ground vehicles [1], aircraft [2,3] and spacecraft [4] etc [5,6], arising undesirable influences on anticipant working conditions. Therefore, highly-efficient mitigation materials are in great need to reduce the risk of impact loads [7,8].…”

Section: Introductionmentioning

confidence: 99%

High-velocity micromorphological observation and simulation of magnetorheological gel using programmable magneto-controlled microfluidics system and micro-tube dynamic models

Yu,

Gan,

et al. 2024

Smart Mater. Struct.

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Application of magnetorheological gel (MRG) is a promising tool for high performance mitigation due to its outstanding energy absorption and dissipation properties. However, the lack of recognition on micromorphological variation for MRG and its magneto-mechanical coupling mechanism limits its extensive application. Herein, combined with the magnetic sensitivity nature of MRG, we develop a magneto-controlled microfluidic system for flexible simulation towards ms-level impact conditions. Microstructural changes of MRG, prepared with solid-liquid composite method, are characterized from variable magnet-field setups and gradual velocities. Experiments reveal that the increasing magnetic flux density can effectively enhance the stability of chains in as-fabricated MRG, while the chains can support excessive velocities up to 4.5 m/s before breaking. Meanwhile, under the preset velocity range, the maximum change rates of the average and standard deviation for inclinations are 183.71% and 40.06%, respectively. Successively, an experiment-conducted microdynamic model is developed for numerical simulation of the MRG mechanical behaviors. During that, high-velocity MRG behaviors are explored with a tubular rather than regular flat-structure boundary condition setups, to pursue more trustable results. Simulation readouts meet nicely with those from experiments in revealing the magneto-mechanical coupling mechanism of MRG under multiphysics. The interaction between magnetic force, repulsive force and viscous resistance is mainly illustrated. This work provides a reliable observation basis for micromorphological variation of MRG, also suggests a new method for the mechanism of magneto-mechanical coupling at extreme velocities.

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“…Natural animal skin is a renewable biomass with collagen as the main component and with hierarchical collagen fibers of 3D as the main network structure, which has the advantages of high strength, flexibility, bio‐friendliness, and an extensive range of sources, [ 16,17 ] and is widely used in biomedical materials, [ 18 ] food, [ 19 ] cosmetic, [ 20 ] and leather industry. [ 21 ] Traditionally, animal skin is utilized to extract type I collagen molecules.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional, Ultra‐Tough Organohydrogel E‐Skin Reinforced by Hierarchical Goatskin Fibers Skeleton for Energy Harvesting and Self‐Powered Monitoring

Fan

Tao

2023

Adv Funct Materials

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E‐skins based on conductive hydrogels are regarded as ideal candidates for sensing application. However, limited by the constructed materials and strategies, the current conductive hydrogels have poor mechanical properties, single function, and unsatisfactory conductivity, which seriously hinder their development and application. Herein, the natural goatskin with hierarchical 3D network structure weaved by collagen fibers is used as the substrate material for the construction of ultra‐tough hydrogel through a “top‐down” strategy, in which acrylic acid monomer is first vacuum‐impregnated into the interstices of goatskin fibers skeleton and is then polymerized in situ to produce the skin‐based hydrogel with unique 3D wrapping structure. Based on the skin‐based hydrogel, a substrate with load‐carrying capacity, after loaded with a new multifunctional nanoscale‐conductive medium nanosilver particles (AgNPs) and 1,3‐propanediol, a goatskin‐derived multifunctional organohydrogel S@HCP is constructed with excellent mechanical properties, self‐adhesion, transparency, ultraviolet shielding, antibacterial, biocompatibility, environmental stability, and conductivity. Notably, the stretchable S‐TENG assembled using S@HCP can be perfectly suited for real‐life applications including biomechanical energy harvesting, self‐powered tactile‐sensing, and motion monitoring. It is believed that, by combining natural animal skin with different functional materials, it is possible to reuse animal skin, “dead skin,” which provides a new platform for developing multifunctional flexible e‐skin.

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Soft while strong mechanical shock tolerable e-skins

Abstract: Mechanical shock tolerance is of significance in developing high-performance e-skins. Herein, we report mechanical shock tolerable (MST) e-skins that spontaneously mimic the protection and sensing functions of natural skin. The...

Cited by 9 publications

References 29 publications

Structure, extraction, processing, and applications of collagen as an ideal component for biomaterials - a review

Structure, extraction, processing, and applications of collagen as an ideal component for biomaterials - a review

High-velocity micromorphological observation and simulation of magnetorheological gel using programmable magneto-controlled microfluidics system and micro-tube dynamic models

Multifunctional, Ultra‐Tough Organohydrogel E‐Skin Reinforced by Hierarchical Goatskin Fibers Skeleton for Energy Harvesting and Self‐Powered Monitoring

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