Piezoresistive strain sensors based on psyllium-carbon nanostructure skeletons

Gong, Xuehui; Sang, Zhen; Guo, Haochen; Ke, Kai; Feke, Donald L.

doi:10.1016/j.compositesb.2021.108610

Cited by 15 publications

(3 citation statements)

References 62 publications

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“…[ 18 ] Gong et al reported a conductive filler composed of conductive carbon nanostructures and plantain, and obtained a strain sensor by infiltrating it in polydimethylsiloxane with a sensitivity of 4.5 (0–20% linear strain). [ 19 ] Although the piezoresistive strain sensor with high stretchability and sensitivity could be directly achieved by infilling conductive nanomaterials into elastomers, highly efficient and scalable fabrication method is still needed for the wide application of the devices.…”

Section: Introductionmentioning

confidence: 99%

3D Printed Reduced Graphene Oxide/Elastomer Resin Composite with Structural Modulated Sensitivity for Flexible Strain Sensor

et al. 2021

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High-performance flexible strain sensors with cost-effective and scalable fabrication methods are highly demanded for human-machine interfaces, soft robotics, and health monitoring. Herein, a digital light processing-based 3D printing method, which manufactures structures in a scalable and efficient layerby-layer manner, is developed to prepare a type of flexible strain sensors consisting of reduced graphene oxide/elastomer resin (RGO/ER) composite as the strain sensing element and RGO/ER composite with rhombic structure as the electrode. The RGO/ER composite as the sensing element has a sensitivity of 6.723 at a linear strain detection range from 0.01% to 40% and a high mechanical stability of more than 10 000 stretching-relaxing cycles. Furthermore, through the structural modulation, the sensitivity of the composite responding to mechanical deformation is modulated and suppressed, which can be used as the electrode for the strain sensor. The all-3D printed device with structurally modulated performance can be used for monitoring various human motions.

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Section: Introductionmentioning

confidence: 99%

3D Printed Reduced Graphene Oxide/Elastomer Resin Composite with Structural Modulated Sensitivity for Flexible Strain Sensor

et al. 2021

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“…The excellent piezoresistive mechanosensing performances of the PW aerogels (1.69-2.3) are superior or comparable to those of most of the cutting-edge aerogel mechanosensors within the similar strain ranges reported in the recent years. [42][43] The prominent linear behavior of PW 2h may be explained by the improved growth homogenization of the PPy NPs in it, because of the sufficient deposition time. The excellent sensitivities of PW 1h and PW 0.5 h are related to the higher increase rates of the conductive path numbers during compression, as observed from the comparison of the sheet resistance values across the samples (Figure 4d).…”

Section: Piezoresistive Performance Evaluationmentioning

confidence: 99%

Smart Wood Dual‐Action Off/On Versatile Switches Based On Highly Sensitive Electrical And Electromagnetic Mechanosensing Performances

Lan

Meng

et al. 2023

Advanced Sustainable Systems

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Smart electromagnetic (EM) functional materials that can arbitrarily utilize EM energy and reduce EM pollution are attractive for future EM devices in an information society; however, studies on precise EM interference (EMI) shielding and sensing are rare. In this work, dual‐action electrical and EM‐responsive mechanoreceptors are prepared from electrically conductive polypyrrole (PPy) nanoparticle (NP)‐infiltrated anisotropic wood (PW) aerogels. The prepared PW aerogels are composed of curved stacked layers of aligned cellulose nanofibers, and can be reversibly condensed and reconstructed for conductive network control during cyclic compression. These PW aerogels can withstand up to 74% compressive strain in a tangential direction and exhibit pressing‐enhanced electrical conductivity and polarization loss. The piezoresistive gauge factor (GF) and linearity of the PW aerogels can be adjusted by varying the PPy deposition time, leading to varying GF values in the range of 1.87–4.62. During mechanosensing based on EMI shielding effectiveness (SE), rapid off/on switching between the EM wave transmission and shielding is achieved when the SE varies above and below the effective EMI shielding area (>20 dB) through continuous compression. Such dual‐action electrical/EM off/on wood aerogel switches provide opportunities for the development of advanced smart devices from biomass resources.

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“…18,19 Based on graphene oxide (GO), reduced graphene oxide (rGO), and branched carbon nanotubes (CNS), a binary conductive skeleton can be constructed. [20][21][22][23][24][25][26][27] Special processing techniques can also improve the quality of the conductive network, which makes the composites exhibit higher conductive properties. Wu et al [28][29][30][31][32][33] further reduced the spacing between the conductive fillers by forcibly compacting the composites in a restricted space to obtain a dense conductive network, which further improves the conductive properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

A one step method to prepare polymer‐based flexible wires by continuous spatial‐confining network assembly technique

Jiang,

Li,

et al. 2024

J of Applied Polymer Sci

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In recent years, flexible electronics technology has been developing rapidly, and flexible electronic devices have been widely used in wearable gadgets and robotics. Flexible wires are the basic components of these devices, which usually consist of metallic materials with flexibility and ductility. However, the introduction of flexible conductive materials has broadened the application scope of flexible wires. In this paper, PDMS/SCF conductive composites exhibiting different conductivity properties on both sides are fabricated by adding meshes based on the continuous spatial‐confining network assembly method. The conductivity of PDMS/SCF (6 wt%) composites can be exhibited as 173.45 S/m in the conductive layer and 6.25 × 10−11 S/m in the insulating layer, which can be used as core and surface layers of conductors, respectively. A mathematical model is also developed to predict the electrical conductivity of the PDMS/SCF conductive composites, and the experimental data are in good agreement with the predicted results. This work provides a method for the continuous preparation of multifunctional composites that can be molded in one step with conductive layer and insulating layer, which can be used as the core and insulating layers of wires, thus simplifying the preparation process of composite‐based wires and expanding the range of conductive composites applications.

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Piezoresistive strain sensors based on psyllium-carbon nanostructure skeletons

Cited by 15 publications

References 62 publications

3D Printed Reduced Graphene Oxide/Elastomer Resin Composite with Structural Modulated Sensitivity for Flexible Strain Sensor

3D Printed Reduced Graphene Oxide/Elastomer Resin Composite with Structural Modulated Sensitivity for Flexible Strain Sensor

Smart Wood Dual‐Action Off/On Versatile Switches Based On Highly Sensitive Electrical And Electromagnetic Mechanosensing Performances

A one step method to prepare polymer‐based flexible wires by continuous spatial‐confining network assembly technique

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