Magneto‐piezoresistive characteristics of graphene/room temperature vulcanized silicon rubber<scp>‐silicon</scp> rubber magnetorheological elastomer

Zhao, Dan; Cui, Jin; Dai, Xinying; Liu, Shaogang; Dong, Liqiang

doi:10.1002/app.50051

Cited by 12 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The working principle of the prepared sensor is based on the permeation theory and the tunneling current effect [ 28 , 29 ], as the conductive nanocomposite material was prepared by adding conductive nanomaterials into the silicone rubber, where a conductive network path would be generated in the nanocomposite. The generation of a conductive network path is sensitive to application of pressure and has a low resistance.…”

Section: Resultsmentioning

confidence: 99%

Piezo-Resistive Flexible Pressure Sensor by Blade-Coating Graphene–Silver Nanosheet–Polymer Nanocomposite

Zheng

Li²,

Zhao³

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

The demand for flexible pressure sensors in wearable devices is dramatically increasing. However, challenges still exist in making flexible pressure sensors, including complex or costly fabrication processes and difficulty in mass production. In this paper, a new method is proposed for preparing the flexible pressure sensors that combines an imprinting technique with blade-coating of a graphene–silver nanosheet–polymer nanocomposite. The piezo-resistive type flexible pressure sensor consists of interdigital electrodes and nanocomposite as a sensing layer, as well as a micropillar array structure. The morphology of the sensitive layer of the sensor is characterized by scanning electron microscopy (SEM). The response performance, sensitivity, and stability of the sensor are investigated. The test results show that the initial resistance of the pressure sensor is only 1.6 Ω, the sensitivity is 0.04 kPa−1, and the response time is about 286 ms. In addition, a highly hydrophobic wetting property can be observed on the functional structure surface of the sensor. The contact angle is 137.2 degrees, revealing the self-cleaning property of the sensor. Finally, the prepared sensor is demonstrated as a wearable device, indicating promising potential in practical applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Piezo-Resistive Flexible Pressure Sensor by Blade-Coating Graphene–Silver Nanosheet–Polymer Nanocomposite

Zheng

Li²,

Zhao³

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Since graphene is a two-dimensional material, its volume cannot be calculated when modelling the material, so the relative permittivity of GR/RTV-MRE cannot be investigated directly through theoretical modelling. Therefore, in this section, we first establish the MRE relative permittivity calculation model based on effective medium theory, 18 combine the material simulation software VASP 19 with the solved MRE relative permittivity, set the graphene characteristic properties, and obtain the GR/RTV-MRE relative permittivity with different graphene contents.…”

Section: Calculation Of the Relative Permittivity Of Gr/rtv-mrementioning

confidence: 99%

Pressure sensing properties for the dielectric layer of graphene/silicone rubber‐based magnetorheological elastomer

Zhang

Liu

Zhao

et al. 2022

Polymer International

Self Cite

View full text Add to dashboard Cite

In order to expand the application of magnetorheological elastomers (MREs) in the field of sensor technology and improve their dielectric properties, a type of MRE with modified graphene, graphene/silicone rubber‐based magnetorheological elastomer (GR/RTV‐MRE), is proposed and its dielectric sensing properties were investigated. A model for calculating the relative permittivity of MRE was developed and combined with VASP software simulation to obtain the relative permittivity of GR/RTV‐MRE with different graphene contents. Combining the silicone rubber matrix with 30 vol% micro‐sized (ca 3.5 μm) spherical carbonyl iron particles, GR/RTV‐MRE samples with different graphene contents were prepared and tested for their relative permittivity. There is an error of approximate 7% between the test results and the simulation results, and the relative permittivity of GR/RTV‐MRE with a graphene content of 3 vol% reaches a maximum value of 35.400. An experimental platform for compressive properties was constructed and the compressive modulus of GR/RTV‐MRE with a graphene content of 3 vol% was tested under a magnetic field of 0–1 T. The results show that the modulus of compressibility is positively correlated with the magnetic field intensity in the range 0–0.9 T, up to 3.98 MPa, and is almost constant in the range 0.9–1 T. GR/RTV‐MRE with a graphene content of 3 vol% was used as the dielectric of a capacitive type transducer. The sensitivity of the capacitive sensor was measured to be 0.07 kPa−1 with a linear fitting of 99.6%. It is shown that GR/RTV‐MRE with 3 vol% graphene has good dielectric sensing capability. © 2022 Society of Industrial Chemistry.

show abstract

“…In recent years, it has been shown that the addition of conductive fillers, such as graphene or CNTs to MREs, also provides them with unique mechanical and electrical properties. This favors their applicability due to the coupling of different physical properties such as mechanical with electrical and/or magnetic properties. , As a first consequence, devices based on these MRE/conductive filler composites have been developed for areas including flexible electronics or self-sensing systems for damping and noise limitation. , Nevertheless, although initial progress has been made in the development of MREs with additional functionalities, further research is needed to understand and optimize those materials as this will allow expanding its scope of application in areas such as IoT-compatible complex systems or biocompatible microfluidic devices …”

Section: Introductionmentioning

confidence: 99%

Ternary Multifunctional Composites with Magnetorheological Actuation and Piezoresistive Sensing Response

Fernández Maestu,

García Díez,

Tubio

et al. 2023

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

Advances in the development and implementation of magnetorheological elastomers (MREs) have demonstrated their potential for vibration control and damping, among others. To increase further the applicability of MREs, the present work reports on MREs with piezoresistive self-sensing characteristics by adding conductive fillers. Multifunctional MREs are thus reported based on the styrene–ethylene–butylene–styrene (SEBS) polymer matrix with embedded Fe3O4 nanoparticles as magnetically responsive materials and multiwalled carbon nanotubes (MWCNT) as conductive fillers. Specifically, SEBS-based composites with a constant 20 wt % Fe3O4 content and different concentrations of MWCNT have been prepared. The effect of MWCNT addition on the morphological, mechanical, electrical, magnetorheological, and piezoresistive properties of the MRE-based composites was explored. Increasing MWCNT filler content leads to an increase of the Young’s modulus and maximum elongation of the composite. All samples show a notable MR effect, a maximum MR response of 9% being obtained for the 5 wt % MWCNT sample. Moreover, the addition of MWCNT leads to an increase of the electrical conductivity of the composite by 12 orders of magnitude, with a percolation threshold around 0.17 wt % MWCNT. Further, a maximum piezoresistive response characterized by a gauge factor of 6.5 is obtained for the composite with 5 wt % MWCNT content. The developed ternary multifunctional materials that combine simultaneously magnetorheological and piezoresistive properties represent a generation of magnetorheological actuators with self-sensing deformation capability.

show abstract

Magneto‐piezoresistive characteristics of graphene/room temperature vulcanized silicon rubber‐silicon rubber magnetorheological elastomer

Cited by 12 publications

References 27 publications

Piezo-Resistive Flexible Pressure Sensor by Blade-Coating Graphene–Silver Nanosheet–Polymer Nanocomposite

Piezo-Resistive Flexible Pressure Sensor by Blade-Coating Graphene–Silver Nanosheet–Polymer Nanocomposite

Pressure sensing properties for the dielectric layer of graphene/silicone rubber‐based magnetorheological elastomer

Ternary Multifunctional Composites with Magnetorheological Actuation and Piezoresistive Sensing Response

Contact Info

Product

Resources

About