Strain/deformation-insensitive wearable rubber composite for temperature monitoring based on the photothermal and thermoelectric conversion

Zheng, Zhongjie; Yu, Zhiyu; Kong, Lingli; Lin, Baofeng; Fu, Lihua; Xu, Chuanhui

doi:10.1016/j.cej.2024.149329

Cited by 5 publications

(1 citation statement)

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“…Composite materials that combine electrical conductivity and elastic properties have been intensively studied in recent years. , The main interest in these composite materials is their piezoresistivity, that is, the capacity to change electrical resistance in response to the application of mechanical stress that causes deformation. Piezoresistive materials are useful for manufacturing the sensing elements of sensor devices or indicators of strain, replacing the traditionally used metal strain gauges. The main advantage of composites over metal strain gauges is their flexibility, which allows for potential applications in coating structures or devices that are implanted in organic environments.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Strain Sensors Based on Poly(acrylonitrile-co-butadiene) and Polypyrrole Synthesized by the Diffusion Method

Encinas-Encinas,

Castillo-Ortega,

del Castillo-Castro

et al. 2024

ACS Omega

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In this study, the functionality of an elastomer composite material containing polypyrrole (PPy) as a stress sensor was evaluated. The material was prepared using the swelling method by diffusing the pyrrole monomer into the elastomer before polymerization. To achieve adequate diffusion, organic solvents with affinity for the elastomer were used. The resulting materials were characterized by scanning electron microscopy (SEM), surface electrical resistance, and thermal and mechanical properties for application as a stress sensor. The simultaneous change in electrical resistance and tension stress was measured using a digital multimeter with electrodes connected to the jaws of a universal mechanical testing machine. The influence of stress cycles on the piezoresistivity of the composite materials was investigated. The obtained PPy/NBR composite presented a good combination of electrical conductivity and mechanical properties. The strain at break remained with mild variation after coating with PPy.

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