In situ coupled mechanical/electrical/WAXS/SAXS investigations on ethylene propylene diene monomer resin/carbon black nanocomposites

Beutier, Clémentine; Serghei, Anatoli; Cassagnau, Philippe; Heuillet, P.; Cantaloube, Bernard; Selles, Nathan; Morfin, Isabelle; Sudre, Guillaume; David, Laurent

doi:10.1016/j.polymer.2022.125077

Cited by 10 publications

(7 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several review articles detail the range of applications using this effect [9,15,16]. Despite the widespread awareness and utilization of this effect, a consensus as to the mechanisms underlying it has yet to emerge, with various works attributing it to volumetric change [15,17], particle reorientation [18][19][20], and network rearrangement and nanocavitation [21,22]. Phenomenological viscoelastic models have been successful in modelling the time dependent behaviour of the resistance [14,23], but a clear link between the viscoelasticity of the polymer and the time dependent piezoresistivity has not yet been established.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical characterization of piezoresistive carbon-elastomer composites

Ritchie,

Henke,

Pahl

et al. 2024

Electroactive Polymer Actuators and Devices (EAPAD) XXVI

View full text Add to dashboard Cite

Stretchable electronic conductors are an important class of material enabling electroactive polymer (EAP) research. One of the most common approaches to creating a stretchable conductor is to embed conductive particles within a nonconductive matrix material to create a composite with favourable electromechanical properties. Whether an EAP device employs these composites for specific functions like strain sensing or simply as deformable electronic interconnects, the interplay between mechanical deformation and electronic conductivity frequently emerges as a central concern. While these materials are simple to produce, the relationship between mechanical strain and changes in electrical resistivity (piezoresistivity) can be complex and difficult to predict, and the factors that influence this behaviour are not well understood. This study focused on the comprehensive electromechanical characterization of various samples of piezoresistive elastomer composites. The work examined how a range of factors such as filler loading, matrix material, strain properties, additives, and production methodologies affected the piezoresistive properties of these composites. This work identifies key factors that can affect the magnitude, time dependence, and even direction of piezoresistivity. By identifying important influencing factors, the results of this work are intended to assist researchers in designing materials that are best suited for their specific use case.

show abstract

Section: Introductionmentioning

confidence: 99%

Electromechanical characterization of piezoresistive carbon-elastomer composites

Ritchie,

Henke,

Pahl

et al. 2024

Electroactive Polymer Actuators and Devices (EAPAD) XXVI

View full text Add to dashboard Cite

show abstract

“…42 One mechanism put forth to explain this is that under strain, the elastomer material delaminates from the rigid filler particles, resulting in nanocavitation. 43 This allows for an increase in volume under strain to be observed for conductive composites, without violating the assumption of incompressibility for pure elastomers.…”

Section: Introductionmentioning

confidence: 99%

The incompressibility assumption and piezoresistivity in stretchable conductive composites

Ritchie,

Pahl,

Anderson

2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

Stretchable electronic conductors are vital components in soft robotics and flexible electronics. One method for producing these is combining conductive filler with a nonconductive elastomer. These composites commonly exhibit significant piezoresistivity. This work examines various mechanisms that may underlie this effect. These composites are generally analyzed through percolation theory, which describes the nonlinear relationship between filler volume fraction and conductivity. However, it is unclear whether percolation theory can explain their piezoresistivity or whether mechanisms such as rearrangement of the conductive network under deformation must be considered. This work compares volumetric change in the context of percolation theory against network rearrangement to examine the relative significance of these factors in determining piezoresistivity. Digital image correlation is utilized to investigate volumetric changes in carbon‐black silicone composites and finds that the typical assumption of incompressibility is reasonable, suggesting that volumetric changes alone cannot account for the behavior. A computational model is also developed, which implies that network rearrangement is likely a more significant factor and that interparticle interactions are crucial in understanding this effect. It was found that the most realistic modeling results were achieved only when both rigid and attractive interparticle interactions were accounted for in the model.

show abstract

“…While several studies have investigated the impact of processing conditions on the properties of activated carbon derived from specific biomass sources and have developed predictive equations for AC properties, there remains room for improvement in the field of biowaste-derived activated carbon synthesis. The utilization of X-ray scattering methods allows for the study of the nanoscale pore sizes present in ACs, providing valuable insights into their porous structure [7,8]. By comparing the experimental data obtained from XRD with results from X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption/desorption measurements, we can comprehensively analyze the porous structure of ACs derived from rice husks.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Activated Carbon from Rice Husk for Enhanced Energy Storage Devices

et al. 2023

View full text Add to dashboard Cite

The production of activated carbon (AC) from lignocellulosic biomass through chemical activation is gaining global attention due to its scalability, economic viability, and environmental advantages. Chemical activation offers several benefits, including energy efficiency, reduced carbonization time, and lower temperature requirements. In this study, potassium hydroxide (KOH) was employed for chemical activation, resulting in activated carbon with a high specific surface area of ~3050 m2/g. The structural analysis revealed the presence of graphitized carbon in the activated carbon matrix, accounting for over 15%. The X-ray diffraction (XRD) technique was employed to investigate the activated carbon derived from rice husk (RH). The potential applications of activated carbon obtained from rice husks through chemical activation were explored, including its use for heavy metal removal, elimination of organic pollutants, and as an active material in hybrid energy storage devices. Furthermore, a scaling methodology for the production of activated carbon was proposed, facilitating its industrial implementation.

show abstract

In situ coupled mechanical/electrical/WAXS/SAXS investigations on ethylene propylene diene monomer resin/carbon black nanocomposites

Cited by 10 publications

References 51 publications

Electromechanical characterization of piezoresistive carbon-elastomer composites

Electromechanical characterization of piezoresistive carbon-elastomer composites

The incompressibility assumption and piezoresistivity in stretchable conductive composites

Characterization of Activated Carbon from Rice Husk for Enhanced Energy Storage Devices

Contact Info

Product

Resources

About