scholarly journals Ultrastretchable Strain Sensors Using Carbon Black-Filled Elastomer Composites and Comparison of Capacitive Versus Resistive Sensors

2017 ◽  
Vol 3 (3) ◽  
pp. 1700284 ◽  
Author(s):  
Jun Shintake ◽  
Egor Piskarev ◽  
Seung Hee Jeong ◽  
Dario Floreano
Keyword(s):  
Carbon Black ◽  
Strain Sensors ◽  
Filled Elastomer ◽  
Elastomer Composites

Embedded large strain sensors with graphene-carbon black-silicone rubber composites

2018 ◽  
Vol 282 ◽  
pp. 206-214 ◽  
Author(s):  
Agee Susan Kurian ◽  
Velram Balaji Mohan ◽  
Debes Bhattacharyya
Keyword(s):  
Carbon Black ◽  
Silicone Rubber ◽  
Large Strain ◽  
Strain Sensors ◽  
Rubber Composites

Experimental Technique to Estimate Interfacial Properties of Mechanoluminescent Particles in an Elastomer Matrix

2019 ◽  
Author(s):  
Srivatsava Krishnan ◽  
Noriko Katsube ◽  
Vishnu baba Sundaresan
Keyword(s):  
Experimental Technique ◽  
Material Properties ◽  
Cohesive Zone ◽  
Light Emission ◽  
Volume Fraction ◽  
Piecewise Linear ◽  
Image Correlation ◽  
Cohesive Zone Modeling ◽  
Filled Elastomer ◽  
Elastomer Composites

Abstract Mechanoluminescent-particulate filled composites have been gaining significant interest for light generation, stress visualization, health monitoring, damage sensing and pressure mapping applications. Previous works on stress-dependence of light emission have modeled emission intensity as a function of macroscopic composite stress. While this approach may suffice from an application point of view, the resulting model may not represent the mechanoluminescence phenomenon accurately. This is because in particulate filled elastomer composites, particulate stresses can be significantly different from matrix and macroscopic stresses, especially in composites with moderate and low filler volume fraction. Experimental difficulty in measuring stresses within micron-sized particles necessitate micromechanical models that can connect macroscale measurements to microscale parameters through material properties. Apart from the material properties of the matrix and the particles, the bonding between the two dissimilar materials at their interface influences the stress transfer significantly. Cohesive zone modeling (CZM) approach defines the interface between particles and matrix as a piecewise linear stiffness element with possible degradation of stiffness beyond a certain strain. CZM provides a convenient way to not only predict particulate stress from macroscopic stress, but also to track interface damage and debonding. In this paper, we demonstrate an experimental technique to obtain cohesive zone parameters for mechanoluminescent-particulate filled elastomer composites, utilizing optical microscopy and Digital Image Correlation (DIC). CZM thus obtained can help predict particulate stresses and aid better modeling of the mechanoluminescence phenomenon. The experimental technique can also be easily adopted for other particulate-filled composites.

The Role of Filler Properties in the Creep Deformation of Filled Elastomers

1983 ◽  
Vol 56 (2) ◽  
pp. 465-480
Author(s):  
J. L. Thiele ◽  
R. E. Cohen
Keyword(s):  
Carbon Black ◽  
Creep Deformation ◽  
High Strain ◽  
Filled Elastomers ◽  
Filled Elastomer ◽  
Strain Mechanism ◽  
Sensitive Tool ◽  
Strain Induced Crystallization ◽  
Induced Crystallization

Abstract The use of the creep T-jump experiment as a sensitive tool for elucidating the mechanistic behavior during the deformation of a complex material such as the carbon black filled elastomer has been illustrated. The activation energy for creep was determined as a function of stress for various vulcanizates. The effects of the choice of elastomer, and of variations in surface chemistry, structure, and loading of the filler, were studied. The T-jump results combined with electrical conductivity measurements confirmed the presence of a carbon black network which is considerably involved in the creep deformation process at low strain but not at high strain. In NR vulcanizates, there is a high-strain mechanism not observed in SBR vulcanizates; presumably strain-induced crystallization is responsible for the NR behavior. Oxidation of filler surfaces had essentially no effect on the creep deformation mechanisms, suggesting that, during creep, slippage of elastomers along the surface does not occur to any great extent for conventional or oxidized surfaces.

Piezoresistive epoxy resin films with carbon black particles for small-strain sensors

2019 ◽  
Vol 77 (7) ◽  
pp. 3725-3734
Author(s):  
Dionatas Hoffmann Andreghetto ◽  
Gilberto de Campos Fuzari
Keyword(s):  
Carbon Black ◽  
Epoxy Resin ◽  
Small Strain ◽  
Strain Sensors

scholarly journals Thermal Analysis and SEM Microscopy Applied to Studying the Efficiency of Ionic Liquid Immobilization on Solid Supports

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1579 ◽  
Author(s):  
Anna Sowińska ◽  
Magdalena Maciejewska ◽  
Laina Guo ◽  
Etienne Delebecq
Keyword(s):  
Thermal Analysis ◽  
Ionic Liquid ◽  
Carbon Black ◽  
Surface Reactivity ◽  
Solid Supports ◽  
Sem Images ◽  
Elastomeric Matrix ◽  
Dispersion Degree ◽  
Conductive Additives ◽  
Elastomer Composites

Ionic liquids (ILs) are widely used in elastomer composites, primarily as vulcanization activators or accelerators, crosslinkers, conductive additives, or dispersing agents of fillers. The aim of this work was to study the efficiency of ionic liquid immobilization on filler surfaces using different techniques of thermal analysis and scanning electron microscopy (SEM). Ionic liquid, such as 1-decyl 3-methylimidazolium bromide (DmiBr) was grafted on the surface of silica, calcium oxide, and carbon black to improve the dispersion degree of their particles in the elastomeric matrix. Thermal analysis and SEM microscopy revealed a key role in determining the efficiency of the filler modification with ILs dissolved in acetone. Identifying the weight loss associated with thermal decomposition of DmiBr in modified fillers, allowed the calculation of the efficiency of their modification and compare the surface reactivity of studied fillers with DmiBr. Silica and carbon black exhibited high and comparable ability for interaction with ionic liquid. SEM images showed that particles of DmiBr-modified fillers were quite homogeneously dispersed in the elastomer matrix and exhibited good adhesion to the elastomer.

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