scholarly journals Conductive elastomer composites for fully polymeric, flexible bioelectronics

2019 ◽  
Vol 7 (4) ◽  
pp. 1372-1385 ◽  
Author(s):  
Estelle Cuttaz ◽  
Josef Goding ◽  
Catalina Vallejo-Giraldo ◽  
Ulises Aregueta-Robles ◽  
Nigel Lovell ◽  
...  
Keyword(s):  
Elastomer Composites ◽  
Conductive Elastomers

Soft, flexible and stretchable conductive elastomers made of polyurethane and PEDOT:PSS blends were fabricated into fully polymeric implantable bioelectrode arrays.

scholarly journals Electroplating and Ablative Laser Structuring of Elastomer Composites for Stretchable Multi-Layer and Multi-Material Electronic and Sensor Systems

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 255
Author(s):  
Simon P. Stier ◽  
Holger Böse
Keyword(s):  
Circuit Board ◽  
Stretchable Electronics ◽  
Electronic Components ◽  
Structured Design ◽  
Silicone Foam ◽  
New Concepts ◽  
Laser Structuring ◽  
Elastomer Composites ◽  
Conductive Elastomers ◽  
Metal Layers

In this work we present the concept of electroplated conductive elastomers and ablative multi-layer and multi-material laser-assisted manufacturing to enable a largely automated, computer-aided manufacturing process of stretchable electronics and sensors. Therefore, the layers (conductive and non-conductive elastomers as well as metal layers for contacting) are first coated over the entire surface (doctor blade coating and electroplating) and then selectively removed with a CO2 or a fiber laser. These steps are repeated several times to achieve a multi-layer-structured design. Is it not only possible to adjust and improve the work previously carried out manually, but also completely new concepts such as fine through-plating between the layers to enable much more compact structures become possible. In addition, metallized areas allow the direct soldering of electronic components and thus a direct connection between conventional and stretchable electronics. As an exemplary application, we have used the process for manufacturing a thin and surface solderable pressure sensor with a silicone foam dielectric and a stretchable circuit board.

Studying changes in the electrical resistance of carbon-nanotubes-modified elastomers during their compression, stretching and torsion

2019 ◽  
pp. 128-138
Author(s):  
V. S. Yagubov ◽  
A. V. Shchegolkov ◽  
A. V. Shchegolkov ◽  
N. R. Memetov
Keyword(s):  
Composite Material ◽  
Smart Materials ◽  
Electrical Resistance ◽  
Materials Science ◽  
Measuring System ◽  
Constant Current ◽  
Matrix Composition ◽  
Space Industry ◽  
Different Types ◽  
Elastomer Composites

Developing "smart" materials with improved both structural and functional characteristics is one of the promising areas of materials science. Measuring the electrical resistance of CNTs-modified (various mass contents) polymers and in particular, elastomers during performing several tests (compression, stretching, and torsion) at a constant current is relevant in electrical engineering, mechanical engineering, aviation, and space industry. Changes in the elastomer shape under different types of testing lead to the destruction of macromolecules and the structuring of the material as a whole. Therefore, it is important to study the effect of CNTsbased modifying fillers on the elastomer. When compressing, stretching or twisting the nano-modified elastomer, along with the mutual movement of its macromolecular fragments and aggregates, the modifier particles also move, which generally determines the transport of electrons in the resulting structure and affects the physical and mechanical parameters of the composite material. To conduct studies, elastomers containing different amounts of a CNTs-based modifying filler were prepared. To investigate and elucidate relevant dependencies, a measuring system (MS) was constructed, which makes it possible to determine electrical resistance values of the composite material with different CNTs contents in the polymer matrix composition exposed to various mechanical loads. Basing the research results, it was established that the electrical resistance of the elastomer composites modified with 1.0–2.5 wt.% CNTs decreases when compressing from 0 to 100 N, whereas when the compression force ranges from 100 to 350 N, the electrical resistance remains unchanged. When the elastomer composites modified with 2–2.5 wt.% CNTs were stretched by 30–40 %, the electrical resistance was found to increase from 5·103 to 1.9·107 Ω.

Microstructure and properties of cerium oxide/polyurethane elastomer composites

Rare Metals ◽  
2021 ◽  
Author(s):  
An Xie ◽  
Shen-Wei Mao ◽  
Tian-Jiang Chen ◽  
Hui Yang ◽  
Ming Zhang
Keyword(s):  
Cerium Oxide ◽  
Polyurethane Elastomer ◽  
Microstructure And Properties ◽  
Elastomer Composites

Magnetic Particle Reinforced Elastomer Composites for Additive Manufacturing

2021 ◽  
pp. 1-1
Author(s):  
Jungjin Park ◽  
Andrew Becnel ◽  
Alison B. Flatau ◽  
Norman Wereley
Keyword(s):  
Additive Manufacturing ◽  
Magnetic Particle ◽  
Elastomer Composites

The Mechanical Behavior of Short-Fiber-Elastomer Composites

1976 ◽  
Vol 49 (5) ◽  
pp. 1167-1181 ◽  
Author(s):  
A. Y. Coran ◽  
P. Hamed ◽  
L. A. Goettler
Keyword(s):  
Test Piece ◽  
Composite Plates ◽  
Short Fiber ◽  
Strength Properties ◽  
Unidirectional Composite ◽  
Short Fibers ◽  
Principal Stresses ◽  
Elastomer Composites ◽  
Ultimate Limit ◽  
Time Of Failure

Abstract The measured elastic and strength properties of angle-ply composites of short fibers and rubber depend on test-piece geometry. In general, higher tensile moduli and strengths are obtained when plies are both thin and wide. Once the effects of test-piece geometry are taken into account, elastic properties can be calculated as functions of the properties of a single ply. Classical compliance transformation equations can be used. However, because of the invariance of shear modulus in aligned composites, the tensor transformation equations are somewhat simplified. Tensile strengths of off-axis unidirectional composite plates and balanced-angle plies can be fitted by Hill's criterion. Unidirectional composites tend to fail in the weakest mode, depending on the angle of stress, but laminating causes all principal stresses in a ply to be near their ultimate limit at the time of failure.

Dielectric and microwave properties of elastomer composites loaded with carbon-silica hybrid fillers

2015 ◽  
Vol 133 (7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Ahmed A. Al-Ghamdi ◽  
Omar A. Al-Hartomy ◽  
Falleh R. Al-Solamy ◽  
Nikolay Dishovsky ◽  
Mihail Mihaylov ◽  
...  
Keyword(s):  
Microwave Properties ◽  
Hybrid Fillers ◽  
Elastomer Composites ◽  
Silica Hybrid

Effect of Triclosan on Self-Assembly of Alkyl Ammonium Surfactants Adsorbed within Montmorillonite Galleries in Silicone Elastomer Composites

2014 ◽  
Vol 338 (1) ◽  
pp. 45-53
Author(s):  
Christopher M. Liauw ◽  
Rebecca L. Taylor ◽  
Lindsey J. Munro ◽  
Arthur N. Wilkinson ◽  
Onanong Cheerarot
Keyword(s):  
Self Assembly ◽  
Silicone Elastomer ◽  
Elastomer Composites ◽  
Alkyl Ammonium
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