Soft triboelectric generators by use of cost-effective elastomers and simple casting process

Haque, Rubaiyet Iftekharul; Farine, Pierre-André; Briand, D.

doi:10.1016/j.sna.2017.12.018

Cited by 22 publications

(14 citation statements)

References 24 publications

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“…EAPs have gained tremendous importance in the research community with a wide range of applications for their low mass, simple structure, low cost, robustness, large and complex actuation properties, and high energy density 5 . Large and complex actuations as a result of electro‐mechanical transducing of DEs are key factors in many engineering applications, such as, in soft robotics, sensors, energy harvesters, and artificial muscles 6,7,8,9,10 . At present, acrylic polymers, such as, VHB and silicone polymers are most commonly used DEs due to their favorable behavior under the application of an electric field 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Silicone composites cured under a high electric field: an electromechanical experimental study

2020

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Recently, dielectric elastomers (DEs) become enviable materials for the applications of electromechanical transducers. However, requirements of enhanced properties like high dielectric constants, low elastic moduli, high stretchability, and minimum viscous and dielectric losses are major challenges for actuator and generator applications. To enhance dielectric properties, particle‐filled DE can be prepared in the presence of an electric field during the curing process, which leads to aligned particles in a regular fashion. In this work, we develop a holistic experimental characterization approach to assess how particle alignments enhance mechanical, electrical and electro‐mechanical properties over the randomly particle filled composites. For that, a commercially available silicone polymer (Ecoflex) is used and filled with high dielectric constant barium titanate fillers. In order to substantiate electromechanical performance enhancements, mechanical, electrical, electro‐mechanical, and morphology experiments are conducted on both types of silicone composites. Dielectric composites prepared under an electric field during curing process outperform in almost all aspects of electromechanical tests. This comprehensive study provides a framework that will guide future dielectric composite preparations and electrical, mechanical, and electromechanical experiments especially for the oriented dipole fillers prepared under an electric field.

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Section: Introductionmentioning

confidence: 99%

Silicone composites cured under a high electric field: an electromechanical experimental study

2020

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“…The fabrication and the dimension of the active layers of the triboelectric devices are described in Figure S4 of the Supporting Information and are based on Haque et al Soft dielectric elastomers, polydimethylsiloxane (PDMS) (Sylgard 186, DowCorning), and electrically conductive carbon‐polyurethane (CPU), having opposite charge affinities were used as triboelectric layers. Electrically conductive carbon‐PDMS (CPDMS) was used as electrode for PDMS layer.…”

Section: Methodsmentioning

confidence: 99%

Triboelectric‐TFT Flip‐Flop for Bistable Latching of Dielectric Elastomer Actuators

Marette

Haque

et al. 2019

Adv Elect Materials

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A high‐voltage flip‐flop combining two self‐powered soft sensors with a flexible high‐voltage thin film transistor (HVTFT) is reported, and is used to electrically latch dielectric elastomer actuators (DEAs) in zero and high‐strain states. Two touch‐actuated triboelectric generators (TENGs) provide the gate input for the HVTFT that drives a DEA. One TENG is of positive polarity, while the other is of negative polarity, thus generating voltages either higher (100 V) or lower (−6 V) than the HVTFT threshold voltage. Used in a high‐voltage inverter configuration, there are two stable output voltage states, here 650 V (the “reset” state) and 50 V (the “set” state). The DEA is thus latched in one of two states, at 17.5% and 0% strain. The 650 V output is stable in time, while the 50 V state drifts up to 350 V after 10 s. Due to the highly nonlinear strain–voltage curve of the DEA, the drift of the output voltage in the “set” state leads only to a 2% increase of the DEA actuation strain in 10 s. By enabling bistable control of DEAs with TENGs, the TENG‐HVTFT latch paves the way toward soft robots with flexible embedded control circuitry.

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“…These methods include computerized flatbed knitting, 3D knitting ( Maziz et al., 2017 ; Munden, 1959 ; Spencer, 2001 ), 3D weaving, and multi-phase weaving ( Gandhi and Sondhelm, 2016 ) techniques, which could allow stand-alone compact TENG architectures with desirable motion characteristics. Conventionally, TENGs have been incorporated into specified regions of garments, for example, the underarm area ( Ning et al., 2018 ) and the sleeves ( Haque et al., 2018 ), considering the availability of high mechanical power. Instead of traditional integration techniques such as sewing, fabric development methods such as the intarsia knitting technique can be used to incorporate triboelectrically active TENG regions into selected parts of a garment panel with high integrity and seamless finishes ( Spencer, 2001 ), providing the potential to significantly enhance their wearable characteristics.…”

Section: Fabric-related Teng Developmentsmentioning

confidence: 99%

Towards Truly Wearable Systems: Optimizing and Scaling Up Wearable Triboelectric Nanogenerators

2020

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Summary Triboelectric nanogenerator (TENG) is an upcoming technology to harvest energy from ambient movements. A major focus herein is harvesting energy from human movements through wearable TENGs, which are constructed by integrating nanogenerators into clothing or accessories. Textile-based TENGs, which include fiber, yarn, and fabric-based TENG structures, account for the majority of wearable TENGs, with many designs and applications demonstrated recently. This calls for a comprehensive analysis of textile-based TENG technology, and how the state-of-the-art device optimization concepts can be deployed to construct them efficiently. Concurrently, how advanced engineering concepts and industrial manufacturing techniques, which are bound with fiber, yarn, and fabric-related developments, can be applied into the TENG context for their output enhancement is still under investigation. Herein, we fill this vital gap by analyzing the state-of-the-art developments, upcoming trends, output optimization strategies, scalability, and prospects of the textile-based TENG technology, presenting a textile engineering perspective.

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Soft triboelectric generators by use of cost-effective elastomers and simple casting process

Cited by 22 publications

References 24 publications

Silicone composites cured under a high electric field: an electromechanical experimental study

Silicone composites cured under a high electric field: an electromechanical experimental study

Triboelectric‐TFT Flip‐Flop for Bistable Latching of Dielectric Elastomer Actuators

Towards Truly Wearable Systems: Optimizing and Scaling Up Wearable Triboelectric Nanogenerators

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