Concept

Énergie mécanique

Publications associées (46)

Synthesis of polysiloxane elastomers modified with sulfonyl side groups and their electromechanical response

Dielectric elastomer transducers are elastic capacitors that respond to mechanical or electrical stress. They can be used in applications such as millimeter-sized soft robots and harvesters of the energy contained in ocean waves. The dielectric component o ...

ROYAL SOC CHEMISTRY2023

Uniaxial fiber reinforced DEA fabrication

Julian Asboth

Dielectric Elastomer Actuators (DEA) are devices designed to convert electric energy into mechanical work. However, the current actuator design will expand when actuated while muscles contract. Fiber reinforcement may allow for anisotropic movement, which ...

2023

High Permittivity Siloxanes as Promising Materials for Dielectric Elastomer Transducers: From Synthesis to Application

Yauhen Sheima

The speed of change in the modern world is impressive. Within the last 50 years, many devices and technologies have significantly transformed their appearance, intrinsic characteristics and improved their performance. Computers have changed from the size o ...

EPFL2022

Study of the enhanced electricity output of a sliding droplet-based triboelectric nanogenerator for droplet sensor design

Jürgen Brugger, Xia Liu, Wei Xu, Xiaopeng Li

Triboelectric nanogenerators are establishing themselves as promising candidates for realizing high-efficient energy harvesting from largely available droplets. However, the conventional droplet-based liquid-solid triboelectric nanogenerator (DLS-TENG) has ...

2022

Evaluation of dielectric elastomers to develop materials suitable for actuation

Yves Perriard, Yoan René Cyrille Civet, Thomas Guillaume Martinez, Jonathan André Jean-Marie Chavanne, Morgan Almanza

Electroactive polymers based on dielectric elastomers are stretchable and compressible capacitors that can act as transducers between electrical and mechanical energies. Depending on the targeted application, soft actuators, sensors or mechanical-energy ha ...

2021

A High Efficiency Pneumatic Drive System Using Vane-Type Semi-Rotary Actuators

Alfred Rufer

A compressed air driven generator is proposed, where the pneumatic energy is converted into mechanical energy using two vane-type rotational actuators. The use of a second actuator with a higher displacement in order to produce a thermodynamic expansion al ...

UNIV NIS2021

Catalytic layer - membrane electrode assembly methods for optimum formation of triple phase boundaries and fuel cell performances.

Hubert Girault, Wanderson Oliveira Da Silva, Victor Costa Bassetto, Solène Cindy Gentil

Proton Exchange Membrane Fuel Cell (PEMFC), designed mainly for mobility applications, converts chemical energy to electrical energy. The formation of electrodes for PEMFC is a delicate balancing of transport media. Conductivity of gas, electrons, and prot ...

2021

District scale influence of waste heat on the subsurface conditions: a numerical investigation for Chicago

Stéphane Hartmann

Since the 20th century, the rate of urbanization in the world has been increasing exponentially and will reach 68% in 2050. In parallel with this expansion, the size and activities of cities are also greatly growing. As a result, cities are depleting avail ...

2020

Autonomous oil flow generated by self-oscillating polymer gels

Vito Cacucciolo

The previously reported gel and polymer actuators require external inputs, such as batteries, circuits, electronic circuits, etc., compared with autonomous motions produced by the living organisms. To realize the spontaneous motions, here, we propose to in ...

NATURE PUBLISHING GROUP2020

Adhesive wear and interaction of tangentially loaded micro-contacts

Jean-François Molinari, Son-Jonathan Pham-Ba, Tobias Brink

Current engineering wear models are often based on empirical parameters rather than built upon physical considerations. Here, we look for a physical description of adhesive wear at the microscale, at which the interaction between two surfaces comes down to ...

2020

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