At IRC International Rubber Conference in Nürnberg – organized by the German Kautschuk Gesellschaft –the Center Smart Materials CeSMa, part of the Fraunhofer Institute for Silicate Research ISC in Würzburg, Germany, will present latest projects involving elastomer materials.
From June 29 to July 2, 2015 everyone interested is invited to visit booth 178 in hall 12 for more information on CeSMa projects and to experience the novel sensor, actuators, and generators with several demonstrators.
CeSMa research focuses on smart materials able to perform controllable sensor or actuator functions. In particular, the elastomers which are switchable by applying magnetic or electric fields and which consist predominantly of silicone, offer great potential for a wide variety of industrial applications.
New textile-integrated pressure sensors can take 3D measurements, e.g. in special socks for diabetics. Results can be checked on a smart phone.
Photo: K. Selsam-Geißler for Fraunhofer ISC
As capacitive measuring sensors they function as a strain or pressure sensor. They are adaptable to almost any given situation and can be even integrated into textiles. Compared to conventional solutions they save energy, weight, material, and production costs.
Owing to the iron particles embedded in their soft matrix, magnetorheological elastomers (MRE) can be magnetically controlled and so are able to perform complex movements. Their simple design also makes them an alternative to conventional electric motors or magnetic switches. Applications include dampers, seals, valves as well as soft haptic elements like buttons and grippers.
Dielectric elastomer actuators (DEA), on the other hand, are composed of insulating elastomer films coated with highly flexible electrodes on both sides. When voltage is applied to the electrodes, the thickness of the elastomer film decreases through the interaction between the oppositely charged layers. This principle can be applied to noiseless, ultra-light linear actuators used as muscles in artificial prostheses or robotic grippers. DEAs can be integrated as diaphragms in extremely thin and lightweight loud speakers.
With pressure or draught the elastomeric films change their thickness area ratio and thus the capacity as indicator. These dielectric elastomer sensors (DES) can be manufactured at low cost and are suitable as large flexible sensors of very good chemical, thermal and mechanical stability, for example for pressure distribution measurement in seats or mattresses.
The elastomer sensors can also be integrated into textiles and permit a three-dimensional pressure measurement through a specially developed stocking for diabetics that warns of pressure sores.
Sensor patches with an area of 1 cm² and a thickness of 2 mm can record pressure or strain even in inaccessible places.
Beyond the strain measurements additionally integrated conductive layers are able to detect the approach of a foreign object. This offers the possibility for elastic collision protection coatings for human-machine interfaces.
Dielectric elastomer generators (DEG) enable innovative, eco-friendly energy harvesting obtained through low water flows of small rivers. The pressure – generated with a gentle pipe system (Venturi principle) – leads to a periodic elongation and relaxation of the elastomer films. With the help of an electronic circuit this mechanical stretching is directly converted into electrical energy. In contrast to conventional regenerative energy converters DEGs don’t generate optical or acoustic disturbances of the environment. The use of these generators is suited for campsites or charging stations for electric bikes and cars in rural areas.
Marie-Luise Righi | Fraunhofer-Institut für Silicatforschung ISC
IVAM Product Market „High-tech for Medical Devices“ at COMPAMED 2017
18.10.2017 | IVAM Fachverband für Mikrotechnik
Fiber Optic Collimation C-Lenses will be Exhibited by FISBA at OFC 2017
14.03.2017 | FISBA AG
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Information Technology
20.10.2017 | Materials Sciences
20.10.2017 | Interdisciplinary Research