ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
The need for high electric fields to drive dielectric elastomers is still retaining theirdiffusion as actuators in some areas of potential application, as in the case of biomedicaldisciplines. The development of new materials offering superior electromechanical properties isthus an essential requirement in order to effectively reduce the driving fields. In this light, thepresent work is aimed to enhance the electromechanical properties of two silicone and polyurethanebased dielectric elastomers, both by making particulate composites with high-permittivity ceramicfillers, and by blending with a highly polarisable polymeric phase. Due to a consequent worseningof the mechanical properties, pure composite architectures yielded only limited results on theoverall electromechanical response. With the blend approach, instead, both an increase of thedielectric permittivity and an unexpected reduction of the tensile elastic modulus were observed,leading to an overall increase of the electromechanical response. In any case, a key role appears tobe played by the nature and intensity of polarisation phenomena arising at interfaces betweendifferent phases
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.61.46.pdf
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