Departmental Bulletin Paper Electrically Functional Silicone Composites and Their Application in Mechanical Sensors

Chen, Guo  ,  Dianming, Sun  ,  Chika, Takai  ,  Razavi, Hadi  ,  Takashi, Shirai  ,  Feng, Wang  ,  Masayoshi, Fuji

As a type of special elastomer, silicone elastomer possesses a lot of advantages such as an extreme flexibility, a very wide temperature tolerance range, an excellent insulation and an unparalleled good biocompatibility, which can be utilized in industrial, health care or daily lives. In order to widen the areas of use, overcome some drawbacks of the silicone elastomer, many kinds of functional fillers could be integrated into the elastomer. Just to take advantage of its excellent insulation, inorganic fillers with high dielectric constants, such as BaTiO3 and TiO2, could be added into the silicone elastomer to fabricate a flexible composite with a high dielectric constant, which can be utilized as an actuator, or be appropriate to be assembled to a tactile or vibration sensor. On the other side, inorganic fillers with high electrical conductivities and large relative surface areas, such as MWCNT, carbon short fiber or graphene, could be integrated into the elastomer to provide a low resistivity. This type of composite has an obvious piezoresistive property, which is suitable for being used within a tactile sensor. Many previous outstanding works were discussed in the article.

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