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http://dx.doi.org/10.3795/KSME-A.2016.40.9.815

Large-strain Soft Sensors Using Elastomers Blended with Exfoliated/Fragmented Graphite Particles  

Park, Sungmin (Dept. of Mechanical Engineering, Inha Univ.)
Nam, Gyungmok (Dept. of Mechanical Engineering, Inha Univ.)
Kim, Jonghun (Dept. of Mechanical Engineering, Inha Univ.)
Yoon, Sang-Hee (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.40, no.9, 2016 , pp. 815-820 More about this Journal
Abstract
An elastic polymer (e.g., PDMS) blended with EFG particles is a promising conductive composite for fabricating soft sensors that can detect an object's deformation up to or more than 50%. Here, we develop large-strain, sprayable soft sensors using a mixture of PDMS and EFG particles, which are used as a host elastomer and electrically conductive particles, respectively. A solution for a conductive composite mixture is prepared by the microwave-assisted graphite exfoliation, followed by ultrasonication-induced fragmentation of the exfoliated graphite and ultrasonic blending of PDMS and EFG. Using the prepared solutions for composite and pure PDMS, 1-, 2-, and 3-axis soft sensors are fabricated by airbrush stencil technique where composite mixture and pure PDMS are materials for sensing and insulating layers, respectively. We characterize the soft strain sensors after investigating the effect of PDMS/EFG wt% on mechanical compliance and electrical conductance of the conductive composite.
Keywords
Elastomer; Exfoliated/Fragmented Graphite; Large Strain; Soft Sensor;
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