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조동균,신동호,홍경민,최민재,라스쿠마리 린토이나안비,은웬티구에,박성준 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Stretchable and soft piezoresistive composites are appealing materials for application in tactile sensors, artificial skin and wearable electronics. The ability of the composites to deform the geometries when they are strained can allow the composites to manipulate the electrical behavior. Here, we utilized liquid metal inclusion into the elastomeric foam substrate with 3D open cell morphologies. The liquid metal is a fluidic conductor, thus it was possible to infiltrate the liquid metal into the 3D interconnected pore, resulting in the soft, stretchable and shape reconfigurable conductive composites that can change shape and function in response to external stimuli. Applying strain can enable the deformation of the liquid metal, generating changes of the electrical resistance. Interestingly, we found this piezoresistivity of the composite can be positively and negatively manipulated by adjusting the geometries of the liquid metal in the foam.