Anisotropic conductive, tough and stretchable heater based on nacre-like crumpled graphene composite

Abstract

In this work, the nacre-like styrene-butadiene rubber/crumpled graphene nanosheets heater (NSGH) with integrated superior performance, including excellent anisotropic conductivity (safety), flexible stretchable Joule heating performance and comprehensive mechanical performance, is prepared on a large-scale by the blade-coating technique. The excellent flexible stretchable Joule heating performance, almost constant of the saturation temperature (163 °C) at the excitation of 8 V suffering 70% strain and 4000 times of bending, is originated from the selection of elastic styrene-butadiene rubber matrix and introduction of flexible conductive crumpled graphene nanosheets. The excellent comprehensive mechanical performance (increment of 215.7% on toughness and 531.85% on initial tensile modulus) and the ultrahigh anisotropic conductivity are attributed to the distinctive nacre-like structure. Moreover, the heating model of the NSGH is proposed and validated, that the heating performance can be tailored and forecasted.