Strong interface effect induced high-k property in polymer based ternary composites filled with 2D layered Ti₃C₂ MXene nanosheets

Abstract

High permittivity property is hard to achieve in the binary polymer based nanocomposites filled with wide-band-gap semiconductors unless substantial semiconductor fillers are introduced into polymer matrices. The overload of those semiconducting nanofillers usually results in the severe reduction of the mechanical and electric breakdown properties of the composite materials. In this work, the novel ternary polymer based nanocomposites were designed and further fabricated through adding a low concentration of 2D Ti₃C₂ MXene nanosheets into the binary polymer based nanocomposites containing alpha-SiC nanoparticles. In comparison with the binary composites, these ternary composites could exhibit the notably improved high permittivity properties due to significantly enhanced interface interaction from the introduction of MXene nanosheets. The desirable highly maintained comprehensive electrical properties and mechanical performances have been achieved in those ternary composites. This work might open the door to the large-scale preparation of promising high-permittivity nanocomposite dielectric materials based on building the ternary composite systems.