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Dielectric materials with high thermal conductivity and outstanding dielectric properties are highly desirable for advanced electronics. However, simultaneous integration of those superior properties for a material remains a daunting challenge. Here, a multifunctional epoxy composite is fulfilled by incorporation of boron nitride nanosheets (BNNSs) and mesoporous silica coated multi-walled carbon nanotubes (MWCNTs@mSiO 2 ). Owing to the effective establishment of continuous thermal conductive network, the obtained BNNSs/MWCNTs@mSiO 2 /epoxy composite exhibits a high thermal conductivity of 0.68 W m -1 K -1 , which is 187% higher than that of epoxy matrix. In addition, the introducing of mesoporous silica dielectric layer can screen charge movement to shut off leakage current between MWCNTs, which imparts BNNSs/MWCNTs@mSiO 2 /epoxy composite with high dielectric constant (8.10) and low dielectric loss (&lt;0.01) simultaneously. It is believed that the BNNSs/MWCNTs@mSiO 2 /epoxy composites with admirable features have potential applications in modern electronics.

materials

Synergistic Enhanced Thermal Conductivity and Dielectric Constant of Epoxy Composites with Mesoporous Silica Coated Carbon Nanotube and Boron Nitride Nanosheet