Surface modified graphene/single-phase polyurethane elastomers with improved thermo-mechanical and dielectric properties

摘要: Abstract We report an efficient, simple and fast method for graphene surface modification its novel use the fabrication of very soft, single-phase polyurethane (PU) nanocomposite elastomers. Content modified (SMG) in PU was between 0.2 5 wt%. FT-IR thermogravimetric analysis indicated successful by 3-aminopropyltriethoxysilane while a large increase viscosity polyol blend with SMG content suggested exfoliation down to six layers, as observed atomic force microscopy (AFM). The scanning electron AFM elastomers revealed strong SMG–PU interactions good dispersion within matrix, respectively. Consequently, we measured more than two-fold tensile strength storage modulus SMG/PU elastomer at addition 5 wt% SMG, compared unfilled PU. An initial degradation temperature maximum rate weight loss upshifted 10 °C 8 °C, respectively, showing improved thermal stability matrix. Finally, increased dielectric permittivity 1 Hz from 3.6 up 34.2 glassy state, spectroscopy indicating energy capabilities these nanocomposites.