Synthesis of gas barrier starch by dispersion of functionalized multiwalled carbon nanotubes

► Starch/MWCNT nanocomposites were prepared by low cost solution casting green method. ► The interaction of f-MWCNT with starch was achieved by FTIR, XRD, FESEM and HRTEM. ► Electrical conductivity was increased sixteen times as compared virgin starch. ► Oxygen permeability of starch was reduced to half with addition of small amount of f-MWCNT.