▎ 摘　　要

NOVELTY - An oxygen-barrier waterproof sealing film is formed by mixing silane-modified graphene oxide nanoribbons obtained using longitudinally cut multi-walled carbon nanotubes, and ethylene-vinyl acetate copolymer as raw material components and forming paste, and coating formed paste on a substrate. The silane is gamma -methacryloyloxypropyltrimethoxysilane. USE - Oxygen-barrier waterproof sealing film is used for precision instrument, and packing frozen products and food. ADVANTAGE - The oxygen-barrier waterproof sealing film has excellent acid-and-alkali resistance, and is environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of oxygen-barrier waterproof sealing film. 180-200 ml Concentrated sulfuric acid is added to a round bottomed flask, then 20-25 ml 85.5 wt.% phosphoric acid is added to concentrated sulfuric acid, stirred, and stabilized. Then, 1-1.2 g multi-walled carbon nanotubes are added, and stirred for 1-2 hours. When the multi-walled carbon nanotubes are uniformly dispersed, 6-8 g potassium permanganate is added to the mixture, stirred for 0.5-1 hour, and reaction system is placed in an oil bath at 45-60 degrees C for 1-2 days. The obtained mixture is added to a system containing 500 ml deionized water, and mixed for 1-2 hours. When the temperature is reduced to room temperature, 10-15 ml 30 wt.% hydrogen peroxide is added and stirred for 2-4 hours. Then, the mixture is ultrasonically-dispersed for 0.5-1 hour after adding 100-120 ml 38 wt.% aqueous hydrochloric acid solution, filtered using Teflon (RTM: polytetrafluoroethylene) membrane and washed 4-6 times, to obtain graphene oxide nanoribbons. The obtained graphene oxide nanoribbons are dispersed in 500 ml absolute ethanol, ultrasonically-dispersed for 1-2 hours and then pH value of mixture is adjusted to 3-4 by adding hydrochloric acid. 2.5-3 g gamma -methacryloyloxypropyltrimethoxysilane is dispersed in 100 ml anhydrous ethanol, ultrasonically-dispersed for 20-30 minutes and added to the prepared mixture. The mixture is heated at 60-70 degrees C for 1-2 days, centrifuged, filtered and washed using absolute ethanol and deionized water for 4-6 times, to obtain silane-modified graphene oxide nanoribbons. The silane-modified graphene oxide nanoribbons are dissolved in a toluene solution, ultrasonically-dispersed for 1-2 hours, then the dispersion is added into a round-bottomed flask, stirred, ethylene-vinyl acetate copolymer particles are added, and warmed at 65-75 degrees C for 24-30 hours to obtain a mixed liquid paste, which is then coated on substrate to form silane-modified graphene oxide nanoribbons/ethylene-vinyl acetate copolymer composite film.