▎ 摘　　要

NOVELTY - Preparing graphene masterbatch comprises e.g. (i) adding the anionic surfactant into the water, mixing fully, adding graphene oxide to form uniform dispersion and adjusting the pH value to obtain a graphene oxide aqueous dispersion; (ii) adding the surface modifier into the water, mixing fully, adding the graphene oxide dispersion into it, adding an activator and a catalyst and reacting to obtain a modified graphene oxide aqueous dispersion; (iii) adding deionized water into the natural latex, adding the modified graphene oxide aqueous dispersion, mixing fully to obtain a uniformly dispersed mixed emulsion, forming binding particles and remain stable due to the positive ion electrostatic attraction of the protein-phospholipid film on the surface of the rubber particles, carrying out flocculation, aggregating the binding particles and rubber particles in the aqueous phase in an orderly manner and co-precipitating out, washing the raw glue, dehydrating and drying. USE - The method is useful for preparing graphene masterbatch is useful for forming a road wheel tire for a heavy-duty vehicle (claimed) for supporting and promoting social development, national economy and national defense industry. ADVANTAGE - The method: enables to prepare graphene master batch which has high graphene content master batch with uniform dispersion of each component and with improved performance and good dispersibility and mechanical property; reduces pollution and energy consumption; shortens processing time; is economical and environmentally-friendly; has improved the flexibility of processing, and reduced the natural rubber product processing; can greatly save labor, raw material and transportation cost, so as to greatly reduce the production cost and avoid the rubber mixing stage causing dust pollution. DETAILED DESCRIPTION - Preparing graphene masterbatch comprises (i) adding the anionic surfactant into the water, mixing fully, adding graphene oxide to form uniform dispersion and adjusting the pH value of the obtained graphene oxide aqueous dispersion to 10 to obtain a graphene oxide aqueous dispersion; (ii) adding the surface modifier into the water, mixing fully, adding the graphene oxide dispersion into it, adding an activator and a catalyst and reacting for a certain period of time to obtain a modified graphene oxide aqueous dispersion; (iii) adding deionized water into the natural latex, adding the modified graphene oxide aqueous dispersion, mixing fully to obtain a uniformly dispersed mixed emulsion, using the modified graphene oxide particles to form binding particles and remain stable due to the positive ion electrostatic attraction of the protein-phospholipid film on the surface of the rubber particles, adding a flocculant into the mixed emulsion, carrying out flocculation due to the reduction of the negative charge repulsion between particles that keeps the rubber emulsion stable, where the damaged rubber particles and modified graphene particles adsorbs to each other by π-π force, aggregating the binding particles and rubber particles in the aqueous phase in an orderly manner and co-precipitating out, washing the raw glue, dehydrating and drying. An INDEPENDENT CLAIM is also included for forming a road wheel tire for a heavy-duty vehicle, comprising (i) placing the prepared graphene masterbatch and the natural rubber block rubber in an internal mixer for mastication, adding vulcanization accelerator NOBS, anti-aging agent 4010NA, antioxidant RD, zinc oxide and carbon black in sequence, mixing evenly and discharging the rubber; (ii) cooling the rubber compound to room temperature, transferring into an open mill for kneading, adding sulfur, mixing evenly, diluting the compound until there are no bubbles in the compound, and stopping forming rubber, milling the rubber on an open mill until the rubber surface is smooth and uniform, and placing in a tire mold for vulcanization.