▎ 摘　　要

NOVELTY - Preparing graphene-modified aqueous-based non-stick coating comprises e.g. dispersing multi-layer graphene in water through pre-dispersion process and graphene slurry, blending the prepared graphene slurry with zinc salt, after vacuuming at room temperature, replacing with inert gas, vacuuming and inert gas replacement and repeating after the second time, pressurizing to with inert gas, and then adding the reducing agent drop by drop, after the drop addition is completed, and reacting and stirring, adjusting the pressure to normal pressure, adding tetraethylorthosilicate, adjusting the pH, stirring and reacting, and then filtering to obtain zinc-containing graphite modified in situ by the inorganic ceramic network, mixing pre-fluorine emulsion and tetraethyl orthosilicate, pre-mix the fluorine-containing emulsion and tetraethyl orthosilicate, and adding the zinc-containing graphene modified in situ in inorganic ceramic network, stirring and reacting, adding binder resin, and water. USE - The graphene-modified aqueous-based non-stick coating is useful for iron cookware (claimed). ADVANTAGE - The coating: has good adhesion to the coating substrate after film formation, has the advantages of anti-polymerization heat, anti-corrosion, good antibacterial property, good durability, strong non-stickiness, can occurs primary cell electrochemical corrosion, uses elemental zinc as a sacrificial electrode to delay the corrosion of the substrate, and has antibacterial properties. DETAILED DESCRIPTION - Preparing graphene-modified aqueous-based non-stick coating comprises (i) dispersing multi-layer graphene in water through pre-dispersion process and graphene slurry with a mass fraction of 0.5-25%; (ii) blending the graphene slurry prepared in step (i) with zinc salt, after vacuuming at room temperature to a degree of vacuum greater than or equal to 10 Pa, replacing with inert gas, vacuuming and inert gas replacement and repeating after the second time, pressurizing to 20-50 MPa with inert gas, and then adding the reducing agent drop by drop, after the drop addition is completed, the temperature is increased to 50-150 degrees C and reacting and stirring at 1050 rpm for 5-60 minutes, adjusting the pressure to normal pressure, adding tetraethylorthosilicate, adjusting the pH to 1-4, stirring and reacting at 40-80 degrees C at 200-300 rpm for 2-5 hours, and then filtering to obtain zinc-containing graphite modified in situ by the inorganic ceramic network and the mass ratio of multi-layer graphene, zinc and tetraethyl orthosilicate is 305:10-2:1; (iii) mixing pre-fluorine emulsion and tetraethyl orthosilicate, pre-mix the fluorine-containing emulsion and tetraethyl orthosilicate, and then adding the zinc-containing graphene modified in situ in inorganic ceramic network prepared in step (ii), stirring and reacting at 40-80 degrees C under 200-300 revolutions/minute at for 2-5 hours, adding binder resin, high temperature resistant fillers, additives and water to obtain the finished product and the mass ratio of fluorine-containing emulsion, tetraethyl orthosilicate and multilayer graphene is 50-100:2-5:1.