▎ 摘　　要

NOVELTY - Preparing optical glass with surface coated with nano-material comprises (i) (a) using acetic acid to adjust the pH of acetone solution, adding gamma-mercaptopropyl trimethoxy silane, and adding nano lanthanum oxide, (b) uniformly mixing dimethyl sulfoxide, azobisisobutyronitrile, α-picoline and tetraethoxysilane, (c) mixing the dried cyanate resin and epoxy resin evenly, (ii) dissolving tetrabutyl titanate in absolute ethanol, adding glacial acetic acid, dissolving hexahydrate cobalt chloride, urea and thiourea in absolute ethanol to obtain solution (B), slowly adding solution B to solution A, reacting for 1-2 hours, and reacting for 15-20 minutes to obtain modified titanium dioxide, (iii) melting silicon dioxide, diboron trioxide, bismuth oxide, barium oxide, antimony trioxysilane, zinc oxide and rare earth oxide, clarifying, casting into pre-heating mold, and annealing, and (iv) coating layer of nano composite slurry on the outer surface of the optical glass. USE - The method is useful in optical glass technical field specifically to optical glass coated with nano-metric material on surface. ADVANTAGE - The method provides optical glass having high refractive index, excellent acid and alkali resistance, excellent wear resistance and corrosion resistance, and excellent anti-crystallization performance. DETAILED DESCRIPTION - Preparing optical glass with surface coated with nano-material comprises (i) (a) using acetic acid to adjust the pH of acetone solution, adding gamma-mercaptopropyl trimethoxy silane, and adding nano lanthanum oxide, (b) uniformly mixing dimethyl sulfoxide, azobisisobutyronitrile, α-picoline and tetraethoxysilane, adding pretreated lanthanum oxide, sonicating for 10-20 minutes, slowly adding methyl methacrylate dropwise, reacting for 1-2 hours, cooling, filtering with suction, rinsing with absolute ethanol and water, vacuum drying, and filtering to obtain modified lanthanum oxide, (c) mixing the dried cyanate resin and epoxy resin evenly, adding dibutyltin dilaurate, and dispersing for 10-20 seconds, adding pretreated styrene monomer, modified lanthanum oxide and graphene, reacting for 10-20 seconds, adding acetone solution, and uniformly mixing, (ii) dissolving tetrabutyl titanate in absolute ethanol, adding glacial acetic acid, uniformly mixing to obtain solution (A), dissolving hexahydrate cobalt chloride, urea and thiourea in absolute ethanol to obtain solution (B), slowly adding solution B to solution A, reacting for 1-2 hours, placing for 5-8 hours, evaporating the solvent at 70-80℃, drying, adding sodium dodecyl sulfate, reacting, adding water, reacting and reacting for 15-20 minutes to obtain modified titanium dioxide, (iii) melting silicon dioxide, diboron trioxide, bismuth oxide, barium oxide, antimony trioxysilane, zinc oxide and rare earth oxide at 700-1200℃ for 10-20 hours, clarifying, casting into pre-heating mold, and annealing, and (iv) coating layer of nano composite slurry on the outer surface of the optical glass. An INDEPENDENT CLAIM is also included for optical glass prepared by the method.