▎ 摘　　要

NOVELTY - Anti-cracking inorganic sealant comprises sodium silicate, sodium fluorosilicate, mica, modified graphene oxide, modified polyvinyl alcohol fiber, modified carbon nanotube and additive, where e.g. preparation method of modified graphene oxide comprises mixing graphene oxide with petroleum ether in a mass ratio of 1:150-1:200, ultrasonically dispersing, adding graphene oxide, stirring and reacting, steaming and concentrating, and vacuum drying to obtain modified graphene oxide blank, then mixing modified graphene oxide blank with nitric acid in a mass ratio of 1:8-1:12, and filtering to obtain modified graphene oxide; preparation method of modified polyvinyl alcohol fiber comprises mixing polyvinyl alcohol solution and graphene oxide solution i, stirring and mixing, electrospinning, and drying to obtain modified polyvinyl alcohol fiber; preparation method of modified carbon nanotube comprises mixing carbon nanotube with absolute ethanol, ultrasonically dispersing. USE - Used as anti-cracking inorganic sealant. ADVANTAGE - The sealant: has excellent toughness. DETAILED DESCRIPTION - Anti-cracking inorganic sealant comprises 70-100 pts. wt. sodium silicate, 15-20 pts. wt. sodium fluorosilicate, 10-18 pts. wt. mica, 10-15 pts. wt. modified graphene oxide, 10-15 pts. wt. modified polyvinyl alcohol fiber, 8-12 pts. wt. modified carbon nanotube and 5-8 pts. wt. additive, where preparation method of modified graphene oxide comprises mixing graphene oxide with petroleum ether in a mass ratio of 1:150-1:200, ultrasonically dispersing, adding graphene oxide (5-10 times of paraffin dispersion), stirring and reacting, steaming and concentrating, and vacuum drying to obtain modified graphene oxide blank, then mixing modified graphene oxide blank with nitric acid in a mass ratio of 1:8-1:12, and filtering to obtain modified graphene oxide; preparation method of modified polyvinyl alcohol fiber comprises mixing polyvinyl alcohol solution and graphene oxide solution in a volume ratio of 5:1-8:1, stirring and mixing, electrospinning, and drying to obtain modified polyvinyl alcohol fiber; preparation method of modified carbon nanotube comprises mixing carbon nanotube with absolute ethanol in a mass ratio of 1:280-1:300, ultrasonically dispersing, adjusting the pH to 8-10, stirring and reacting, then adjusting pH to neutral, filtering with water, and vacuum drying to obtain pre-modified carbon nanotube, then mixing pre-modified carbon nanotubes with ethanol solution in a mass ratio of 1:200-1:280, ultrasonically dispersing, adding mixture of pre-modified carbon nanotube (5-8 times) and pre-modified carbon nanotube (10-30 times) into mixture of tetraethyl orthosilicate, stirring and reacting to obtain modified carbon nanotube mixture, then mixing modified carbon nanotube mixture with silane coupling agent mixture in a mass ratio of 20:1-40:1, filtering and drying to obtain modified carbon nanotube blank, then mixing modified carbon nanotube blank with hydrochloric acid in a mass ratio of 1:5-1:8, and filtering to obtain modified carbon nanotube; and preparation method of additive comprises mixing gelatin microsphere and boric acid solution in a mass ratio of 1:6-1:10, adjusting the pH to 2.3-2.5, stirring, then adjusting the pH to 4.8-5.8, and filtering to obtain additive.