| abstract |
A flexible flame-retardant aerogel, a preparation method and application thereof belong to the technical field of aerogels. The flexible flame-retardant aerogel is prepared from the following raw materials: the nano-crystalline cellulose comprises nano-cellulose, sodium alginate, organosilane, boric acid, sodium tetraborate decahydrate, calcium carbonate and D- (+) -gluconic acid delta-lactone, wherein the nano-cellulose comprises cellulose nano-wires and cellulose nano-microfibers rich in carboxyl on the surface. The invention utilizes the morphological structure characteristics of the high length-diameter ratio of the cellulose nanowires to improve the degree of association between single nanocelluloses so as to increase the flexibility of the aerogel, utilizes the intrinsic flame retardant property of sodium alginate and the synergistic flame retardant property of boron flame retardants, and has wide application prospects in the fields of aerospace, buildings, flame retardance of special-shaped parts, heat insulation and the like. |