▎ 摘　　要

NOVELTY - Environmentally friendly bio-oil starch adhesive comprises 48 pts. wt. starch, 1.1 pts. wt. oxidizing agent, 30 pts. wt. polyvinyl alcohol, 15 pts. wt. acrylamide, 9 pts. wt. quaternary ammonium chitosan, 28 pts. wt. biological oil, 7 pts. wt. curing agent, 11 pts. wt. modified cellulose, and 11 pts. wt. modified silicon dioxide. The curing agent comprises isocyanate modified graphene, polyisocyanate and glyoxal in the mass ratio of 2:2:1. The isocyanate-modified graphene is prepared by reacting graphene oxide, dimethylformamide, toluene diisocyanate and catalyzer under nitrogen environment, filtering, washing, and vacuum-drying. The adhesive is prepared by preparing materials, providing cellulose nanocrystals and deionized water, ultrasonically dispersing, adding 3-aminopropyltriethoxysilane, refluxing, cooling, washing with deionized water, collecting by centrifugation, mixing and dissolving starch and hydrochloric acid, and stirring. USE - The adhesive is useful for gluing plywood used for forming three-layer or multi-layer plate-shaped material. ADVANTAGE - The method is simple, and has reasonable component distribution ratio. The adhesive has excellent water resistance and bonding performance, excellent antibacterial properties, and improved practicability. DETAILED DESCRIPTION - Environmentally friendly bio-oil starch adhesive comprises 48 pts. wt. starch, 1.1 pts. wt. oxidizing agent, 30 pts. wt. polyvinyl alcohol, 15 pts. wt. acrylamide, 9 pts. wt. quaternary ammonium chitosan, 28 pts. wt. biological oil, 7 pts. wt. curing agent, 11 pts. wt. modified cellulose, and 11 pts. wt. modified silicon dioxide. The curing agent comprises isocyanate modified graphene, polyisocyanate and glyoxal in the mass ratio of 2:2:1. The isocyanate-modified graphene is prepared by reacting graphene oxide, dimethylformamide, toluene diisocyanate and catalyzer under nitrogen environment, filtering, washing, and vacuum-drying to obtain finished product. The starch is tapioca starch. The adhesive is prepared by (1) preparing materials, (2) providing cellulose nanocrystals and deionized water, ultrasonically dispersing for 18 minutes, adjusting the pH to 4, heating to 75°C, adding 3-aminopropyltriethoxysilane, refluxing for 3.5 hours, cooling, washing with deionized water, collecting by centrifugation, drying at 58°C for 12 hours to obtain material A, providing formaldehyde and adenosine triphosphate disodium salt solution, mixing and stirring for 15 minutes, heating to 115°C, stirring, reacting for 18 minutes, adding material A, continuously stirring, reacting for 2.5 hours, adding silver nitrate solution and ethylene glycol, reacting for 3.5 hours, cooling to room temperature, and washing with deionized water to obtain modified cellulose, (3) providing tartaric acid and deionized water, mixing and stirring for 15 minutes, adding absolute ethanol, maintaining the temperature at 26°C for 25 minutes, adding tetraethyl orthosilicate, allowing to stand for 55 minutes, adding ammonia water, reacting at 26°C for 2.3 hours, washing with deionized water, drying in vacuum at 62°C for 2.5 hours, and calcining at 540°C to obtain silica nanotubes, providing silica nanotubes and absolute ethanol, ultrasonically dispersing for 15 minutes, adding ammonia water, continuously stirring for 6 minutes, adding 2-cyanoethyltriethoxysilane, heating to 68°C, and reacting for 11 hours, centrifuging, washing twice with ethanol, and drying at 55°C for 17 hours to obtain modified silica, and (4) mixing and dissolving starch and hydrochloric acid, adding ammonium persulfate at 52°C, stirring for 35 minutes, adding polyvinyl alcohol e, adjusting the pH to 5, adding acrylamide, quaternary ammonium salt chitosan, continuously reacting for 1.5 hours, adjusting the pH value to 7, adding bio-oil, curing agent, modified cellulose and modified silica, stirring for 1.5 hours to obtain the finished product.