▎ 摘　　要

NOVELTY - A vacuum-type polyethylene composite nano-vacuum building material comprises ethylene-vinyl acetate copolymer, high-polyethylene, nano-active agent, foam alumina, nano-cerium oxide powder, polylactic acid chitosan, nano-graphene, aluminum hydroxy compound, nano-alumina, soil, sea mud, polyvinyl acetate, tung oil, waste syrup, sodium lauroyl sarcosine, fir rubber, asbestos, additives and water. USE - Vacuum-type polyethylene composite nano-vacuum building material (claimed). ADVANTAGE - The vacuum-type polyethylene composite nano-vacuum building material is environmentally-friendly, and has excellent biodegradability and antibacterial property and improved porosity, efficacy and specific surface area. DETAILED DESCRIPTION - A vacuum-type polyethylene composite nano-vacuum building material comprises 20-25 pts. wt. ethylene-vinyl acetate copolymer, 8-10 pts. wt. high-polyethylene, 5-8 pts. wt. nano-active agent, 8-10 pts. wt. foam alumina, 5-8 pts. wt. nano-cerium oxide powder, 15-20 pts. wt. polylactic acid chitosan, 10-15 pts. wt. nano-graphene, 4-7 pts. wt. aluminum hydroxy compound, 2-4 pts. wt. nano-alumina, 10-15 pts. wt. soil, 8-12 pts. wt. sea mud, 5-10 pts. wt. polyvinyl acetate, 4-6 pts. wt. tung oil, 3-6 pts. wt. waste syrup, 1-2 pts. wt. sodium lauroyl sarcosine, 3-5 pts. wt. fir rubber, 4-8 pts. wt. asbestos, 8-10 pts. wt. additives and remainder of water. The nano-active agent comprises magnesium oxide, alumina, silicon nitride and boron nitride in weight ratio of 1:2:3:1. The additive is obtained by dispersing magnesium-aluminum hydrotalcite in deionized water, dripping solution comprising sodium dihydrogen phosphate dissolved in water, heating, stirring, adjusting pH to 3.7 using acetic acid, refluxing resultant mixture at room temperature for 3 hours, cooling, washing using deionized water, filtering, adjusting pH to 7 and drying. The nano-graphene is obtained by adding sulfuric acid to graphene, stirring at -20 to -10 degrees C for 5-12 hours and 0-5 degrees C for 5-12 hours, respectively, adding potassium permanganate, oxidizing, obtaining oxidized graphene solution adding cetyltrimethylammonium bromide, flocculating, obtaining modified graphene, filtering, washing and vacuum-drying at 50 degrees C for 24 hours. An INDEPENDENT CLAIM is included for preparation of vacuum-type polyethylene composite nano-vacuum building material.