▎ 摘　　要

NOVELTY - A composite dust suction-type graphene modified calcium silicate brick 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. foamed alumina, 5-8 pts. wt. nano-cerium oxide powder, 15-20 pts. wt. polylactic acid chitosan, 10-15 pts. wt. nano-graphene, conductive mica powder, nano-conductive graphite powder, trimer of polyisocyanate, Teflon (RTM: PTFE) fiber, sea mud, polyvinyl acetate, tung oil, waste syrup, sodium lauroyl sarcosinate, abandoned plastic, asbestos cashmere, additive and water. USE - Composite dust suction-type graphene modified calcium silicate brick (claimed). ADVANTAGE - The composite dust suction-type graphene modified calcium silicate brick is environmentally-friendly. The pore size and specific surface area of the composite adsorbent film are improved, and efficacy of the composite adsorbent film is enhanced. DETAILED DESCRIPTION - A composite dust suction-type graphene modified calcium silicate brick 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. foamed alumina, 5-8 pts. wt. nano-cerium oxide powder, 15-20 pts. wt. polylactic acid chitosan, 10-15 pts. wt. nano-graphene, 0.3-0.5 pt. wt. conductive mica powder, 0.2-0.4 pt. wt. nano-conductive graphite powder, 0.8-1 pt. wt. trimer of polyisocyanate, 1-2 pts. wt. Teflon (RTM: PTFE) fiber, 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 sarcosinate, 3-5 pts. wt. abandoned plastic, 4-8 pts. wt. asbestos cashmere, 6-8 pts. wt. additive and appropriate amount of water. The nano-active agent comprises magnesium oxide, aluminum oxide, silicon nitride and boron nitride in a weight ratio of 1:2:3:1. The additive is prepared from a certain amount of magnesium aluminum hydrotalcite dispersed in carbon dioxide removed de-ionized water to prepare a slurry, and then dissolving excess sodium dihydrogen phosphate in water to prepare a solution, slowly pouring into the slurry, heating and stirring with acetic acid to adjust the pH to 3.7, reacting for 3 hours at reflux temperature, naturally cooling, and washing with carbon dioxide removed deionized water, and filtering until the filtrate has pH of 7, and then drying. The nano-graphene is prepared by adding concentrated sulfuric acid to the graphite, stirring at low temperature of -20 degrees C to -10 degrees C for 5-12 hours, after stirring at 0-5 degrees C for 5-12 hours, then adding potassium permanganate for oxidation reaction to obtain graphite oxide solution, directly adding the obtained graphite oxide solution into cetyl trimethylammonium bromide, obtaining modified graphite oxide solution by flocculation and modification of cetyl trimethylammonium bromide, filtering the modified graphite oxide solution, washing, and drying at 50 degrees C for 24 hours under vacuum condition to obtain nano-graphene. An INDEPENDENT CLAIM is included for preparation of composite dust suction-type graphene modified calcium silicate brick, which involves (i) adding ethylene-vinyl acetate copolymer, high polyethylene, nano-active agent, foamed alumina, nano-cerium oxide powder, conductive mica powder, nano-conductive graphite powder, trimers of polyisocyanates, Teflon (RTM: PTFE) fiber and sea mud mixing, grinding, then adding waste syrup, sodium lauroyl sarcosinate, additive and water, stirring to obtain the mixture, (ii) extruding the mixture through a vacuum brick extruder brick at 0.5-0.8 MPa vacuum degree of brick extruder and extrusion pressure of 6-10 MPa, (iii) drying the bricks under natural conditions for 10-12 days and sintering at 800-900 degrees C, (iv) adding abandoned plastic, tung oil, and polyvinyl acetate, mixing at 80-90 degrees C at a speed of 800-1000 rpm for 5-10 minutes, and then uniformly spraying on a surface of the bricks, keeping the temperature at 100-120 degrees C for 2-4 hours, adding polylactic acid chitosan and nano-graphene, mixing, magnetically stirring for 5-6 hours to form a uniform and stable transparent solution, loading of graphene between one layer and other layer by electro-spraying, and then cooling.