▎ 摘　　要

NOVELTY - Preparing recycled plastic tile with a hollow structure comprises e.g. (1) providing 100-110 pts. wt. pretreated straw powder, 0.1-1 pts. wt. graphene nano-sheet, 1-4 pts. wt. cationic surfactant, 2-10 pts. wt. mineral filler, 4-10 pts. wt. coupling agent, 20-40 pts. wt. recycled plastic particles, 2-5 pts. wt. compatibility agent, 1-5 pts. wt. lubricant, 1-3 pts. wt. coloring agent, 1-3 pts. wt. antioxidant, and 1-3 pts. wt. light stabilizer, placing the pre-treated straw powder in a high-speed mixer, preheating to 105-110 degrees C, adding graphene nano-sheets, cationic surfactants, mineral fillers, and coupling agents, and thoroughly mixing to obtain modified straw powder, (2) pouring the modified straw powder, recycled plastic particles, compatibilizers, lubricants, colorants, antioxidants and light stabilizers into the mixer and mixing thoroughly to obtain a mixture, and (3) adding mixture into the pelletizer, extruding, adding masterbatch into the pellet inlet of cooling device. USE - The method is useful for preparing recycled plastic tile with a hollow structure. ADVANTAGE - The hollow structure: is a good dispersant; and has high specific surface area, low density, high elastic modulus and good mechanical properties, and good bactericidal effect, which can efficiently disperse graphene nano-sheets in straw powder, prevents mildew of straw-plastic complex products; and improves the compatibility of straw and polymer substrate. The method is simple, green and environmentally friendly; reduces the moisture content and volatile components of straw fibers, and makes the straw-plastic complex products more beautiful in appearance. DETAILED DESCRIPTION - Preparing recycled plastic tile with a hollow structure comprises (1) providing 100-110 pts. wt. pretreated straw powder, 0.1-1 pts. wt. graphene nano-sheet, 1-4 pts. wt. cationic surfactant, 2-10 pts. wt. mineral filler, 4-10 pts. wt. coupling agent, 20-40 pts. wt. recycled plastic particles, 2-5 pts. wt. compatibility agent, 1-5 pts. wt. lubricant, 1-3 pts. wt. coloring agent, 1-3 pts. wt. antioxidant, and 1-3 pts. wt. light stabilizer, placing the pre-treated straw powder in a high-speed mixer, preheating to 105-110 degrees C, adding graphene nano-sheets, cationic surfactants, mineral fillers, and coupling agents, and thoroughly mixing to obtain modified straw powder, (2) pouring the modified straw powder, recycled plastic particles, compatibilizers, lubricants, colorants, antioxidants and light stabilizers into the mixer and mixing them thoroughly to obtain a mixture, (3) adding the mixture into the pelletizer, extruding to obtain the masterbatch, adding the masterbatch into the pellet inlet of the cooling device, turning on the cooling water pump, where the cooling water pump extracts the cooling water from the cooling water tank and delivering to the cooling chamber through the water outlet pipe, where two guide plates guide the masterbatch and cooling water between the two cleaning mechanisms, the output shaft of the drive motor drives the pulley to rotate, and the two pulleys drive the two scraping wheels to rotate, the scraping wheel drives the scraping belt to rotate, the two scraping belts scrape away the stains on the surface of the masterbatch, absorbing the stains on the scraping belt by the scraping wheel, where the scraping plate scrapes the stains on the scraping wheel into the dirt storage tank for storage, introducing the masterbatch and cooling water to the particle hopper, the first motor drives the first spindle to rotate through the first reducer, and the first spindle drives the first pull rod to rotate through the first rotary joint, the first pull rod pulls the bucket door, and the masterbatch and cooling water in the particle bucket enter the guide bucket, the second motor drives the second main shaft to rotate through the second reducer, the second main shaft drives the short pull rod and the second pull rod to rotate through the second rotary joint. the first rotating arm, the beating block on the second rotating arm beats the masterbatch, and then the masterbatch falls into the conveying pipe, and the cooling water flows into the bottom of the cooling chamber through the water outlet, discharging the cooling water through the drain pipe, turning on the conveying motor, the output shaft of the conveying motor drives the conveying dragon to rotate, and the conveying dragon will transport the masterbatch to the discharge pipe, and obtain the cooled masterbatch from the discharge pipe, and (4) adding the masterbatch into the injection molding machine, the injection molding machine injects the masterbatch into the hollow recycled plastic tile mold, opening the mold, and obtains the recycled plastic tile with a hollow structure.