▎ 摘　　要

NOVELTY - Bio-based fully-degradable suction pipe comprises 18-30 wt.% polybutylene adipate terephthalate (PBAT) thermoplastic biodegradable plastic, 20-30 wt.% PGA, 10-20 wt.% graphene modified epoxy resin, 1-3 wt.% silver nano ion powder, 2-5 wt.% eggshell powder, 3-8 wt.% hemp fiber powder, 2-8wt.% plasticizer, 3-8 wt.% silica, 15-30 wt.% starch masterbatch, and 5-10 wt.% polyethylene copolymer. The starch masterbatch comprises 60-70 wt.% non-grain starch, 1-3 wt.% silane coupling agent, 1-3 wt.% paraffin, 20-30 wt.% glycerol, 0.1-0.3 wt.% citric acid, 2-5 wt.% epoxidized soybean oil, 1-5 wt.% pigment, and 1-3 wt.% antioxidant. USE - The bio-based fully-degradable suction pipe is useful for suction of water or other liquid. ADVANTAGE - The bio-based fully-degradable suction pipe is environment-friendly and non-toxic, and has high strength, good stability and good biodegradation performance, and performance index meeting the national standards. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation method of bio-based fully-degradable suction pipe comprising (S001) placing each raw materials into a mixing machine to mix uniformly, adding PBAT thermoplastic biodegradable plastic, PGA, starch master batch into the mixing machine to mix uniformly, and then the silver nano-ion powder, egg shell powder, placing the fiber powder into the mixing machine to mix uniformly, at last, graphene, modified epoxy resin, plasticizer, white carbon black, polyethylene copolymer into the mixing machine to mix uniformly, forming the mixed material; (S002) adding the mixed material into the refining machine for refining, when refining the mixed material in the refining machine, the temperature change in the refining machine is mainly divided into four stages, where the first stage: 25-45 degrees Celsius; second stage: 45-60 degrees Celsius; third stage: 60-120 degrees Celsius, the fourth stage: 120-140 degrees Celsius, where the critical temperature between the first stage and the second stage needs to stop heating for 10 minutes, the second stage and the third stage critical temperature need to stop heating for 15 minutes, the third stage temperature reaches 80 degrees Celsius; stopping heating and refining for 20 minutes and thermally insulating of the refining machine is not changed, the third stage temperature reaches 120 degrees Celsius, stopping heating and refining for 10 minutes and thermally insulating of the refining machine is not changed, the fourth stage temperature reaches 130 degrees Celsius, stopping heating and refining for 10 minutes and thermally insulating of the refining machine is not changed; (S003) introducing the raw material obtained in step S002 into the granulating machine to obtain the biodegradable plastic particle, where the discharging port of the granulating machine is provided with a cooling device, and the high temperature biodegradable plastic particle produced by the pelleting machine is cooled by the cooling device, (S004) heating the biodegradable plastic particles to the molten state, and injecting into the suction mold, then opening the mold after cooling to prepare the bio-based fully-degradable suction pipe.