▎ 摘　　要

NOVELTY - Geothermal pipe comprises resin composite containing 0.1-10 pts. wt. graphene compound directly combined to the surface through intermediation functional groups i.e. 5-30C alkyl group, and 100 pts. wt. polyolefin resin. USE - Used as geothermal pipe. ADVANTAGE - The pipe prevents corrosion caused by prolonged exposure to fluid; and has geothermal heating and cooling properties, high efficiency, high thermal conductivity and good mechanical property.