▎ 摘　　要

NOVELTY - Preparing hollow tube automobile engine involves placing water glass, graphene and tetrabutyl titanate in dilute sulfuric acid to be soaked, washed and dried to obtain modified silica gel. The expanded vermiculite, 3-aminopropyltriethoxy silane, graphite and hydrochloric acid solution are mixed for contact reaction with hydrochloric acid solution. The obtained mixture is filtered. The filter cake is taken to obtain the activated to obtain the activated modifier. USE - Method for preparing hollow tube automobile engine. ADVANTAGE - The method enables to prepare hollow tube automobile engine with excellent mechanical strength and heat and oil resistance properties. DETAILED DESCRIPTION - Preparing hollow tube automobile engine involves placing water glass, graphene and tetrabutyl titanate in dilute sulfuric acid to be soaked, washed and dried to obtain modified silica gel. The expanded vermiculite, 3-aminopropyltriethoxy silane, graphite and hydrochloric acid solution are mixed for contact reaction with hydrochloric acid solution. The obtained mixture is filtered. The filter cake is taken to obtain the activated to obtain the activated modifier. The obtained to obtain the activated modifier is added with neoprene, fluorine rubber, polycaprolactam, cyclodextrin, kaolin, beeswax, sulfur, stearates, zinc chloride, sodium tungstate, the modified silica gel and activation modifying agent. The obtained mixture is milled, and then molded to obtain the heat resistant automobile engine hollow pipe. In 100 pts. wt. of the water glass The dosage of the graphite alkene is 1-1.8 pts. wt.. The dosage of the tetrabutyl titanate is 2.5-3.2 pts. wt.. The amount of the diluted sulfuric acid is 300-500 pts. wt.. The drying temperature is 500-550 degrees C. The drying time is 1-2 hours. In 100 pts. wt. of the expanded vermiculite The dosage amount of 3-aminopropyltriethoxy silane is 5-10 pts. wt.. The dosage of the graphite is 3-8 pts. wt. The dosage of the hydrochloric acid solution is 150-200 pts. wt.. The reaction temperature is 80-90 degrees C. The reaction time is 8-12 hours. In 100 pts. wt. of the neoprene the dosage of the fluorine rubber is 55-62 pts. wt.. The dosage of polycaprolactam is 17-28 pts. wt.. The dosage of the cyclodextrin is 8-13 pts. wt.. The dosage of kaolin is 10-15 pts. wt.. The amount of the beeswax is 22-29 pts. wt.. The content of sulfur is 10-17 pts. wt.. The dosage of the stearate is 3.5-8 pts. wt.. The dosage of the zinc chloride is 5-9 pts. wt.. The dosage of the sodium tungstate is 5.5-8.5 pts. wt.. The dosage of the modified silica gel is 21-26 pts. wt.. The dosage of activating agent is 30-34 pts. wt..