▎ 摘　　要

NOVELTY - Silane-modified geogrid comprises 3-4 pts. wt. polytetrahydrofuran ether diol, 0.1-0.2 pts. wt. hexafluoroacetylacetone, 5-7 pts. wt. oxidized graphene, 40-50 pts. wt. para-hydroxybenzoic acid, 10-17 pts. wt. acetic anhydride, 0.08-0.1 pts. wt. zinc acetate, 20-30 pts. wt. 6-hydroxy-2-naphthoic acid, 180-200 pts. wt. high-density polyethylene, 0.3-1 pts. wt. lithium silicate, 0.4-1 pts. wt. gamma-aminopropyltriethoxysilane, 1-2 pts. wt. polyethyleneimine, 0.1-0.2 pts. wt. zinc naphthenate, 4-5 pts. wt. dioctyl azelate, and 2-3 pts. wt. borax. USE - Silane-modified geogrid. ADVANTAGE - The silane-modified geogrid has improved hydrophobicity and impermeability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing silane-modified geogrid, which involves: (A) taking 60-70 wt.% acetic anhydride, mixing with parahydroxybenzoic acid, adding to oil bath at a temperature of 138-140 degrees C, stirring for 10-15 minutes, adding 96-98% sulfuric acid at an amount of 0.01-0.02 wt.% of the mixture, heating the reaction solution for 3-5 hours, discharging, filtering, and pouring the reaction solution in a mold to heat along with 1.6-2 times the weight of ice water, placing for 3-5 minutes, and subjecting to blast drying, followed by drying in a vacuum drying oven at a temperature of 50-60 degrees C for 20-24 hours to obtain acetylation monomer A; (B) mixing 6-hydroxy-2-naphthoic acid with the remaining acetic anhydride, adding to an oil bath at a temperature of 120-130 degrees C for 3-4 hours, pouring the material into ice water at an amount of 1.6-2 times the weight, placing for 3-5 minutes, adding borax, stirring uniformly, blow drying, and then drying in a vacuum drying oven at a temperature of 50-60 degrees C for 20-24 hours to obtain acetylation monomer B; (C) mixing hexafluoroacetylacetone and zinc naphthenate, adding 6-10 times of the weight of the mixture to the anhydrous ethanol, and stirring uniformly to obtain an alcoholic solution; (D) taking the oxidized graphene, adding it 100-120 times the weight of the absolute ethanol, subjecting to ultrasonic dispersion for 50-60 minutes, sequentially adding the acetylated monomer A and monomer B, treating ultrasonically for 30-40 minutes, adding alcohol solution, stirring uniformly, subjecting to vacuum distillation, and drying the product in a vacuum drying oven at a temperature of 60-70 degrees C for 20-25 hours to obtain monomer pre-treated graphene; (E) adding polyethyleneimine to 15-17 times the weight of absolute ethanol, adding polytetrahydrofuran ether diol, treating at a raised temperature of 60-65 degrees C along with stirring for 2-3 minutes, adding monomer pre-treating graphene and gamma-aminopropyltriethoxysilane, stirring for 10-14 minutes at 100-200 revolutions per minute (rpm), filtering, washing the precipitate 2-3 times with water, and subjecting to vacuum drying at a temperature of 50-60 degrees C for 30-40 minutes to obtain modified monomer pre-treated graphene; (F) mixing the single-modified pre-treated graphene and zinc acetate, adding into a reaction kettle under nitrogen protection, treating at a raised temperature of 240-250 degrees C for 3-4 hours, treating again at a temperature of 270-280 degrees C for 1-2 hours, continuously treating at a raises temperature of 290-300 degrees C for 30-40 minutes, and discharging the material to cool to obtain the graphene co-polyester composite material; and (G) mixing the graphene co-polyester composite material with the remaining raw materials, stirring uniformly, feeding into an extruder and melt-extruding, pressing the melt into a plate by a three-roll pressing machine, and subjecting to stretching to obtain the geogrid.