▎ 摘　　要

NOVELTY - Wear-resistant polyethylene comprises: 70 pts. wt. modified polyethylene, 10 pts. wt. modified lignin sodium and 10 pts. wt. cellulose modified graphene oxide. The preparation method of wear-resistant polyethylene comprises e.g. mixing aldehyde-based cellulose and graphene oxide in a flask, adding N, N'-dimethylformamide, mixing, adding aldehyde-based cellulose and ammonium persulfate into the flask, reacting, adding triethylenediamine, stirring and reacting, filtering to obtain filter cake, washing filter cake, freezing and drying to obtain cellulose modified graphene oxide; mixing the modified lignin sodium blank with ethanol aqueous solution, allowing to stand, filtering and drying to obtain modified lignin sodium; mixing cellulose modified graphene oxide and modified polyethylene, adding modified lignin sodium, melting, extruding, and granulating. USE - Wear-resistant polyethylene used as synthetic polymer compound. Uses include but are not limited to stationery product, catering product, packaging article, laboratory test, industrial and agricultural protection, dyeing and nursing. ADVANTAGE - The wear-resistant polyethylene has excellent wear-resisting property when friction with metal. The modified chitosan oxide and cellulose-modified graphene oxide after adding the product can be uniformly dispersed in the product under the action of maleic anhydride, and still keeps the sheet structure. Therefore, the two modified graphene oxide can improve the lubricating performance of the polypropylene after adding polypropene, so as to improve the wear resistance of the product. The graphene oxide layer surface is rugged, therefore, when the product friction can reduce the product of the contact, thus improving the friction performance of product. DETAILED DESCRIPTION - Wear-resistant polyethylene comprises: 70 pts. wt. modified polyethylene, 10 pts. wt. modified lignin sodium and 10 pts. wt. cellulose modified graphene oxide. The preparation method of wear-resistant polyethylene comprises (1) mixing aldehyde-based cellulose and graphene oxide according to mass ratio of 1: 1 in a flask, adding N, N'-dimethylformamide with a mass of 80 times the graphene oxide into a flask, stirring and mixing, adding 0.06 times the mass of aldehyde-based cellulose and ammonium persulfate into the flask, stirring and reacting for 10 minutes at 50℃, then adding triethylenediamine with 5 times the mass of aldehyde-based cellulose into the flask, continuously stirring and reacting for 3 hours at 50℃, filtering to obtain the filter cake, washing the filter cake for 3 times by using deionized water and ethanol, freezing and drying to obtain the cellulose modified graphene oxide; (2) mixing the sodium lignin sulfonate and water according to mass ratio of 1: 40 in a three-port flask, using 5% sodium hydroxide solution to adjust the pH of the material in the three-port flask to 11, adding potassium iodide with 0.01 times the mass of sodium lignosulfonate and 10% 1,6-dibromohexane ethanol solution with a mass fraction of 2 times the mass of sodium lignosulfonate in a three-port flask, stirring and reacting for 6 hours at 80℃, mixing and extracting material with petroleum ether according to volume ratio of 1:1 for 30 minutes, filtering, removing the upper layer liquid, freezing and drying the lower layer liquid, obtaining modified lignin sodium blank, mixing the modified lignin sodium blank with 75% ethanol aqueous solution according to mass ratio of 1:30, allowing to stand for 4 hours, filtering, drying to constant weight to obtain modified lignin sodium; (3) mixing the cellulose modified graphene oxide and the modified polyethylene according to mass ratio of 1:7, and adding modified lignin sodium of 1 time the mass of cellulose-modified graphene oxide, melting and extruding, granulating to obtain wear-resistant polyethylene. The preparation of aldehyde-based cellulose comprises mixing the microcrystalline cellulose and water according to mass ratio of 1: 75, and using 0.1mol/l hydrochloric acid to adjust the pH to 3, then adding potassium periodate with 0.4 times the mass of microcrystalline cellulose, stirring and reacting for 8 hours at 40℃, filtering, washing until the washing liquid is neutral, freezing and drying to obtain the aldehyde-based cellulose. The preparation of modified polyethylene comprises mixing the polyethylene and maleic anhydride according to mass ratio of 4:1 into an extruder, and adding dicumyl peroxide of 0.01 times of the mass of polyethylene into the extruder, controlling the host frequency at 30 Hz, and feeding frequency at 15 Hz, melting and extruding at 160℃ to obtain modified polyethylene. The polyethylene is linear low density polyethylene. The melt extrusion condition is: the host frequency is 35 Hz, the feeding frequency is 15 Hz, the extrusion temperature is 160℃.