▎ 摘　　要

NOVELTY - Method for preparing a temperature-sensitive flexible sensor from bio-based Eucommia gum involves (a) (a1) dissolving 1-2 g graphene oxide (GO) in 400-1000 ml deionized water, adjusting the pH with aqueous ammonia, and using an ultrasonic cell pulverizer to ultrasonically process the GO solution, stirring and refluxing, reacting to obtain a functionalized graphene solution, namely arginine (Arg) solution, (a2) centrifuging, and drying, (a3) mixing the dispersion of functionalized graphene and filler with Eucommia gum solution at low temperature, performing flocculation, and (a4) kneading the Eucommia rubber composite material and vulcanizing agent and other additives, (b) (b1) adding functionalized graphene and fillers into an organic solvent, and dispersing in an ice bath, (b2) preparing Eucommia gum solution by dissolving in an organic solvent, and (b3) the mass ratio of the sum of functionalized graphene and fillers to Eucommia glue is 1:10-1:2 to obtain the product. USE - The method is used for preparing a temperature-sensitive flexible sensor from bio-based Eucommia gum which is used as a medical alarm material and a temperature warning material in various shapes. ADVANTAGE - The method ensures excellent dispersibility, thermal stability, electrical conductivity and mechanical properties, and develops a new elastomer material with temperature sensitivity. DETAILED DESCRIPTION - Method for preparing a temperature-sensitive flexible sensor from bio-based Eucommia gum involves (a) (a1) dissolving 1-2 g graphene oxide (GO) in 400-1000 ml deionized water to form a graphene oxide solution, adjusting the pH of the GO solution to 8-9 with aqueous ammonia, and using an ultrasonic cell pulverizer to ultrasonically process the GO solution for 1-2 hours, obtaining the GO aqueous solution, continuously heating to 90-100degrees Celsius, stirring and refluxing, adding the modifier to the GO aqueous solution, and stopping the reaction after 5-9 hours to obtain a modified GO dispersion, adding 1-2 ml of reducing agent to the modified GO dispersion, and reacting for 6-8 hours to obtain a functionalized graphene solution, namely arginine (Arg) solution, (a2) after cooling the Arg solution to room temperature, centrifuging the Arg solution three times with a centrifuge for 10 minutes each time, with an interval of 5 minutes, after each centrifugation, removing the lower layer, and drying the supernatant to obtain pure functionalized graphene, (a3) mixing the dispersion of functionalized graphene and filler with Eucommia gum solution at low temperature and ultrasonically, and after mixing uniformly, performing flocculation by flocculant to obtain the Eucommia gum composite material, and (a4) kneading the Eucommia rubber composite material and vulcanizing agent and other additives, and after mixing evenly, vulcanizing molding to obtain the material of the desired shape, (b) (b1) adding functionalized graphene and fillers into an organic solvent, and ultrasonically dispersing in an ice bath to obtain a dispersion of functionalized graphene and fillers, where the ratio of the sum of functionalized graphene and fillers to the organic solvent is 1 g: 50- 300 ml, the ultrasonic temperature is 3-8degrees Celsius, (b2) preparing Eucommia gum solution by dissolving bio-based Eucommia gum material in an organic solvent, where the ratio of bio-based Eucommia gum to organic solvent is 10 g: 100-200 ml, and the dissolving temperature is 60-75degrees Celsius and (b3) the mass ratio of the sum of functionalized graphene and fillers to Eucommia glue is 1:10-1:2 to obtain the product.