▎ 摘　　要

NOVELTY - Preparing leather-core structure elastic electrically driven thermochromism sensing fiber, comprises e.g. (i) soaking the polyurethane fiber in N,N-dimethylformamide solution to swelling, (ii) placing polyurethane fiber processed in step (i) into ultra-pure water, adding ferric chloride, ultrasonically processing to make it evenly dispersed in solution, then adding tannic acid ultrasonic treatment to make it evenly dispersed in solution, adding tris(hydroxymethyl)aminomethane buffer solution and ultrasonically processing, (iii) immersing the surface-modified polyurethane fiber in step (ii) in the graphene solution after peeling the cellulose nanocrystalline, carrying out ultrasonic treatment and cycling, (iv) taking the graphene/polyurethane conductive composite fiber prepared in the step (iii) as core, polyurethane particles, N,N-dimethylformamide and thermochromic ink as the spinning solution through double-nozzle electrostatic spinning core-spun yarn technology. USE - The method is useful for preparing leather-core structure elastic electrically driven thermochromism sensing fiber. ADVANTAGE - The composite structure fiber has excellent mechanical properties and electrothermal properties; and utilizes power and electricity to synergistically enhances thermally induced discoloration; and is durable. DETAILED DESCRIPTION - Preparing leather-core structure elastic electrically driven thermochromism sensing fiber, comprises (i) soaking the polyurethane fiber in N,N-dimethylformamide solution for 1.5-2.5 hours to swelling, (ii) placing polyurethane fiber processed in the step (i) into 90-110 ml ultra-pure water, then adding ferric chloride, ultrasonically processing to 9-12 seconds to make it evenly dispersed in the solution, then adding tannic acid ultrasonic treatment for 8-11 seconds to make it evenly dispersed in the solution, adding tris(hydroxymethyl)aminomethane buffer solution and ultrasonically processing for 50-70 seconds to finish the surface modification of the polyurethane fiber, (iii) immersing the surface-modified polyurethane fiber in the step (ii) in the graphene solution after peeling the cellulose nanocrystalline, carrying out ultrasonic treatment for 1-2 hours and cycling 4-8 times to complete the preparation of graphene/polyurethane conductive composite fiber, (iv) taking the graphene/polyurethane conductive composite fiber prepared in the step (iii) as core, polyurethane particles, N,N-dimethylformamide and thermochromic ink as the spinning solution through double-nozzle electrostatic spinning core-spun yarn technology to obtain final product. An INDEPENDENT CLAIM is also included for leather-core structure elastic electrically driven thermochromism sensing fiber, obtained by above method.