▎ 摘　　要

NOVELTY - Preparing coaxial electro-thermochromic liquid crystal fiber involves dispersing sodium alginate, glucose, and black conductive polymer in solvent and mixed uniformly to obtain injection 1; dispersing sodium alginate, glucose, and cholesteric liquid crystal in solvent and mix uniformly to obtain injection 2; adding calcium chloride to water to disperse uniformly to obtain calcium chloride coagulation bath; injecting injection 1 and injection 2 in calcium chloride coagulation bath through coaxial syringe, where calcium ions in calcium chloride coagulation bath guide sodium alginate to migrate outward to form polymer nanofluid which is double layer structure of coaxial electrochromic liquid crystal fiber. USE - Method for preparing coaxial electro-thermochromic liquid crystal fiber used as military protective concealment material in flexible display, anti-counterfeiting signs or safety warnings or artistic ornaments (claimed). ADVANTAGE - The method for preparing coaxial electrothermal color-changing liquid crystal fiber enables to achieve continuous and stable state of certain color-changing state; has good solvent resistance and water resistance, which meets application in field of wearable color-changing clothing. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a coaxial electrochromic liquid crystal fiber with coaxial double-layer structure, which comprises outer layer, which is cholesteric liquid crystal layer; inner layer, which is black conductive fiber layer, and mass ratio of black conductive fiber layer to cholesteric liquid crystal layer, which is 100:5-30.