MATERIAL HAVING THERMOCHROMIC EFFECT AND PREPARATION METHOD THEREFOR, AND THERMOCHROMIC SMART WINDOW

摘要

The present invention provides a material having a thermochromic effect and a preparation method therefor, and a thermochromic smart window. The method comprises the following steps: carrying out a hydrothermal reaction on raw materials vanadyl sulfate and ammonium tungstate to obtain V _1-xW _xO ₂ powder; dispersing the V _1-xW _xO ₂ powder in a solvent, and adding a reactive monomer and a dispersant to carry out hydrolysis and condensation reactions under the action of a catalyst to obtain V _1-xW _xO ₂@SiO ₂ composite powder; and enabling an emulsion polymerization reaction of the V _1-xW _xO ₂@SiO ₂ composite powder and N-isopropylacrylamide in nitrogen and heating conditions under the action of a cross-linking agent and an initiator to obtain a V _1-xW _xO ₂@SiO ₂/PNIPAM composite solution. The material of the present invention has the advantages of high visible light transmittance, high variable temperature spectrum regulation efficiency, high photo-thermal stability, high adaptability, etc.