▎ 摘　　要

NOVELTY - Double-layer capsule wall energy storage temperature-regulating microcapsule comprises a capsule core, a first capsule wall wrapping the capsule core, and a second capsule wall wrapping the first capsule wall. The capsule core is a phase change material. The first capsule wall is polymethyl methacrylate modified with allyl methacrylate. The second capsule wall is polyacrylonitrile. USE - Used as double-layer capsule wall energy storage temperature-regulating microcapsule. ADVANTAGE - The method: increases the structural stability of the microcapsules; improves the compatibility of the double-walled energy storage and temperature-regulating microcapsules with the polyacrylonitrile spinning solution; uniformly disperses the double-walled energy storage and temperature regulation microcapsules in the polyacrylonitrile spinning solution; increases the stability of the polyacrylonitrile fiber; and improves the stability of the energy storage and temperature regulation of the polyacrylonitrile fiber. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the microcapsules, comprising (1) mixing phase change material, methyl methacrylate, allyl methacrylate, emulsifier, first initiator and water to obtain an emulsion, subjecting the obtained emulsion to a first emulsion polymerization reaction to obtain primary energy storage temperature-regulating microcapsules, where the primary energy storage temperature-regulating microcapsules include a capsule core and a first capsule wall surrounding the capsule core, the first capsule wall is polymethyl methacrylate modified with allyl methacrylate, and (2) mixing the primary energy storage temperature-regulating microcapsules with acrylonitrile to obtain a mixed emulsion, mixing the mixed emulsion and the second initiator, and carrying out second emulsion polymerization reaction to obtain the double-walled energy storage and temperature-regulating microcapsules; and (2) preparing the polyacrylonitrile fiber, comprising mixing double-layer capsule wall energy storage and temperature-regulating microcapsules, the antistatic agent dispersion liquid and the original polyacrylonitrile spinning solution to obtain a spinning mother liquor, where the original polyacrylonitrile spinning solution comprises sodium thiocyanate and polyacrylonitrile, mixing the spinning mother liquor with the original polyacrylonitrile spinning solution to obtain a polyacrylonitrile spinning solution, and spinning the polyacrylonitrile spinning solution to obtain the polyacrylonitrile fiber.