Preparation and Application of Microcapsule with Phase Transition Temperature

The present invention discloses a microcapsule with phase transition temperature as well as its preparation method and application, belonging to the material technology. It further includes core material of phase-change material (PCM) and wall material that wraps the core material. Taking PCM paraffin as the core material, toluene-2,4-diisocyanate (TDI) and hexamethylene diamine as the wall material and hydrolyzate of synthetic copolymer styrene-maleic anhydride (SMH) as the emulsifier, the present invention adopts in-situ polymerization technology to coat PCM inside the microcapsule to prepare microcapsule with property of phase transition temperature. Then the influence of experimental parameters on the synthesis of microcapsule is studied through orthogonal experiments so as to determine the final synthesis process of microcapsule. The specific technical indexes are that the average particle diameter of temperature-regulating microcapsule is about 1 pm, and the phase transition temperature is 34 39'C. The technical indexes of the phase-change temperature-regulating fibre of the invention are as follows: the average breaking strength of the viscose-based microcapsule phase-change temperature-regulating fibre is 18.97cN/tex, and the average breaking elongation is 1 3 .1%.