LATENT HEAT TRANSFER MATERIAL MICRO-ENCAPSULATED IN HARD SHELL, AND PRODUCTION METHOD FOR SAME

摘要

Provided is a latent heat transfer material that is micro-encapsulated, said material exhibiting superior mechanical strength and heat resistance, and being able to recycle high-temperature excess heat and easily transfer heat to a location where the heat is needed. The latent heat transfer material that is micro-encapsulated in a hard shell comprises an imperforate hollow silica particle that encases a phase change material which absorbs and emits latent heat in response to temperature change. A production method for the same comprises: 1) a step in which a perforate hollow silica particle is manufactured; 2) a step in which the phase change material (hydrogen phosphate-2-sodium) is sealed inside the perforate hollow silica particle by inserting the perforate hollow silica particle in a molten solution of the phase change material (hydrogen phosphate-2-sodium) and repeatedly subjecting the same to vibrations such as ultrasound oscillations; 3) a step in which the perforate hollow silica particle having the phase change material (hydrogen phosphate-2-sodium) sealed within is washed in a saturated aqueous solution of the phase change material (hydrogen phosphate-2-sodium); and 4) a step in which perhydropolysilazane is used to coat the outer shell of the perforate hollow silica particle with silica.