Phase-change microsphere, multifunctional phase-change temperature-adjustment fiber, preparation method for phase-change microsphere and preparation method for multifunctional phase-change temperature-adjustment fiber

Abstract

The invention discloses a phase-change microsphere, a multifunctional phase-change temperature-adjustment fiber, a preparation method for the phase-change microsphere and a preparation method for themultifunctional phase-change temperature-adjustment fiber. The preparation method for the phase-change microsphere comprises the steps that firstly, spray drying and thermal expansion treatment are carried out on a graphene oxide aqueous solution so as to obtain a graphene microsphere body with a mesoporous structure, and then phase-change materials are melted and fully permeate into a cavity of the graphene microsphere body so as to obtain the phase-change microsphere with a core-shell structure. The preparation method for the multifunctional phase-change temperature-adjustment fiber comprises the steps that redundant phase-change materials on the surfaces of phase-change microspheres are removed through a pressure filtration method, cooling is carried out, and then the phase-change microspheres and spinning-grade polymer slices are melted and blended for spinning so as to obtain the multifunctional phase-change temperature-adjustment fiber. The phase-change microsphere, the multifunctional phase-change temperature adjustment fiber, the preparation method for the phase-change microsphere and the preparation method for the multifunctional phase-change temperature-adjustment fiber have the advantages that the graphene hollow spheres are wrapped around the phase-change materials, so that the leakage of the phase-change materials in the use process is greatly reduced, and the service life can be remarkably prolonged; the thermal conductivity of graphene is high, so that the heat exchange between the environment and fabric as well as between the fabric and the human body surface can be effectively promoted, and the heat response speed of the heat storage fabric can be increased; and in addition, the graphene has the characteristics of being high in conductivity, antibacterial, ultraviolet-proof and capable of realizing far-infrared emission, so that the fabric can be endowed with multiple new functions.

Description

technical field [0001] The invention belongs to the field of fibers, and in particular relates to a phase-change microsphere, a multifunctional phase-change temperature-regulating fiber and a preparation method thereof. Background technique [0002] Phase change materials are a class of materials that have the potential to absorb or release a large amount of heat during the phase change process. During the phase change, although the temperature remains unchanged, it is accompanied by a large amount of heat release or absorption. Phase-change temperature-regulating fiber is a kind of fiber with heat storage and temperature-regulating function prepared by doping phase-change temperature-regulating materials into fibers. Phase-change temperature-regulating fibers can use the phase-change materials in them when the temperature of the external environment changes. During the phase transition process, heat exchange is performed with the external environment to realize the function...

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Problems solved by technology

However, these two methods have great defects. The former only improves the overall thermal conductivity of the material, but the phase change performance has not been improved. The latter uses modified graphene and graphene oxide to coat the phase. Not only is it difficult to ensure the effective coating of phase change materials, but also it is impossible to improve the overall thermal conductivity of the material

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