Phase-change energy-storage ultra-fine composite fiber and preparation method and application thereof

Abstract

The invention relates to a phase-variable energy storage ultra-fine composite fiber, relative production and application, wherein said fiber can be formed by polymer carrier and phase-variable material in different quality ratio; said phase-variable material is distributed inside the fiber or on the surface of fiber; the phase-variable material on the surface of fiber is crosslinked to the polymer carrier via crosslinker, to be fixed on the surface, to obtain the phase-variable energy-storage ultra-fine composite fiber. The invention can keep the shape of fiber before and after phase change, without phase separation. And it has low cost, simple production and reliable process, to be used in biological and medical material, etc.

Description

technical field [0001] The invention relates to a phase-change energy-storage ultrafine composite fiber, in particular to a shape-fixed phase-change energy-storage ultrafine composite fiber with a polymer as a carrier, a preparation method and application thereof. Background technique [0002] Phase change materials have the characteristics of high heat storage density and approximately isothermal heat storage and release process, which can achieve the purpose of energy storage and release and adjust the mismatch between energy supply and demand. It is one of the widely used energy storage materials at present. According to the phase change process, phase change materials are generally divided into solid-solid phase change, solid-liquid phase change, solid-gas phase change and liquid-gas phase change. Because the latter two generate a large amount of gas during the phase change process, the volume change of the phase change material is large, and al...

AI Technical Summary

Problems solved by technology

However, when the polyol is heated above the solid-solid phase transition temperature, it changes from a crystalline state to a plastic crystal, and the plastic crystal has a large vapor pressure and is easy to sublimate, so it still needs to be packaged in a container when used, and it is airtight Pressure vessels, which do not reflect the superiority of solid-solid phase change materials

The patent application number is "200510035527.9", and the invention title is "a nano-cellulose solid-solid phase change material and its preparation method". It grafts polyethylene glycol on microcrystalline cellulose through a heterogeneous system. A solid-solid phase change energy storage material has been prepared, which solves the problem of polyol sublimation, but the disadvantage of this material is that due to the low grafting rate of phase change substances, the overall phase change enthalpy of the material is low and the thermal conductivity is poor.