Polymer solid-solid phase transition energy storage material and preparation method thereof

Abstract

The invention discloses a polymer solid-solid phase transition energy storage material. The material consists of the following materials by mass percentage: 60 to 95 percent of phase transition main material and 5 to 40 percent of frame material, wherein the phase transition main material is made of high density polyethylene or polyethyleneglycol; and the frame material is made of active carbon fibers. After the phase transition main material and the frame material are dryly mixed, the mixture is placed in an extruder for granulating to obtain granules, and the temperature in a granulating process is controlled at 100 to 190 DEG C; and the produced granules are placed in the extruder to be granulated for 4 to 6 times to produce the polymer solid-solid phase transition energy storage material. The phase transition energy storage material has high enthalpy value of phase transition, good energy storage performance, good thermal stability, high chemical stability and stable shape in the phase transition process, and has application prospect in multiple technical fields, such as solar energy storage, energy utilization and conversion, waste cold and waste heat utilization and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a polymer solid-solid phase change energy storage material, and also relates to a preparation method of the phase change energy storage material. Background technique [0002] The most important issues in the field of energy utilization are energy saving and environmental protection, and phase change energy storage technology is a new type of environmental protection and energy saving technology that uses the phase change latent heat of phase change materials for energy storage (cold storage, heat storage), which can solve the gap between energy supply and demand. The mismatch between time and space is an effective means to improve energy utilization. In recent years, while popularizing and applying relatively mature energy storage technologies, developed countries have invested heavily in the development of new energy storage technologies and energy storage materials ...

AI Technical Summary

Problems solved by technology

However, in the phase change energy storage material prepared by the simple blending method, the phase change main material and the skeleton material are not firmly combined, and separation will occur during the phase change process.