Method used for preparing solid-solid phase change material by polyethylene glycol/terylene physical blending

Abstract

The invention discloses a method used for preparing a solid-solid phase change material by polyethylene glycol / terylene physical blending, and belongs to the field of functional polymer synthetic technology. According to the method, 60 to 95 weight parts of polyethylene glycol and 40 to 5 weight parts of terylene are taken as raw materials, and are mixed according to charging sequence at a certain temperature with stirring so as to realize physical blending; and then the mixture is subjected to shock cooling, pumping filtration, and vacuum drying so as to connect polyethylene glycol and terylene via hydrogen bonds and intermolecular forces, and obtain the polyethylene glycol / terylene physically blended solid-solid phase change material. The method comprises following steps: drying and dissolving of the raw materials; dropwise adding of polyethylene glycol into terylene solution at a certain temperature; physical blending for a certain time at a certain temperature with stirring; immersion cooling and washing; pumping filtration; vacuum drying; obtaining of milk white particles of the solid-solid phase change material; and performance test.

Description

technical field [0001] The invention relates to a method for physically blending and preparing polyethylene glycol and polyester solid-solid phase transition material by utilizing new process conditions. Background technique [0002] The main advantage of polymer solid-solid phase change materials is that there is no liquid state before and after the phase change; when the solid-solid phase change material phase changes, the heat capacity is tens of times higher than that of water; characteristics and can be used for temperature regulation. Since there is no liquid state during the phase change process, no container is required. Compared with substances such as water with phase change, it is convenient to use, has a small volume change, is easy to combine with other materials, and can even be used as a matrix material for the system. In foreign countries, such materials have been used in civil and military fields such as intelligent automatic air-conditioning buildings, gla...

AI Technical Summary

Problems solved by technology

[0003] At present, similar synthesized solid-solid phase transition materials include polyethylene glycol / cellulose acetate and polyethylene glycol / chitosan, but polyethylene glycol / chitosan solid-solid phase transition materials are not suitable as battery heat sinks. , The production cost of polyethylene glycol / cellulose acetate solid-solid phase transition material is high, the catalyst and crosslinking agent used are expensive, the reaction speed is too fast and difficult to control, and it is easy to form body-shaped molecules, which pollutes the environment greatly. hard to buy and save on