Synthetic method of phase change material polytetramethylene glycol amine aldehyde condensation crosslinking copolymer

Abstract

The invention discloses a synthetic method of a phase change material polytetramethylene glycol amine aldehyde condensation crosslinking copolymer. The synthetic method comprises the following steps: by adopting a method of combining an alcohol aldehyde condensation reaction and an ammonium aldehyde condensation reaction and taking polytetramethylene glycol as a phase change function material, an amine compound and an aldehyde compound as a crosslinking agent, controlling a certain temperature and power of hydrogen in a water medium for a chemical reaction; carrying out a co-condensation reaction on an alcoholic hydroxyl group, an amino and a carbonyl group to form a novel chemical bond; and removing water to synthesize the crosslinking copolymer. During reaction, polytetramethylene glycol in different use levels is taken as the phase change function material to synthesize the crosslinking copolymer with different enthalpies of phase change and different phase change temperatures. The synthetic method is simple in process, high in yield and free from byproducts. The synthesized crosslinking copolymer inhibits free movement of a polytetramethylene glycol molecular chain and has the characteristics of indissolvableness and insolubility, so that the crosslinking copolymer becomes a solid-solid phase change material in true sense and can be widely applied to energy storage and insulation in the fields of solar energy collection, load shifting of power supply, waste heat recovery, buildings, cloth, electronic equipment and the like.

Description

technical field [0001] The invention belongs to a synthesis method of a polytetramethylene glycol amine aldehyde condensation cross-linked copolymer that can be used as an energy storage heat preservation phase change material, and particularly relates to the co-condensation reaction of aldol condensation reaction and amine aldehyde condensation reaction, and polybutylene glycol The invention discloses a method for synthesizing cross-linked copolymers in which diol is a phase-change functional material. Background technique [0002] The application of phase change materials in energy storage and heat preservation has attracted more and more people's attention and application. Organic polymer phase change materials for energy storage have the advantages of high phase change enthalpy, phase change temperature close to room temperature, abundant sources, non-toxic and pollution-free, no phase separation, and low supercooling, which can meet the actual needs of solar energy util...

AI Technical Summary

Problems solved by technology

Judging from the literature that has been consulted so far, the use of chemical methods to prepare solid-solid phase change materials often has the following disadvantages: (1) The enthalpy of phase change is greatly reduced, or (2) The reaction steps are complicated and difficult to industrialize

The former method has limited amount of adsorbed polyethylene glycol and is easy to leak, less energy storage, and insignificant temperature adjustment; the latter method has a complicated production process, and the newly formed chemical bonds affect the crystallization of polyethylene glycol, reducing its Crystallization enthalpy

[0004] And because polyethylene glycol is very soluble in water, also soluble in common organic solvents such as benzene, toluene, methylene chloride, ethanol, it is difficult to adopt the usual method to its microencapsulation, making the application of polyethylene glycol Development is very limited

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