Method for preparing comb-shaped macromolecular solid-solid phase change material

Abstract

The invention discloses a method for preparing a comb-shaped macromolecular solid-solid phase change material. The method comprises the following processes of: adding at least one of macromolecular compounds containing hydroxy, amino or carboxyl into a dispersion liquid to form a uniformly dispersed suspension, heating the suspension to the temperature between 50 DEG C and 95 DEG C to react at the stirring speed of 50-400r / min, adding a catalyst or an initiator in an amount which is 0.1-2 percent of the mass of the macromolecular compound, then adding (methyl) acrylic n-alkyl ester in an amount which is 30-300 percent of the mass of the macromolecular compound, reacting for 6-24 h at the same stirring speed, washing the obtained reaction product for three times with deionized water and anorganic solvent respectively, and drying the reaction product to obtain the comb-shaped macromolecular solid-solid phase change material. The dispersion liquid is water, formic acid, acetic acid, methanol or ethanol; and the organic solvent is capable of dissolving the (methyl) acrylic n-alkyl ester and poly (methyl) acrylic n-alkyl ester.

Description

technical field

[0001] The invention relates to phase change material technology, in particular to a method for preparing a comb-shaped polymer solid-solid phase change material with thermal energy storage and release functions. Background technique

[0002] During the phase change process, phase change materials can absorb or release a large amount of latent heat of phase change, and are widely used in aerospace, HVAC, energy-saving buildings, solar energy utilization, electrical cooling, waste heat recovery, clothing and other fields. " aspect is also important. Solid-solid phase change material is a kind of phase change material, which is always in solid state during the phase change process, with small volume change and no liquid leakage, so it has important applications in many fields.

[0003] Chinese invention patent (CN1616588A) discloses a polymer phase change material with two active end groups-polyethylene glycol and polyethylene glycol with one active end group ...