High-effect composite polyurethane phase change material and preparation method thereof

Abstract

The invention discloses a preparation method of a high-effect composite polyurethane phase change material. The preparation method comprises the following steps: (1) taking 88-99.99% of polyhydric alcohols, adding 0.01-5% of a catalyst and 0-7% of a chain extender, stirring and performing reaction at a constant temperature to obtain a prepolymer A; (2) adding 5-25% of diisocyanate or polyisocyanates into the prepolymer A, and stirring and performing reaction at a constant temperature to obtain a prepolymer B; (3) adding 0.1-10% of a high-effect conductive filler additive into the prepolymer B,and stirring and performing reaction at a constant temperature to obtain a prepolymer C; (4) adding 0-30% of an adhesive into the prepolymer C, and continuously stirring at a constant temperature until the material is completely dissolved. The polymer material prepared in the invention is combined with fibers and the like; when external humidity is increased, the polymer can rapidly absorb heat,and temperature rise of the fibers is delayed; when the external humidity is decreased, the polymer rapidly releases heat, and cooling of the fibers is delayed. The material is diversified in varietyin actual application and has excellent performance and wide application.

Description

Technical field: [0001] The invention relates to the field of phase change materials, in particular to a high-efficiency composite polyurethane phase change material and a preparation method thereof. Background technique: [0002] With energy saving and environmental protection being paid more and more attention by various countries. Due to the increasing gap between energy supply and demand, there is inconsistency in many energy utilization systems (such as solar energy, wind energy, carbon energy, etc.), resulting in irrational energy utilization and a lot of waste. People's understanding and research on heat storage materials, especially phase change heat storage materials, is something that happened in recent decades. As the basis of energy storage technology, phase change energy storage materials have been greatly developed at home and abroad. At present, most mature phase change materials are mainly solid-liquid phase change materials. However, there will be liquid ...

AI Technical Summary

Problems solved by technology

[0005] However, the above invention still has the disadvantages of long energy conduction time, low tensile strength, and poor energy conduction effect, and needs further improvement.