Preparation method of enhanced type self-temperature adjustment material based on n-decyl alcohol/lauric acid phase change microcapsule

Abstract

The invention relates to a preparation method of a low temperature adjustment agent taking n-decyl alcohol / lauric acid / melamine modified urea formaldehyde resin / polypropylene as a temperature adjustment material. The preparation method comprises the following steps: mixing n-decyl alcohol and lauric acid in a certain proportion; coating the mixture with urea / melamine / formaldehyde resin to obtain amicrocapsule on the premise that a proper emulsifier is selected, wherein the microcapsule has a maximum endothermic peak of 85.15 J / g at -1.96 DEG C; adding the prepared microcapsule into polypropylene in a certain proportion; and performing extrusion with a double screw extruder by reasonably controlling the extrusion temperature so as to obtain a final product. The product has certain self-temperature adjustment performance, has a certain temperature control effect in a range of -20 DEG C to 10 DEG C, and reaches the maximum endothermic peak of 15.41 J / g at -4.21 DEG C. The preparation method provided by the invention has the advantages of efficient and quick preparation, reversible and recyclable temperature adjustment process, waste reduction, simple technology, low cost, greenness,environmental protection, wide application prospect and the like, and the product has certain mechanical performance.

Description

technical field [0001] The invention belongs to the field of chemical industry and new materials, and relates to a preparation method of a low-temperature temperature-regulating material, in particular to a preparation method of an enhanced self-temperature-regulating material based on n-decyl alcohol / lauric acid phase change microcapsules. Background technique [0002] Microcapsule is a packaging structure with a core-shell structure. When the capsule core (also called core material) of the microcapsule is solid, the shape of the microcapsule is consistent with the solid shape. When the core material is liquid or gas, the microcapsule Generally present as a spherical shape. The particle size of microcapsule particles is generally 1-100 μm, in which the thickness of the microcapsule shell (also called wall material) is generally below 10 μm, and the core material accounts for up to about 90% [Han Lulu, Bi Liangwu, Zhao Zhendong, etc. Research progress on preparation methods...

AI Technical Summary

Problems solved by technology

[0004] However, although traditional phase-change microcapsule materials have many advantages such as environmental protection, recyclability, heat absorption and release under constant temperature conditions, adjustable working range, and wide range of energy sources, in terms of specific applications, they face Due to various deficiencies in mechanical strength, weather resistance, corrosion resistance, etc., the application in the field of low temperature is relatively seldom, and it is impossible to accurately control a certain working temperature in a certain continuous range. The present invention starts from a certain These difficulties have been solved to a certain extent, and a certain contribution has been made to the further application and development of organic phase change microcapsules.

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