Decanoic acid microcapsules and preparation method thereof

Abstract

The invention discloses decanoic acid microcapsules and a preparation method thereof. The method comprises the following steps: 1, mixing urea with a formaldehyde solution, adjusting the pH value of asystem to 8-9, and adding melamine in batches when the solution is clear so as to obtain a prepolymer solution; 2, adding decanoic acid and an emulsifying agent into deionized water to obtain a decanoic acid emulsion; 3, pouring the prepolymer solution obtained in the first step into the decanoic acid emulsion obtained in the second step, adjusting the pH value of the reaction system to 2-3, andcarrying out a thermostatic reaction for 0.5-1h at 50-80 DEG C, wherein the stirring speed is 600-1000 rpm; 4, heating up to 70-80 DEG C, adding 0.44-0.5 part by mass of a curing agent into the mixture obtained in the third step, and carrying out a thermostatic reaction for 1-2h, wherein the stirring speed is 600-1000 rpm; 5, filtering, washing, drying and screening the product obtained in the fourth step to obtain the decanoic acid microcapsules. The decanoic acid microcapsules obtained by method is low in cost, simple in operation, high in repeatability and lower in requirements for equipment and raw materials, thus being suitable for industrial production.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a melamine-modified capric acid microcapsule and a preparation method thereof. Background technique [0002] As a cheap and easy-to-obtain energy storage material with stable properties, phase change materials can be used in combination with building materials to make them have a high heat storage capacity at a specific temperature or temperature range, and have great applications in construction In the future, once this material is widely used in human life, it will become a green carrier of energy saving and environmental protection, and it has been listed as a national research and development utilization sequence in our country. Microcapsule technology can effectively solve the phenomenon of supercooling and phase separation during the use of phase change materials, and microcapsule technology can effectively solve these two problems. [0003] The research on fatty acid...

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Problems solved by technology

[0004] The research on microcapsules in the direction of architecture mainly focuses on paraffin microcapsules. The preparation methods are mainly in-situ polymerization and interfacial polymerization. At present, there are few studies on fatty acid microcapsules and the effect is not good. Capric acid and myristic acid are used as core materials. The core rate of the microcapsules prepared by the solvent evaporation method is only 18.95%, and the phase change enthalpy is only 19.94J / g; while the microcapsules using n-octadecane or n-hexadecane as the core material also have a core The materials are expensive, and it is difficult to apply them on a large scale.

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