Preparation method of expanded vermiculite-paraffin-PAM shape-stabilized phase change energy storage material

Abstract

The invention discloses a preparation method of an expanded vermiculite paraffin PAM shape-stabilized phase change energy storage material. The preparation method comprises the following steps: preparing paraffin/PAM emulsion; and adding the expanded vermiculite into the paraffin/PAM emulsion to obtain the expanded vermiculite paraffin PAM shape-stabilized phase change energy storage material. Theexpanded vermiculite has strong hydrophilicity and low density, can be used as an additive to be added into the body of the paraffin/PAM shape-stabilized phase change material, reduces the flow of paraffin in the material, reduces the leakage amount of paraffin, and improves the utilization efficiency of paraffin. By adding the expanded vermiculite, the leakage of system paraffin is effectively reduced, and the paraffin encapsulation efficiency of the paraffin/PAM shape-stabilized phase change material is improved; in addition, the leakage of the paraffin is effectively reduced, and the encapsulation efficiency of the paraffin and the cycling stability of the material are improved.

Description

technical field [0001] The invention relates to the technical field of organic-inorganic composite phase-change energy storage materials. Specifically, it relates to a preparation method of expanded vermiculite-paraffin-PAM shape-changing energy storage material. Background technique [0002] As an energy-saving material, phase change materials can store and release energy during the phase change process, effectively reduce building energy consumption, and improve indoor comfort, so they have attracted more attention. As a common organic solid-liquid phase change material, paraffin has the advantages of high latent heat of phase change, wide phase change temperature, stable properties and low price, and has been widely used in many fields. Since paraffin wax has a liquid phase during the phase change process, it is usually necessary to encapsulate it with an encapsulation material to make a fixed phase change material to prevent its leakage. At present, the encapsulation m...

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Problems solved by technology

These methods usually have disadvantages such as complex preparation process, long reaction time, low material strength, high cost or low paraffin encapsulation efficiency.

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