Phase change energy storage porous material and preparation method thereof

A technology of porous materials and phase change energy storage, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problem of weak binding force between microcapsules and porous material pore walls, uneven dispersion of microcapsules, and phase change of core materials. Material leakage and other problems, to shorten the production cycle, mature the preparation process, and improve the binding force.

Inactive Publication Date: 2019-09-06
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the former method, since the phase-change microcapsules are adsorbed after forming pores, the amount of adsorption is related to the size of the pores, the size and concentration of the microcapsules, and the adsorption is mostly physical adsorption. In the latter method, the microcapsule powder is directly added to the polymer matrix for blending, which has problems such as uneven dispersion of microcapsules and poor stability of the matrix, and the pore-forming conditions are likely to cause microcapsules to form pores after blending. Adverse effects such as leakage of the core material phase change material due to rupture of the capsule wall

Method used

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  • Phase change energy storage porous material and preparation method thereof
  • Phase change energy storage porous material and preparation method thereof
  • Phase change energy storage porous material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] 1) The polyvinyl alcohol is soaked in water at room temperature to swell, heated and dissolved to make a polyvinyl alcohol aqueous solution with a concentration of 4% by mass; the molecular weight of the polyvinyl alcohol is 25000-135000, and the degree of alcoholysis is 86%-99.9%;

[0032] 2) adding the phase-change microcapsule emulsion into the aqueous solution of polyvinyl alcohol to obtain a blend; the mass ratio of the phase-change microcapsules and polyvinyl alcohol in the blend is 1:1, and the diameter of the phase-change microcapsules is 5 -6μm, the core material of the phase change microcapsule is hexadecane, and the wall material of the phase change microcapsule is polyurea / polyurethane composite shell resin formed by the reaction of polyisocyanate, polyol compound and polyamine compound;

[0033] 3) stirring and foaming the phase change material microcapsules and polyvinyl alcohol blend at a speed of 1500 r / min for 10 minutes at a high speed to prepare a foam...

Embodiment 2

[0036] 1) The polyvinyl alcohol is soaked in water at room temperature to swell, heated and dissolved to make a polyvinyl alcohol aqueous solution with a concentration of 6% by mass; the molecular weight of the polyvinyl alcohol is 25000-135000, and the degree of alcoholysis is 86%-99.9%;

[0037] 2) The phase-change microcapsule emulsion is added in the aqueous solution of polyvinyl alcohol to obtain a blend; the mass ratio of the phase-change microcapsules and polyvinyl alcohol in the blend is 2.5:1, and the diameter of the phase-change microcapsules is 6 -8μm, the core material of the phase change microcapsule is octadecane, and the wall material of the phase change microcapsule is polyurea / polyurethane composite shell resin formed by the reaction of polyisocyanate, polyol compound and polyamine compound;

[0038] 3) Stirring and foaming the phase change material microcapsules and polyvinyl alcohol blend solution at a high speed of 1000r / min for 10 minutes to prepare a foam ...

Embodiment 3

[0041] 1) The polyvinyl alcohol is soaked in water at room temperature to swell, heated and dissolved to make a polyvinyl alcohol aqueous solution with a concentration of 6% by mass; the molecular weight of the polyvinyl alcohol is 25000-135000, and the degree of alcoholysis is 86%-99.9%;

[0042] 2) adding the phase-change microcapsule emulsion into the polyvinyl alcohol aqueous solution to obtain a blend; the mass ratio of the phase-change microcapsules and polyvinyl alcohol in the blend is 3:1, and the diameter of the phase-change microcapsules is 8 -10μm, the core material of the phase change microcapsule is methyl myristate, and the wall material of the phase change microcapsule is polyurea / polyurethane composite shell resin formed by the reaction of polyisocyanate, polyol compound and polyamine compound;

[0043] 3) stirring and foaming the phase change material microcapsules and polyvinyl alcohol blend at a speed of 1500 r / min for 10 minutes at a high speed to prepare a ...

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Abstract

The invention discloses a phase change energy storage porous material, and a preparation method thereof, and belongs to the technical field of high molecular material. The preparation method of the phase change energy storage porous material comprises following steps: 1, a polyvinyl alcohol aqueous solution is prepared; 2, a phase change microcapsule emulsion is added into the polyvinyl alcohol aqueous solution so as to obtain a blended solution, wherein in the blended solution, the mass ratio of the phase change microcapsule emulsion to polyvinyl alcohol is controlled to be (1-5) : 1; 3, theblended solution is subjected to stirring foaming so as to obtain a foam solution; and 4, the foam solution is subjected to freeze drying so as to obtain the phase change energy storage porous material. According to the preparation method, solution physical blending foaming method is adopted, so that problems in the prior art that in porous material physical adsorption of phase change microcapsules, adsorption capacity is low, the bonding strength with a base body is poor, and the blending uniformity and stability of phase change microcapsule powder with polymer foaming solution are poor. Thepreparation method is capable of improving the filling capacity of phase change material microcapsules in porous materials, and the bonding strength with the base body, and ensuring the dispersion uniformity of the phase change materials in porous materials.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage materials, and in particular relates to a phase change energy storage porous material and a preparation method thereof. Background technique [0002] In order to meet the needs of wearing comfort, high-quality shoe materials require high thermal regulation performance in terms of heat transfer and perspiration. In addition, the demand for foam materials with light weight and good dimensional stability is increasing. Polyvinyl alcohol (PVA) porous material is biodegradable, heat-resistant, and chemical-resistant. It has a large compressive modulus and tensile modulus in the dry state. It can be used as a shoe material to meet light weight and dimensional stability. good demand. However, pure polyvinyl alcohol porous materials cannot meet the performance requirements of thermal regulation, so it is particularly important to research and develop polyvinyl alcohol porous materials...

Claims

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Application Information

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IPC IPC(8): C09K5/06C08J9/30C08L29/04C08L75/02C08L75/04
CPCC08J9/30C08J2329/04C08J2475/02C08J2475/04C08K5/01C08K5/101C09K5/063
Inventor 师文钊邢建伟刘瑾姝陆少锋马超群李苏松肖超鹏
Owner XI'AN POLYTECHNIC UNIVERSITY
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