Preparation method of spherical beta-cyclodextrin/ melamine resin phase change energy storage materials

A technology of phase change energy storage materials and melamine resin, which is applied in the direction of microsphere preparation, heat exchange materials, chemical instruments and methods, etc., can solve the problem of high brittleness of wall materials, poor heat transfer performance of microcapsule phase change materials, phase The problem of low enthalpy change can achieve the effect of large phase change enthalpy, good coating effect and high calorific value

Inactive Publication Date: 2012-07-04
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
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Problems solved by technology

[0006] The invention provides a preparation method of a spherical β-cyclodextrin / melamine resin phase-change energy storage material to solve the problems of low phase-change enthalpy per unit mass, poor heat transfer performance of microcapsule phase-change materials, and wall material problems. brittle problem

Method used

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  • Preparation method of spherical beta-cyclodextrin/ melamine resin phase change energy storage materials
  • Preparation method of spherical beta-cyclodextrin/ melamine resin phase change energy storage materials

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Embodiment 1

[0014] The preparation method of the spherical β-cyclodextrin / melamine resin phase-change energy storage material in this example adopts the in-situ polymerization method, which is specifically carried out according to the following steps: 1. A certain amount of formaldehyde The solution is placed in a three-necked flask with a stirrer, and triethanolamine solution is added dropwise until the pH value of the solution is 7.5-9, then melamine is added, and the solution is kept in a constant temperature water bath until the solution becomes clear to obtain a melamine resin solution; β-cyclodextrin is dissolved in In a certain amount of triethanolamine solution, obtain the alkali solution of β-cyclodextrin, control the amount of triethanolamine to make the pH value of the solution 7.5-9, heat it to 40-70°C, add it into the melamine resin solution and stir for 5 After ~10 minutes, pour it into a constant pressure dropping funnel to obtain a β-cyclodextrin / melamine resin prepolymer s...

Embodiment 2

[0017] Put 6.07g of formaldehyde solution in a three-neck flask with a stirrer and add triethanolamine solution dropwise until the pH value of the solution is 7.5-9, then add 3.05g of melamine, and keep a constant temperature water bath at 60°C until the solution becomes clear. Dissolve 0.6g of β-cyclodextrin in a certain amount of triethanolamine solution to obtain an alkaline solution of β-cyclodextrin, control the amount of triethanolamine so that the pH value is 7.5-9, heat it to the temperature of the water bath, and add it to the three bottle and stir for 5-10 minutes. Pour the solution in the three-neck bottle into the constant pressure dropping funnel to obtain the β-cyclodextrin / melamine resin prepolymer solution; add 0.75g OP-10 emulsifier and 50mL distilled water to 4.99g liquid paraffin and pass it through the laboratory The emulsifying machine is highly dispersed for 10-15 minutes to obtain the core material emulsion; put the core material emulsion in a three-neck...

Embodiment 3

[0019] Put 6.01g of formaldehyde solution in a three-necked flask with a stirrer and add triethanolamine solution dropwise until the pH of the solution is 7.5-9, then add 2.98g of melamine, and keep the water bath at 65°C until the solution becomes clear. Dissolve 0.6g of β-cyclodextrin in a certain amount of triethanolamine solution to obtain an alkaline solution of β-cyclodextrin, control the amount of triethanolamine so that the pH value is 7.5-9, heat it to the temperature of the water bath, and add it to the three bottle and stir for 5-10 minutes. Pour the solution in the three-neck bottle into the constant pressure dropping funnel to obtain the β-cyclodextrin / melamine resin prepolymer solution; add 0.91g OP-10 emulsifier and 50mL distilled water to 6.03g liquid paraffin and pass it through the laboratory The emulsifying machine is highly dispersed for 10-15 minutes to obtain the core material emulsion; put the core material emulsion in a three-necked bottle with a stirre...

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Abstract

The invention provides a preparation method of spherical beta-cyclodextrin / melamine resin phase change energy storage materials and relates to a method using a heat effect generated by phase change materials during solid-liquid (or liquid-solid) phase change in the phase change temperature range to reach the goals of absorbing, storing or releasing heat energy. According to the method, beta-cyclodextrin / melamine resin is used as wall materials, liquid paraffin wax is used as core materials, firstly, emulsified core materials are added into a reaction vessel, water bath heating and stirring are carried out, then, uniformly stirred beta-cyclodextrin / melamine prepolymer solution is added into the reaction vessel drip by drip, the in-situ polymerization reaction is carried out through controlling the reaction conditions, and the spherical phase change energy storage materials are obtained through heat insulation, cooling, filtering and vacuum drying. The phase change materials prepared by the method provided by the invention are in the spherical shape, the covering rate on the core materials can reach 79.67 percent to the maximum degree, and the enthalpy can reach 117.57J / g to the maximum degree. The phase change materials prepared by the method can be applied to the field of temperature regulation buffer material preparation and have good application prospects in phase change self regulation temperature aspects.

Description

technical field [0001] The invention relates to a preparation method of a spherical β-cyclodextrin / melamine resin phase change energy storage material. Background technique [0002] With the rapid development of global industry, the energy situation is becoming increasingly severe. Utilizing the latent heat of phase change in the process of phase change to realize energy storage and utilization will help to improve energy efficiency and develop new energy sources. In order to maximize the use of energy, people have been working hard to find technologies for energy storage and utilization. [0003] There is a lot of progress in the research on the practical application of phase change materials at home and abroad. For example, in terms of clothing, phase change materials are mixed with polyaniline-vinyl cellulose for spinning to make temperature-controllable clothing. In terms of construction, there will be CaCl 2 ·6H 2 O is microencapsulated and mixed into construction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/18C09K5/06C08G12/32C08G12/40
Inventor 黄占华曲明鑫倪璐颖申秀娟
Owner NORTHEAST FORESTRY UNIVERSITY
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