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Preparation method of spherical carboxymethyl cellulose/melamine resin nano phase change energy storage material

A technology of carboxymethyl cellulose and melamine resin, which is applied in the field of preparation of spherical carboxymethyl cellulose/melamine resin nano phase change energy storage materials, can solve the problem of poor heat transfer performance of microcapsule phase change materials, wall material High brittleness, low phase change enthalpy, etc., to achieve good coating effect, high wall material brittleness, and increase heat transfer rate

Inactive Publication Date: 2012-07-25
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a preparation method of a spherical carboxymethyl cellulose / melamine resin nano phase change energy storage material to solve the problem that the current unit mass phase change enthalpy is not high, the heat transfer performance of the microcapsule phase change material is poor, and the wall The problem of high material brittleness

Method used

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  • Preparation method of spherical carboxymethyl cellulose/melamine resin nano phase change energy storage material
  • Preparation method of spherical carboxymethyl cellulose/melamine resin nano phase change energy storage material
  • Preparation method of spherical carboxymethyl cellulose/melamine resin nano phase change energy storage material

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Embodiment 1

[0015] Put 2.5g of melamine and 4g of 37% formaldehyde solution in a three-neck flask with a stirrer, add triethanolamine solution dropwise until the pH value of the solution is 8-9, and react in a constant temperature water bath at 72°C until the solution becomes clear to obtain melamine Resin prepolymer solution: Dissolve 0.5g carboxymethyl cellulose solution in a certain amount of distilled water to obtain carboxymethyl cellulose solution, add it to the melamine resin prepolymer solution, and stir at a certain speed in an ice-water bath After 5 to 10 minutes, pour it into a constant pressure dropping funnel to obtain a carboxymethyl cellulose / melamine resin prepolymer solution; add 0.4 g of emulsifier and 25 mL of distilled water to 2.5 g of paraffin and pass it through a laboratory high-dispersion homogenizer Disperse for 10-20 minutes to obtain the core material emulsion; put the core material emulsion in a three-neck bottle with a stirrer, put it in a constant temperature...

Embodiment 2

[0017] Put 2.5g of melamine and 4g of 37% formaldehyde solution in a three-neck flask with a stirrer, add triethanolamine solution dropwise until the pH value of the solution is 8-9, react in a constant temperature water bath at 65°C until the solution becomes clear, and obtain melamine Resin prepolymer solution: Dissolve 0.75g carboxymethyl cellulose solution in a certain amount of distilled water to obtain carboxymethyl cellulose solution, add it to the melamine resin prepolymer solution, and stir in an ice-water bath for 5-10 minutes , and pour it into a constant pressure dropping funnel to obtain a carboxymethylcellulose / melamine resin prepolymer solution; add 0.4g emulsifier and 25mL distilled water to 2.5g paraffin and disperse it through a laboratory high-dispersion homogenizer for 10-20min , to obtain the core material emulsion; put the core material emulsion in a three-neck flask with a stirrer, put it in a constant temperature water bath at 80°C, and control the flow ...

Embodiment 3

[0019]Put 2.5g of melamine and 4g of 37% formaldehyde aqueous solution in a three-neck flask with a stirrer, add triethanolamine solution dropwise until the pH value of the solution is 8-9, and react in a constant temperature water bath at 85°C until the solution becomes clear to obtain melamine Resin prepolymer solution: Dissolve 0.25g carboxymethyl cellulose solution in a certain amount of distilled water to obtain carboxymethyl cellulose solution, add it to the melamine resin prepolymer solution, and stir in an ice-water bath for 5-10 minutes , and pour it into a constant pressure dropping funnel to obtain a carboxymethylcellulose / melamine resin prepolymer solution; add 0.4g emulsifier and 25mL distilled water to 2.5g paraffin and disperse it through a laboratory high-dispersion homogenizer for 10-20min , to obtain the core material emulsion; put the core material emulsion in a three-necked flask with a stirrer, put it in a constant temperature water bath at 90°C, control th...

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Abstract

The invention provides a preparation method of a spherical carboxymethyl cellulose / melamine resin nano phase change energy storage material, relating to a method for absorbing or releasing heat energy by virtue of a heat effect produced during solid-liquid (or liquid-solid) phase conversion on a material when ambient temperature deviates from phase change temperature. According to the invention, the carboxymethyl cellulose / melamine resin is taken as a wall material of a nano capsule, and solid paraffin is taken as a core material; and in situ polymerization reaction is carried out by controlling reaction conditions, thus the spherical phase change energy storage nano capsule material is obtained. The phase change energy storage nano capsule material prepared by the invention is a sphere with the diameter of being about 50nm, 60.1% of core material can be contained in 1g of capsule material at most, enthalpy value can reach up to 81.6J / g at most, and capsule damage rate is 12.6% at lowest. The phase change energy storage material prepared by the invention has a wide application prospect in the fields of industrial and civil construction heating, energy conservation of air conditioner and recycling of waste heat.

Description

technical field [0001] The invention relates to a preparation method of a spherical carboxymethyl cellulose / melamine resin nano phase change energy storage material. Background technique [0002] With the continuous development of social economy, the energy crisis has become an unavoidable problem for the whole world, and phase change energy storage is a very important energy-saving new technology. Phase change capsule material is a new type of composite phase change material obtained by enclosing the substance to undergo phase change in spherical capsules during the process of preparing phase change materials using encapsulation technology. The phase change capsule material not only improves the stability and utilization rate of the phase change material, but also strengthens and improves the heat transfer performance and processing performance of the phase change material. Phase change capsule materials can technically solve the application limitations of phase change mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/18C08G12/40C08G12/32
Inventor 黄占华胡晓峰张斌曲明鑫
Owner NORTHEAST FORESTRY UNIVERSITY
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