Method for quickly preparing phase change energy storage microcapsule by ultraviolet light irradiation and polymerization

A technology of phase change energy storage and phase change energy storage material, which is applied in the field of ultraviolet light-induced polymerization to rapidly prepare phase change energy storage microcapsules, can solve the problems of complex preparation process, slow reaction rate, long preparation time, etc., and achieve uniform product. , the effect of fast polymerization rate and increased reaction rate

Inactive Publication Date: 2010-01-20
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common defect of these two methods is that the preparation process is complex, the reaction rate is sl

Method used

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  • Method for quickly preparing phase change energy storage microcapsule by ultraviolet light irradiation and polymerization
  • Method for quickly preparing phase change energy storage microcapsule by ultraviolet light irradiation and polymerization
  • Method for quickly preparing phase change energy storage microcapsule by ultraviolet light irradiation and polymerization

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] Add 15g octadecane, 0.25g photoinitiator 2959, 8g methyl methacrylate, 0.4g Span80, 0.5g Tween80 to 100g deionized water, magnetically stir at 700rpm for 25min at a temperature of 40℃, and then homogenize The machine is homogenized for 3 minutes at 7000 rpm to obtain a stable emulsion.

[0021] Add the emulsion to a 250ml quartz beaker, switch to magnetic stirring at 300rpm, and irradiate the emulsion with a 1000W UV lamp at a distance of 30cm for 30min; then turn off the UV lamp and filter; add the filter cake to 60℃ thermal deionization In the water, keep warm, stir, wash for 30 minutes, and filter again; the filter cake is washed three times under the above conditions, and the product is placed in an oven and dried at 45°C for 5 hours to obtain the product, which is an odorless, loose white powder.

[0022] See the appearance photos of the PCM microcapsules prepared in Example 1 figure 1 . It can be seen from the photos that the microcapsules are loose ...

Example Embodiment

[0025] Example 2

[0026] Add 15g No. 30 phase change paraffin, 0.3g photoinitiator BTC, 10g butyl methacrylate, 0.23g flat addition, 0.96g sodium dodecylbenzene sulfonate to 100g deionized water. Magnetic stirring at 600 rpm for 30 min, and then homogenizing with a homogenizer at 9000 rpm for 3 min to obtain a stable emulsion.

[0027] Add the emulsion to a 250ml quartz beaker, change to 400rpm magnetic stirring, 20cm away from the light source, irradiate the emulsion with a 500W UV lamp for 35min; then turn off the UV lamp and filter; add the filter cake to 60℃ hot deionized water , Keep warm, stir, wash for 30 minutes, and filter again; the filter cake is washed three times under the above conditions, and the product is placed in an oven and dried at 45°C for 5 hours to obtain the product, which is an odorless, loose white powder.

Example Embodiment

[0028] Example 3

[0029] Add 15g lauryl alcohol, 0.25g photoinitiator ABP, 8g methacrylic acid, 0.46g emulsifier OP10, 0.790g sodium lauryl sulfate to 100g deionized water, and magnetically stir at 700rpm for 30min at a temperature of 30℃ , And then homogenize with a homogenizer at 7000rpm for 3min to obtain a stable emulsion.

[0030] Add the emulsion to a 250ml quartz beaker, change to 300rpm magnetic stirring, 20cm away from the light source, irradiate the emulsion with a 500W UV lamp for 40min; then turn off the UV lamp and filter; add the filter cake to 60℃ In ionized water, keep warm, stir, wash for 30 minutes, and filter again; the filter cake is washed three times under the above conditions, and the product is placed in an oven and dried at 45°C for 5 hours to obtain the product, which is an odorless, loose white powder.

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Abstract

The invention relates to a method for quickly preparing a phase change energy storage microcapsule by ultraviolet light irradiation and polymerization, which comprises the following steps: adding 100 parts of phase change energy storage material, 5-10 parts of surface active agent, 40-80 parts of monomer material and an ultraviolet light initiating agent being 2-5 percent of the monomer material into 500-1,000 parts of deionized water; stirring the materials at a certain rotating speed for 20-40 minutes and then homogenizing and dispersing the materials for 2-5min at the rotating speed of 6,000-12,000 by a homogenizer so as to prepare the materials into an emulsion; putting the emulsion under an ultraviolet light source of 500-1,000W, irradiating the emulsion for 20-40min to initiate the monomer material to polymerize and stirring the emulsion at lower rotating speed; and after finishing initiating, filtering the emulsion to obtain solid powder and washing and drying the solid powder. Because the wavelength of the ultraviolet light is concentrated, the initiation mode of the ultraviolet light to a reactant system is easy to control, and a large quantity of the ultraviolet light initiating agent can be decomposed to generate free radicals, therefore, the reaction speed of photopolymerization is many times higher than the reaction speed of a conventional thermal initiation polymerization mode, and the improvement of the reaction speed renders possible the continuous mass production.

Description

technical field [0001] The invention relates to the preparation technology of phase-change energy storage microcapsules, in particular to a method for rapidly preparing phase-change energy storage microcapsules by polymerization induced by ultraviolet light. The core material of the microcapsules is a phase-change energy storage material, and the wall material adopts ultraviolet light It is made by initiating the polymerization reaction of organic polymer monomers. Background technique [0002] A phase change energy storage material (PCM) is a substance with a specific function, which can change the phase state of a substance at a specific temperature or temperature range (phase change temperature), and absorb or release a large amount of phase along with the phase change process. It becomes latent heat, so it can be used to store heat or cold. Compared with sensible heat energy storage, phase change energy storage has the characteristics of high energy storage density, app...

Claims

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Application Information

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IPC IPC(8): B01J13/14B01J19/12
Inventor 马素德唐国翌姚有为宋国林
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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