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Preparation method of binary aliphatic acid/PMMA shape-stabilized phase change material

A technology for shaping phase change materials and binary fatty acids, which is applied in heat exchange materials, chemical instruments and methods to achieve the effects of high phase change enthalpy, low corrosiveness and high thermal stability

Inactive Publication Date: 2014-09-24
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, single-component fatty acids are difficult to meet the requirements of different phase transition temperatures in practical applications, and binary fatty acid complex systems are often sought

Method used

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  • Preparation method of binary aliphatic acid/PMMA shape-stabilized phase change material
  • Preparation method of binary aliphatic acid/PMMA shape-stabilized phase change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the first step, 50 mL of MMA (methyl methacrylate) was washed with 5% sodium hydroxide solution several times, and then distilled under reduced pressure for later use.

[0023] In the second step, take 2.5g of CA (capric acid) and 2.5g of LA (lauric acid) into the beaker and seal it, put it in an oven at 80°C for two hours, shake it in an ultrasonic water bath at 50°C for 5 minutes, and then put it in an oven at 50°C in spare.

[0024] The third step is to take 5.5mL of refined MMA and add it to a three-necked flask. One end is connected to a condenser, and the other end is connected to nitrogen gas. First pass nitrogen gas for 3 minutes, then add 0.05g AIBN (azobisisobutyronitrile), and stir in a water bath at 80°C for 25 minutes until a sticky grout forms.

[0025] The fourth step is to remove the heat source, quickly cool down to 50°C, pour the molten dibasic fatty acid into the flask, stir vigorously for 5 minutes, and then pour it into a mold and seal it.

[0...

Embodiment 2

[0029] In the first step, 50 mL of MMA was washed with 5% sodium hydroxide solution several times, and then distilled under reduced pressure for subsequent use.

[0030] In the second step, 2g of CA and 3g of LA were added into a beaker and sealed, placed in an oven at 80°C for two hours, shaken in an ultrasonic water bath at 50°C for 5 minutes, and then placed in an oven at 50°C for later use.

[0031] The third step is to take 5.5mL of refined MMA and add it to a three-necked flask, connect a condenser tube at one end, and nitrogen gas at the other end. First pass nitrogen gas for 3 minutes, then add 0.05g AIBN, and stir in a water bath at 80°C for 25 minutes until a viscous slurry is formed.

[0032] The fourth step is to remove the heat source, quickly cool down to 50°C, pour the molten dibasic fatty acid into the flask, stir vigorously for 5 minutes, and then pour it into a mold and seal it.

[0033] The fifth step is to seal the mold and keep it in a 60°C water bath for ...

Embodiment 3

[0036] In the first step, 50 mL of MMA was washed with 5% sodium hydroxide solution several times, and then distilled under reduced pressure for subsequent use.

[0037] In the second step, 1.2g of CA and 1.8g of LA were added into a beaker and sealed, placed in an oven at 80°C for two hours, shaken in an ultrasonic water bath at 50°C for 5 minutes, and then placed in an oven at 50°C for use.

[0038] The third step is to take 7.5mL of refined MMA and add it to a three-necked flask, connect a condenser tube at one end, and nitrogen gas at the other end. First pass nitrogen gas for 3 minutes, then add 0.07g AIBN, and stir in a water bath at 80°C for 25 minutes until a viscous thin slurry is formed.

[0039] The fourth step is to remove the heat source, quickly cool down to 50°C, pour the molten dibasic fatty acid into the flask, stir vigorously for 5 minutes, and then pour it into a mold and seal it.

[0040] The fifth step is to seal the mold and keep it in a 60°C water bath f...

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Abstract

The invention provides a binary aliphatic acid / PMMA shape-stabilized phase change material and a preparation method thereof. The shape-stabilized phase change material is prepared from the following raw materials: 30 wt%-70 wt% of a binary aliphatic acid eutectic mixture, 30 wt%-70 wt% of MMA (methyl methacrylate), and 0.3 wt%-0.7 wt% of AIBN (azodiisobutyronitrile). The preparation method comprises adding MMA and AIBN in a water bath of 80 DEG C, stirring for 25 min, then adding molten binary aliphatic acid, intensely stirring for 5 min; pouring the mixture into a die, sealing the die, putting the die in a water bath of 60 DEG C for 2 hours, and then putting the die in a water bath of 90 DEG C for 1 hour to obtain the binary aliphatic acid / PMMA shape-stabilized phase change material. The shape-stabilized phase change material has an appropriate phase change temperature and large phase change latent heat, is good in heat stability, and has good application prospects.

Description

technical field [0001] The invention belongs to the field of shape-setting phase-change materials, and in particular relates to a method for preparing a shape-setting phase-change material in which polymethyl methacrylate is used as a base material and dibasic fatty acid is used as a phase-change material. Background technique [0002] Since the energy crisis, the theoretical basis and applied research of phase change energy storage have risen rapidly and developed continuously in countries all over the world. The continuous emission of greenhouse gases and the continuous rise of fuel prices make the effective use of various renewable energy sources (such as solar energy) an urgent issue to be solved. In view of the discontinuity and instability of solar energy, it is extremely important to study efficient and economical energy storage technologies. Due to their ability to store energy and control temperature, as well as the advantages of high energy storage density and app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 刘宝春朱明明胡晓东梁振义
Owner NANJING UNIV OF TECH
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