Phase change material microcapsule coated by thermoset phenolic resin and preparation method thereof

A technology of phase change material and phenolic resin, which is applied in the direction of microcapsule preparation, heat exchange material, microsphere preparation, etc. It can solve the problems of poor durability, low phase change heat, and low mixing amount, and achieve good coating effect , the effect of high phase change heat

Inactive Publication Date: 2012-08-01
李雨杉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phase change material has the characteristics of excellent high temperature resistance and flame retardancy, and solves the problems of low doping amount of phase change material, low phase change heat, easy leakage and poor durability existing in the existing microcapsule phase change material

Method used

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  • Phase change material microcapsule coated by thermoset phenolic resin and preparation method thereof
  • Phase change material microcapsule coated by thermoset phenolic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step 1, weighing 100g of n-octadecane, heating at 40°C until completely melted;

[0041] Step 2, adding 4 g of alkylphenol polyoxyethanol ether, 150 g of distilled water, and 8 g of 48% aqueous sodium hydroxide solution to the molten n-octadecane and mixing to form an emulsion;

[0042] Step 3, put the emulsion into an ultrasonic cleaner and vibrate ultrasonically until the particle size of the emulsion reaches 1-1000 microns;

[0043] Step 4, move the emulsion that step 3 obtains into a four-mouth container that includes agitator, thermocouple, condenser tube and feeding port;

[0044] Step 5, place the four-mouth container containing the emulsion in step 4 in the intelligent temperature-controlled electric heating mantle, start stirring and heating;

[0045] Step 6, weighing 100 g of a thermosetting phenolic resin prepolymer with an average degree of polymerization of 2 and a terminal methylol content of 20 wt %;

[0046] Step 7, mechanically stirring the emulsion i...

Embodiment 2

[0055] Step 1, weigh 120g of 44# paraffin and heat at 60°C until completely melted;

[0056] Step 2, add sodium dodecylbenzene sulfonate 5g, distilled water 200g, triethylamine 8g to the 30# paraffin of melting and mix to form an emulsion;

[0057] Step 3, put the emulsion into an ultrasonic cleaner and vibrate ultrasonically until the particle size of the emulsion reaches 1-1000 microns;

[0058] Step 4, move the emulsion that step 3 obtains into a four-mouth container that includes agitator, thermocouple, condenser tube and feeding port;

[0059] Step 5, place the four-mouth container containing the emulsion in step 4 in the intelligent temperature-controlled electric heating mantle, start stirring and heating;

[0060] Step 6, weighing 110 g of a thermosetting phenolic resin prepolymer with an average degree of polymerization of 2 and a terminal methylol content of 20 wt %;

[0061] Step 7, mechanically stirring the emulsion in step 5 and heating it to 70° C., slowly addi...

Embodiment 3

[0070] Step 1, weigh 100 g of mixed fatty acids (66wt% lauric acid+34wt% myristic acid), and heat at 60°C until completely melted;

[0071] Step 2, add emulsifier styrene-maleic anhydride sodium salt emulsion 4g, distilled water 150g, monoethanolamine 8g to the beaker that step 1 is equipped with mixed fatty acid and mix to form emulsion;

[0072] Step 3, the emulsion is put into a homogenizer and mixed at 4000 Rpm until the emulsion droplet size reaches 1-1000 microns;

[0073] Step 4, move the emulsion that step 3 obtains into a four-mouth container that includes agitator, thermocouple, condenser tube and feeding port;

[0074] Step 5, place the four-mouth container containing the emulsion in step 4 in the intelligent temperature-controlled electric heating mantle, start stirring and heating;

[0075] Step 6, weighing 125 g of a thermosetting phenolic resin prepolymer with an average degree of polymerization of 3 and a terminal methylol content of 10 wt %;

[0076] Step 7,...

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Abstract

The invention discloses a phase change material microcapsule coated by thermoset phenolic resin and a preparation method thereof. The capsule uses a phase change material as a capsule core and the thermoset phenolic resin as the capsule wall. The mass ratio of materials of the microcapsule is that 20-75% of the phase change material, 0.5-3% of an emulsifying agent, 2-10% of a catalyst, 20-60% of thermoset phenolic resin prepolymer and 0.2-10% of a reaction terminating agent. The preparation method comprises heating and melting the phase change material, mixing the phase change material with the emulsifying agent, distilled water and the catalyst to form emulsion, heating the emulsion to 40 DEG C to 80 DEG C, dropwise adding the thermoset phenolic resin prepolymer, keeping constant temperature for 20-100minutes after finishing dropwise adding, adding the reaction terminating agent, adjusting the potential of hydrogen (pH) to about 7.0 with organic acid or inorganic acid, vacuumizing to evaporate moisture, and obtaining the phase change material microcapsule coated with the thermoset phenolic resin. The particle diameter of the phase change material microcapsule ranges from 0.5mum to 4mum. The phase change material microcapsule can be used for manufacturing building materials, thermal storage thermoregulation textiles, crop growth protection agents and the like.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage materials, in particular to a thermosetting phenolic resin-coated phase change material microcapsule and a preparation method thereof. The phase change material microcapsule has the function of storing heat energy and can be widely used in manufacturing Energy-saving building materials, thermal storage and temperature-regulating textiles, crop growth protection agents, etc. Background technique [0002] Phase change material for energy storage is an energy-saving and environmentally friendly material developed and applied in the 1970s, and it is also a clean and recyclable energy storage material. During its phase transformation process (melting or solidification), phase change materials absorb or release a large amount of latent heat of phase change while keeping the temperature constant. For solid-liquid phase change materials, when the ambient temperature rises, the heat in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/18
Inventor 李雨杉
Owner 李雨杉
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