Preparation method of lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material

A technology of melamine and formaldehyde resin, applied in the directions of microcapsule preparation, microsphere preparation, heat exchange materials, etc., can solve the difficulties in the use or manufacture of microcapsules, the inability to separate or evenly disperse each other, and the rough surface of the microcapsule wall, etc. problems, to achieve the effect of improving the development of renewable energy, improving energy efficiency, and good airtightness

Inactive Publication Date: 2014-04-30
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some literatures have reported the preparation of microcapsule phase change materials by in-situ polymerization. Xiong Wei and other researchers published "Phase Change Energy Storage Micro "Preparation and Characterization of Capsules" paper; Liu Si and other researchers published the paper "Preparation and Performance Characterization of Phase Change Microcapsules for Clothing" in Guangdong Chemical Industry, Vol. 40, No. 2, Page 3-4, 2013, Shandong The patent applied by the Institute of New Materials of the Academy of Sciences is a high-temperature-resistant phase-change material microcapsule and its preparation method (publicat

Method used

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  • Preparation method of lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material
  • Preparation method of lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material
  • Preparation method of lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material

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Embodiment 1

[0023] The first step, the preparation of melamine-formaldehyde resin prepolymer;

[0024] Pour 5.8g of melamine into a round-bottomed flask, add 11.35g of formaldehyde solution and 60ml of deionized water, then adjust the pH to 8-9 with triethanolamine, and finally stir at 70°C for 1 hour until the solution is transparent. Melamine-formaldehyde resin prepolymer;

[0025] Second step, the emulsification of core material lauryl alcohol;

[0026] Add 1.6g of Triton X-100, 7.8g of resorcinol, and 300ml of deionized water into another round bottom flask, then add 10g of dodecanol, and stir at 1500rpm at 60°C Emulsified for 0.5h to obtain an emulsion;

[0027] The third step is the formation of microcapsule phase change materials;

[0028] While stirring, add all the melamine-formaldehyde resin prepolymer obtained in the first step to the emulsion formed in the second step dropwise at a speed of 1ml / min, then adjust the pH to 3-4 with formic acid, and stir for another 4 hours ,...

Embodiment 2

[0030] The first step, the preparation of melamine-formaldehyde resin prepolymer;

[0031] Pour 5.1g of melamine into a round-bottomed flask, then add 13.24g of formaldehyde solution and 60ml of deionized water, then adjust the pH to 8-9 with triethanolamine, and finally stir at 75°C for 1.5h until the solution is transparent. Obtain melamine-formaldehyde resin prepolymer;

[0032] Second step, the emulsification of core material lauryl alcohol;

[0033] Add 1.8g of Triton X-100, 9.9g of resorcinol, and 300ml of deionized water into another round bottom flask, then add 15g of dodecanol, and stir at 2000rpm at 65°C Emulsified for 1h to obtain an emulsion;

[0034] The third step is the formation of microcapsule phase change materials;

[0035] While stirring, add all the melamine-formaldehyde resin prepolymer obtained in the first step to the emulsion formed in the second step dropwise at a speed of 2ml / min, then adjust the pH to 3-4 with formic acid, and stir for another 3 ...

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Abstract

The invention discloses a preparation method of a lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material, and relates to preparation of a microcapsule phase-change material with an in-situ polymerization method. The method comprises the following steps: adding formaldehyde and a solvent to melamine, adjusting the pH to 8-9 by triethanolamine, and stirring until the solution is transparent, thereby obtaining a melamine-formaldehyde resin prepolymer; mixing an emulsifier, a cross-linking agent, a solvent and lauryl alcohol, and stirring for emulsifying, thereby obtaining a core material lauryl alcohol solution; adding the melamine-formaldehyde resin prepolymer to the core material lauryl alcohol solution, then adjusting the pH to 3-4 by formic acid, and stirring, thereby obtaining a lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material suspension; washing, suction-filtering, and baking to obtain the dried lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material powder. The prepared microcapsule has the small particle size of 1-2 microns, is even in particle size distribution, smooth in surface, round in shape and good in leakproofness, and has broad application prospect.

Description

technical field [0001] The invention relates to an in-situ polymerization method for preparing microcapsule phase change materials, in particular to a preparation method for dodecanol / melamine-formaldehyde resin microcapsule phase change materials. Background technique [0002] Energy is the basis for human survival. At present, with the rapid development of the global industry, the global energy is increasingly scarce, and the energy depletion crisis and environmental pollution have attracted more and more attention. Improving the efficiency of energy use and developing renewable energy are important issues facing human beings. At this time, energy storage is particularly important. For energy storage, thermal energy storage is the most used. Energy storage technology can be used to solve the contradiction between thermal energy supply and demand mismatch. It is an important technology to improve energy utilization efficiency and protect the environment. The field has br...

Claims

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Application Information

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IPC IPC(8): B01J13/18C09K5/06
Inventor 肖宗源梁怀阳冯艳玲邵文尧
Owner XIAMEN UNIV
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