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Magnetic microencapsulated phase change energy storage material and preparation method thereof

A phase change energy storage material and energy storage material technology, applied in the field of microcapsule organic phase change energy storage material and its preparation, can solve the problems of low strength, achieve low interfacial energy, good phase change performance, and uniform particle size distribution Effect

Active Publication Date: 2014-08-20
上海弈峋科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the microcapsule phase change energy storage material is coated with high thermal conductivity inorganic hybrid wall material, it not only overcomes the poor thermal conductivity, low strength, flammability, and phase change of the traditional organic wall material coated microcapsule phase change energy storage material. The time-changing defect of easy supercooling, and at the same time endow it with magnetic functions, so that the application field of the microcapsule phase change energy storage material has expanded from the traditional textile and building energy-saving fields to microelectronic materials, smart fibers and fabrics, military stealth materials, etc. field

Method used

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  • Magnetic microencapsulated phase change energy storage material and preparation method thereof
  • Magnetic microencapsulated phase change energy storage material and preparation method thereof
  • Magnetic microencapsulated phase change energy storage material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] First, dissolve 0.05mol / L ferric chloride hexahydrate and 0.025mol / L ferrous chloride tetrahydrate in 100mL deionized water, and stir mechanically for 10min at 55°C under the protection of nitrogen to obtain a uniform solution; adjust the pH with ammonia water When the value reaches 10-11, add 0.08g cetyltrimethylammonium bromide to modify ferric oxide nanoparticles, and continue to stir for 20min at 55°C under nitrogen protection; rinse with deionized water and formamide in turn The ferroferric oxide nanoparticles are separated by strong magnetism to remove residual ammonia water and deionized water respectively to obtain ferric oxide nanoparticles. Next, stir 4g of n-eicosane and 4g of tetraethylorthosilicate at 45°C, and heat 0.3g of ferric oxide nanoparticles and 40g of formamide to 45°C; Sonicate for 1 h, add 0.9109 g of cetyltrimethylammonium bromide, and stir at 300 rpm for 1 h to obtain a stable oil-in-water Pickering emulsion. Finally, drop 60mL of 1.78mol / L h...

Embodiment 2

[0032] First, dissolve 0.05mol / L ferric chloride hexahydrate and 0.025mol / L nickel nitrate in 100mL deionized water, and stir mechanically for 10min at 55°C under nitrogen protection to obtain a uniform solution; adjust the pH value to 10~ with ammonia water 11. Add 0.08g of cetyltrimethylammonium bromide to modify the nickel ferrite nanoparticles, and continue to stir for 20min at 55°C under nitrogen protection; rinse the nickel ferrite with deionized water and formamide in turn The nanoparticles are separated by a strong magnetic field to remove residual ammonia water and deionized water respectively to obtain nickel ferrite nanoparticles. Next, stir 4g of n-eicosane and 4g of tetraethylorthosilicate at 45°C, and heat 0.3g of nickel ferrite nanoparticles and 40g of formamide to 45°C; Sonicate for 1 h, add 0.9109 g of cetyltrimethylammonium bromide, and stir at 300 rpm for 1 h to obtain a stable oil-in-water Pickering emulsion. Finally, drop 60mL of 1.78mol / L hydrochloric ac...

Embodiment 3

[0034] First, dissolve 0.05mol / L ferric chloride hexahydrate and 0.025mol / L ferrous chloride tetrahydrate in 100mL deionized water, and stir mechanically for 10min at 55°C under the protection of nitrogen to obtain a uniform solution; adjust the pH with ammonia water When the value reaches 10-11, add 0.08g cetyltrimethylammonium bromide to modify ferric oxide nanoparticles, and continue to stir for 20min at 55°C under nitrogen protection; rinse with deionized water and formamide in turn The ferroferric oxide nanoparticles are separated by strong magnetism to remove residual ammonia water and deionized water respectively to obtain ferric oxide nanoparticles. Next, stir 4g of n-eicosane and 4g of tetraethylorthosilicate at 45°C, and heat 0.3g of ferric oxide nanoparticles and 40g of formamide to 45°C; Sonicate for 1 h, add 0.9109 g of cetyltrimethylammonium bromide, and stir at 300 rpm for 1 h to obtain a stable oil-in-water Pickering emulsion. Finally, drop 60mL of 1.26mol / L h...

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Abstract

The invention discloses a magnetic microencapsulated phase change energy storage material with magnetic and thermal energy storage functions and a preparation method thereof. A wall material of microcapsules is a magnetic ferrite / silica inorganic hybrid material with the magnetic function and a core material can be paraffin and a higher fatty alcohol, acid and ester type organic phase change energy storage material. The preparation method of the magnetic microencapsulated phase change energy storage material disclosed by the invention comprises the steps of firstly synthesizing magnetic ferrite nanoparticles and further assembling the magnetic ferrite nanoparticles in a solvent to the surfaces of suspended oil droplets of the organic phase change energy storage material through a Pickering emulsion technology; finally forming silica gel on the surface of the phase change energy storage material through an interfacial polymerization technology to fix the magnetic ferrite nanoparticles on the surfaces of the oil droplets of the organic phase change energy storage material so as to form the microcapsules using the magnetic ferrite / silica hybrid wall material to coat the phase change energy storage material.

Description

technical field [0001] The invention relates to a microencapsulated phase-change energy storage material, in particular to a microencapsulated organic phase-change energy storage material whose wall material has a magnetic function and a preparation method thereof. Background technique [0002] As the driving force of production and life in human society, energy is closely related to the development of modern society and economic prosperity. Today, the world's energy has entered a new period of change. The problem of energy shortage has appeared in most countries and even in the whole world, and has become a common problem faced by all countries in the world. Since the supply and demand of energy have a strong time dependence in many cases, in order to use it reasonably, it is necessary to store temporarily unused energy and release it when needed. Utilization efficiency is undoubtedly very important. The research and development of energy storage materials is proposed to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/02
Inventor 汪晓东蒋富云武德珍
Owner 上海弈峋科技有限公司
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