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Microcapsule preparation method of phase change material

A phase-change material and microcapsule technology, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., can solve the problems of easy rupture of capsules, low energy storage effect, and non-environmental protection, so as to reduce the production cost, The effect of reducing the chance of leakage and not reducing the heat storage capacity

Inactive Publication Date: 2012-09-19
巢启 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of phase-change energy storage microcapsules, which overcomes the presence of methanol in the phase-change microcapsules prepared by the existing method during the preparation process, which is not environmentally friendly, the capsule energy storage process is easy to break, and the energy storage effect is low. Not high enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of the nuclear phase: Take 33g of n-hexadecane and 808.3g of Span-808.3g, mix them and add them to the reactor, stir slowly at a speed of 500 rpm and heat to 55°C; then drop in deionized water 133g, Tween-600.83g, stir slowly at constant temperature for 20min, then increase the stirring speed to 4500r / min, stir for 5min, disperse and set aside;

[0019] (2) Prepare the shell phase: take 78g of deionized water, 22g of styrene, 48g of methyl methacrylate, and 5g of emulsifier disodium phenol ether sulfosuccinate, mix them in the reaction kettle at a speed of 350 rpm Slowly stir and heat up to 60°C; mix 0.15 g of ammonium persulfate with 4.1 g of deionized water to prepare an initiator for use; take 0.05 g of sodium metabisulfite and 15 g of deionized water to prepare for use as a catalyst for use.

[0020] (3) Add the shell phase dropwise to the core phase at a constant temperature of 80°C, and add the above-mentioned initiator and catalyst at the same tim...

Embodiment 2

[0022] (1) Preparation of the nuclear phase: Take 6g of n-decanoic acid and 1.5g of Span-801.5g, mix them and add them to the reactor, stir slowly at a speed of 550 rpm and heat to 55°C; then add 24g of deionized water dropwise , sodium lauryl sulfate 0.15g, stir slowly at a constant temperature for 20min, then increase the stirring speed to 4500r / min, stir for 5min, and disperse for later use;

[0023] (2) Prepare the shell phase: take 36g of deionized water, 11g of styrene, 24g of isooctyl acrylate, and 2.5g of emulsifier disodium phenol ether sulfosuccinate, mix them in the reactor at a speed of 300 rpm, Stir slowly and heat up to 60°C; mix 0.07g of ferrous sulfate with 2.0g of deionized water to prepare an initiator for later use; mix 0.03g of sodium pyrosulfite with 15g of deionized water to prepare for use as a catalyst for later use;

[0024] (3) Add the shell phase dropwise to the core phase at a constant temperature of 80°C, and add the above-mentioned initiator and c...

Embodiment 3

[0026] (1) Preparation of the nuclear phase: take 5g of n-docosane and n-octadecane each, 2.5g of Span-802.5g, mix them and add them to the reactor, stir slowly at a speed of 450 rpm and heat to 55 ℃; then add 40g of deionized water and Tween-600.4g dropwise, stir slowly at constant temperature for 20min, then increase the stirring speed to 6000r / min, stir for 5min, and disperse for later use.

[0027] (2) Prepare the shell phase: take 120g of deionized water, 30g of styrene, 65g of acrylic acid amide, and 6g of emulsifier polyoxyethylene fatty acid ester, mix them in the reactor at a speed of 300 rpm, stir slowly and heat up to 60°C; Mix 0.21g of potassium persulfate and 5.7g of deionized water to prepare an initiator for use; take 0.08g of sodium metabisulfite and 24g of deionized water to prepare for use as a catalyst for use;

[0028] (3) Add the shell phase dropwise to the core phase at a constant temperature of 80°C, and add the above-mentioned initiator and catalyst at ...

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Abstract

The invention discloses a microcapsule preparation method of a phase change material. The defects of containing of methanol, poor environment friendliness, easiness in cracking in a capsule energy storing process and poor energy storing effect exist in a phase change microcapsule prepared with the conventional method. The method comprises the following steps of: emulsifying a phase change material into a nuclear phase by adopting an interface polymerization method, wherein the phase change material accounts for 20-60 percent; preparing styryl and acrylate monomers into a shell phase; and mixing the two phases, polymerizing at the temperature of 80-160 DEG C, reacting for 2-6 hours, preserving heat for 1-4 hours, cooling and drying to obtain a phase change microcapsule. Formaldehyde is not required to be added in a preparation process, and a production process is environment-friendly; after a capsule is prepared, the capsule wall coating property is high, and reaction time is shortened; the method is low in preparation cost, has a simple and convenient process and contributes to industrial production; and the obtained product can be widely applied in the fields of building energy storage, energy saving, consumption reduction, spinning and the like.

Description

technical field [0001] The invention relates to a coating technology of phase change materials, specifically refers to a preparation method of phase change energy storage microcapsules, and belongs to the technical field of new materials. Background technique [0002] Phase change materials can absorb or release a large amount of latent heat during the phase change process, and are energy-saving materials that can be widely used in the fields of heat storage and temperature control. It was discovered in the 1960s and developed rapidly in European and American countries after the 1970s. It is widely used in HVAC, building energy saving, solar energy utilization, clothing insulation and other fields, and has great significance in energy saving and emission reduction. [0003] Phase change microcapsules are composite phase change materials with a core-shell structure formed by coating the surface of solid-liquid phase change material particles with a stable film using microcap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/18
Inventor 巢启刘海锋
Owner 巢启
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