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Phase change microcapsule with complex structure and preparation method thereof

A phase change microcapsule, core-shell structure technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of decreased utilization rate of phase change materials, increased production process, low retention rate, etc. The effect of easy industrial production, expansion of application scope and convenient operation

Active Publication Date: 2014-06-11
中科世宇(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the microcapsules will release formaldehyde during use, which will cause harm to the human body if used in the construction field
"A Phase Change Energy Storage Microcapsule Prepared by Interfacial Polymerization" (Chinese Patent-200810068422.7, Publication Date: 2008.11.19) by Lai Maobai et al. uses vinyl monomer as the shell to solve the problem of formaldehyde release, but in In the production process, the monomer must be added dropwise continuously, which increases the production process
"A microcapsule of phase change material and its preparation method" by Zhang Xingxiang et al. (Chinese patent -200910070903.6, publication date: 2010.05.05) uses vinyl monomer as the shell layer, which not only solves the problem of formaldehyde release, but also One-step addition, no need to drop, the process is simple, but the enthalpy value retention rate is not high, only 60%, which reduces the utilization rate of phase change materials

Method used

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  • Phase change microcapsule with complex structure and preparation method thereof
  • Phase change microcapsule with complex structure and preparation method thereof
  • Phase change microcapsule with complex structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1, the preparation of the phase change microcapsule of complex structure

[0027] (1) Preparation of core-shell microcapsules: 10 g of sodium salt of 10% styrene-maleic anhydride alternating copolymer (the number-average molecular weight of the styrene-maleic anhydride alternating copolymer is 10000) The aqueous solution is added into 77g of water, and the pH value is adjusted to 4.5 with hydrochloric acid, and this solution is used as the water phase (in the water phase, the mass percentage of the sodium salt of styrene-maleic anhydride alternating copolymer is 1.1%); 10g of phase-change paraffin wax at ℃, 2g of oil-soluble monomer styrene, 1g of divinylbenzene, 0.06g of initiator azobisisobutyronitrile, heat up to 60℃, stir to mix the initiator, monomer and paraffin evenly as oil Phase (in the oil phase, the mass fraction ratio of paraffin wax to the total mass of styrene and divinylbenzene is 10:3, the mass fraction ratio of divinylbenzene to styrene is 1:...

Embodiment 2

[0030] Embodiment 2, the preparation of the phase change microcapsule of complex structure

[0031] (1) Preparation of core-shell microcapsules: 10 g of sodium salt of 10% styrene-maleic anhydride alternating copolymer (the number-average molecular weight of the styrene-maleic anhydride alternating copolymer is 10000) The aqueous solution is added into 77g of water, and the pH value is adjusted to 4.5 with hydrochloric acid, and this solution is used as the water phase (in the water phase, the mass percentage of the sodium salt of styrene-maleic anhydride alternating copolymer is 1.1%); 10g of phase-change paraffin wax at ℃, 2g of oil-soluble monomer styrene, 1g of divinylbenzene, 0.06g of initiator azobisisobutyronitrile, heat up to 60°C, stir to mix the initiator, monomer and paraffin evenly as oil Phase (in the oil phase, the mass fraction ratio of paraffin wax to the total mass of styrene and divinylbenzene is 10:3, the mass fraction ratio of divinylbenzene to styrene is 1...

Embodiment 3

[0034] Embodiment 3, preparation of complex structure microcapsules

[0035] (1) Preparation of core-shell microcapsules: 10 g of sodium salt of 10% styrene-maleic anhydride alternating copolymer (the number-average molecular weight of the styrene-maleic anhydride alternating copolymer is 5000) The aqueous solution was added into 77g of water, and the pH value was adjusted to 3 with hydrochloric acid, and this solution was used as the water phase (in the water phase, the mass percentage of the sodium salt of styrene-maleic anhydride alternating copolymer was 1.1%); 10g of phase-change paraffin wax at ℃, 2g of butyl acrylate, 1.0g of divinylbenzene, 0.06g of initiator azobisisobutyronitrile, heat up to 35°C, stir to make the initiator, monomer and paraffin mix uniformly as the oil phase ( In the oil phase, the mass fraction ratio of paraffin wax to the total mass of butyl acrylate and divinylbenzene is 10:3, the mass fraction ratio of divinylbenzene to butyl acrylate is 1:2, an...

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Abstract

The invention provides a phase change microcapsule with a complex structure and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out emulsion polymerization reaction of paraffin, or the paraffin and an olefin free radical monomer in aqueous solution a of an emulsifier under the condition that an initiator and a crosslinking monomer exist to obtain a phase change microcapsule with a core-shell structure, wherein the melting point of the paraffin is 10-80 DEG C; and (2) adding aqueous solution b of the emulsifier in the mixture of the olefin free radical monomer, the crosslinking monomer and the initiator for emulsification to obtain an oil-in-water emulsion, and using the emulsion for swelling polymerization of the phase change microcapsule with the core-shell structure to obtain the phase change microcapsule with the complex structure.

Description

technical field [0001] The invention relates to a phase-change microcapsule with a complex structure and a preparation method thereof, belonging to the field of energy storage materials and preparation thereof. Background technique [0002] With the rapid development of global industry, human beings' demand for energy is increasing day by day. At present, the global energy is increasingly in short supply, but the utilization rate of energy is not very high. In order to solve the contradiction between supply and demand of heat energy and improve energy utilization efficiency, energy storage technology should be used And born. Due to the advantages of high energy storage density, constant temperature, easy process control, and repeated use, phase change energy storage materials have become the most promising and most widely used energy storage materials. Phase-change energy storage materials refer to materials that can absorb heat (cold) from the environment or release heat (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06B01J13/14C08F212/08C08F212/36C08F2/24C08F220/18C08F220/14C08F222/14
Inventor 杨振忠王彦红张成亮
Owner 中科世宇(北京)科技有限公司