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Phase-change accumulation energy microcapsule prepared by interfacial polymerization method and its method

An interfacial polymerization method and a phase change energy storage technology, which is applied in the field of preparing phase change energy storage microcapsules by the interfacial polymerization method, can solve the problems of low yield, limited application of microcapsules, weak effect of coating interface layer, etc. Improve the performance of your application

Active Publication Date: 2011-03-23
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Many application methods of phase change materials are based on coatings, and the existing research on microcapsules mainly focuses on the synthesis and preparation of emulsions. Although the particle size can meet the requirements of fiber applications, the inhomogeneity of emulsion polymerization leads to the encapsulation. The problem of uneven coverage and low yield greatly limits the application of microcapsules in textile fibers
At the same time, the weak effect of the coating interface layer is also a factor affecting the application of microcapsules

Method used

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  • Phase-change accumulation energy microcapsule prepared by interfacial polymerization method and its method
  • Phase-change accumulation energy microcapsule prepared by interfacial polymerization method and its method
  • Phase-change accumulation energy microcapsule prepared by interfacial polymerization method and its method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 2g of sodium dodecylbenzenesulfonate to 100g of water as an emulsifier, add 20g of phase-change paraffin wax at 25°C, add 0.5g of azobisisobutyronitrile, heat up to 35-40°C, stir and disperse to form the desired particle size of paraffin droplets. Gradually raise the temperature of the system to 65-70°C, take 20g of methyl methacrylate, and slowly add it dropwise into the system, so that the monomer diffuses to the surface of the paraffin particles and undergoes a polymerization reaction, and the generated polymer coats the surface of the paraffin particles to form a phase into microcapsules. The phase change temperature of the phase change microcapsules is 25° C., and the particle size is about 0.7 μm.

[0040] The above system is directly mixed with viscose cellulose, the phase change microcapsules are dispersed in the viscose liquid, and viscose fiber filaments are prepared through the spinning process, which can be used for high-grade textiles and intelligent t...

Embodiment 2

[0042] Add 3g of potassium alkylarylsulfonate to 150g of water as an emulsifier, add 15g of phase-change paraffin wax at 25°C, 15g of phase-change paraffin wax at 35°C, add 0.8g of azobisisobutyronitrile, heat up to 40°C, stir and disperse, and form Paraffin particles of desired particle size. Gradually raise the temperature of the system to 65-70°C, take 30g of styrene, and slowly add it dropwise into the system, so that the monomer diffuses to the surface of the paraffin particles and undergoes a polymerization reaction, and the generated polymer coats the surface of the paraffin particles to form phase-change microcapsules . The phase change temperature of the phase change microcapsule is about 30°C, and the particle size is about 2-3 μm.

[0043] The above-mentioned phase-change microcapsule system is dried by a spray drying method to obtain a phase-change microcapsule dry powder. Using the dry powder as an additive for interior wall paint can make the building have a ce...

Embodiment 3-7

[0045] Embodiment 3-7 Using the process described in the present invention, the organic phase change material with the required melting point is dispersed in water with an emulsifier at a temperature above its melting point, and an oil-soluble initiator is added dropwise at a certain temperature. Monomer, the monomer diffuses to the surface of the phase-change micro-droplet, polymerizes, and obtains the phase-change microcapsule with the required phase-transition temperature. Each parameter list of each embodiment is as follows:

[0046] Table 1: Recipe

[0047] Reality

Shi

example

phase change material

/ g

water

/ g

Emulsifier

/ g

monomer

/ g

Initiator

/ g

3

25℃ Paraffin

30

150

Dodecyl

Benzenesulfonic acid 2

Methyl methacrylate

20

Azobisisobutyronitrile 0.

6

4

35℃ paraffin

30

150

Alkylarylsulfonate

Potassium 2

Styr...

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Abstract

The invention discloses a phase change energy storage microcapsule which is prepared by adopting the interfacial polymerization process, as well as the method thereof. The invention has the technical proposal that organic phase change material with the soluble oil melting point being 10 to 18 DEG C is taken as a core, vinyl radical monomer is taken as a housing polymer, water is taken as a polymerization medium, anionic surfactant is taken as an emulsifier, oil-soluble initiator is used for catalyzing the polymerization reaction, and the interfacial polymerization coating is carried out at the polymerization coating temperature, thereby obtaining the phase change microcapsule. The microcapsule is especially suitable for the textile material use of mixing, cladding, filling and pouring.

Description

technical field [0001] The invention relates to a phase-change energy storage material and its processing and preparation technology, in particular to a method for preparing phase-change energy storage microcapsules by using an interface polymerization method and its products. Background technique [0002] Phase change energy storage materials are smart materials that can improve energy utilization and absorb and release energy adaptively, and have shown application prospects in environmental temperature regulation. With the further deepening of research on phase change materials, phase change materials are gradually being applied. Using phase-change energy storage materials to make architectural interior decoration materials can make full use of environmental energy and obtain the effect of warming in winter and cooling in summer. [0003] With the improvement and diversification of people's clothing requirements, in addition to the external beauty and comfortable wearing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/16C09K5/02
Inventor 赖茂柏杜如虚孙蓉于淑会冷静
Owner SHENZHEN INST OF ADVANCED TECH
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