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Multi-element composite solid-solid phase-change material and preparation method thereof

A phase-change material and multi-component compounding technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of rare application, difficult packaging, high cost, etc., and achieve simple process, low production cost, and alleviate phase change performance The effect of the decline

Inactive Publication Date: 2012-06-13
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the phase change materials used as heat storage and temperature regulating fibers are mostly focused on the solid-liquid phase transition with high phase transition enthalpy. However, its inherent liquid phase transition has caused technical problems of difficult packaging, even the most mature microcapsules The method is also difficult to be accepted by the public because of the high cost
From the perspective of the preparation method of heat storage and temperature regulating fibers, wet spinning is the most common application at present, while the application of traditional melt spinning technology, which is relatively environmentally friendly and simple in process, is rarely reported.

Method used

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  • Multi-element composite solid-solid phase-change material and preparation method thereof
  • Multi-element composite solid-solid phase-change material and preparation method thereof
  • Multi-element composite solid-solid phase-change material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Dissolve 2.7g PEGA, 0.3g NMA, 4.5g PEG4000 in 18ml deionized water, fully disperse and mix evenly in ultrasonic dispersion, add 0.06g N-N, methylenebisacrylamide, 0.045g ammonium persulfate, and raise the system temperature to 75°C , reacted for 3.5 hours to form a hydrogel with a cross-linked network structure, and freeze-dried for 48 hours to obtain a copolymer blended gel phase change material PEGA-NMA / PEG.

[0033] Carry out SEM analysis to the section of above-mentioned phase change material [see figure 1 ], the two-phase structure of the composite material prepared by this method is uniformly dispersed, and no obvious phase separation can be seen. It can also be seen from the figure that the freeze-drying has preserved the three-dimensional network structure obtained by the composite material to the greatest extent, and the composite material is uniformly dispersed. With pores ranging in diameter from one micron to several microns, the copolymerization and blendi...

Embodiment 2

[0038] Dissolve 2.1g of PEGA, 0.9g of NMA, and 2g of PEG4000 in 18ml of deionized water, disperse and mix well in ultrasonic dispersion, add 0.06g of N-N, methylenebisacrylamide, and 0.045g of ammonium persulfate, and raise the temperature of the system to 75°C. After reacting for 2 hours, a hydrogel with a cross-linked network structure was formed, and freeze-dried for 48 hours to obtain a copolymer blended gel phase change material.

Embodiment 3

[0040] Dissolve 2.4g of PEGA, 0.6g of NMA, and 2g of PEG4000 in 24ml of deionized water, disperse and mix well in ultrasonic dispersion, add 0.09g of N-N, methylenebisacrylamide, 0.045g of ammonium persulfate, and raise the temperature of the system to 75°C. After reacting for 3 hours, a hydrogel with a cross-linked network structure was formed, and dried by blowing for 48 hours to obtain a copolymer blended gel phase change material.

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Abstract

The invention discloses a preparation method of a multi-element composite solid-solid phase-change material. The preparation method comprises the following steps: dissolving polyethylene glycol acrylate (PEGA), N-hydroxylmethyl acrylamide (NMA) and polyethylene glycol (PEG) in deionized water; carrying out ultrasonic dispersion; adding a crosslinking agent and an initiator; heating to 70-80 DEG C to react for 2-5 hours, so as to form hydrogel with a crosslinking network structure; and drying the hydrogel at the temperature of 35 DEG C, so as to obtain the multi-element composite PEGA-NMA / PEG solid-solid phase-change material. According to the invention, the chemical immobilization of PEG is achieved through copolymerization reaction of PEGA and NMA, and an interpenetrating network is formed under the action of the crosslinking agent to realize the network immobilization of the blending component PEG, so as to obtain a novel composite phase-change material. By using the method, solid-solid phase-change transformation is achieved, the thermal resistance of the phase-change material is improved, and the obtained phase-change material can be used as a heat-storage functional additive for melt spinning.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage materials, in particular to a multi-component composite solid-solid phase change material and a preparation method thereof. Background technique [0002] The development of heat-storing and temperature-regulating fibers not only realizes the recycling of energy and alleviates the energy crisis, but also its functionality meets people's growing material needs. At present, the phase change materials used as heat storage and temperature regulating fibers are mostly focused on the solid-liquid phase transition with high phase transition enthalpy. However, its inherent liquid phase transition has caused technical problems of difficult packaging, even the most mature microcapsules The law is also difficult to be accepted by the public because of its high cost. From the perspective of the preparation method of heat-storing and temperature-regulating fibers, the current application is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02C08F290/06C08F220/58C08J3/24C08J3/075
Inventor 张鸿王倩倩相恒学孙狄克刘辉杨淑瑞
Owner DALIAN POLYTECHNIC UNIVERSITY
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