Preparation method of pectinate high-polymer phase-change energy storage material

A technology of phase-change energy storage materials and polymers, which is applied in the direction of heat exchange materials, chemical instruments and methods, and can solve the problems of reduced machinability and other issues

Active Publication Date: 2012-06-27
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent CN 102093552A discloses a method for preparing double-bond terminal phase-change monomers by modifying polyethylene glycol with acid chlorides, but the probability of acid chlorides attacking hydroxyl groups on both sides of polyethylene glycol is the same, and polyethylene glycol monoacrylate in the product And polyethylene glycol diacrylate is uncontrollable, and the phase change material prepared by free radical polymerization is easy to form a network structure, and the processability decreases

Method used

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  • Preparation method of pectinate high-polymer phase-change energy storage material
  • Preparation method of pectinate high-polymer phase-change energy storage material
  • Preparation method of pectinate high-polymer phase-change energy storage material

Examples

Experimental program
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Embodiment 1

[0031] In an ice-water bath, dissolve 50 g of polyethylene glycol monomethyl ether (MPEG) with a molecular weight of 2000 in 100 ml of dichloromethane, add 0.663 g of acid-binding agent sodium carbonate, and add 2.03 ml of acryloyl chloride to the system after a period of nitrogen gas flow; The temperature of the system was raised to 35°C, and reacted for 8 hours under the protection of nitrogen; under an ice-water bath, anhydrous ether was added to the reaction solution, allowed to stand for 10 minutes, and filtered under reduced pressure to obtain polyethylene glycol monomethyl ether acrylate; Dissolve 2g of glycol monomethyl ether ester and 0.080g of acrylamide in 2ml of water, add 0.020g of ammonium persulfate, and react in water at 75°C for 40 minutes to obtain a phase-change energy storage material with a comb-like molecular chain shape. The preparation reaction formula is shown in figure 1 . From the structural diagram ( figure 2 ) It can be seen that when the degree...

Embodiment 2

[0037]In an ice-water bath, dissolve 50 g of polyethylene glycol monomethyl ether (MPEG) with a molecular weight of 1000 in 100 ml of dichloromethane, add 2.650 g of acid-binding agent sodium carbonate, and add 4.06 ml of acryloyl chloride to the system after passing nitrogen for a period of time; The temperature of the system was raised to 40°C, and reacted for 6 hours under the protection of nitrogen; under an ice-water bath, add n-hexane to the reaction solution, let it stand for 15 minutes, and filter under reduced pressure to obtain polyethylene glycol monomethyl ether acrylate; Dissolve 2g of alcohol monomethyl ether ester and 0.240g of N-isopropylacrylamide in a composite solvent of 1ml of water-ethanol (v / v=5 / 95), add 0.020g of azobisisobutyronitrile, and dissolve in 70°C water After reacting for 30 minutes, a phase-change energy storage material with comb-like molecular chain morphology was obtained.

Embodiment 3

[0039] In an ice-water bath, dissolve 50 g of polyethylene glycol monomethyl ether (MPEG) with a molecular weight of 1000 in 100 ml of dichloromethane, add 1.325 g of acid-binding agent sodium carbonate, and add 8.12 ml of acryloyl chloride to the system after passing nitrogen for a period of time; The temperature of the system was raised to 35°C, and reacted for 8 hours under the protection of nitrogen; under an ice-water bath, diethyl ether was added to the reaction solution, allowed to stand for 15 minutes, and filtered under reduced pressure to obtain polyethylene glycol monomethyl ether acrylate; polyethylene glycol acrylic acid Dissolve 2g of monomethyl ether ester and 0.080g of acrylamide in 1ml of water, add 0.020g of ammonium persulfate, and react in water at 85°C for 120min to obtain a phase-change energy storage material with a comb-like molecular chain shape.

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Abstract

The invention relates to a preparation method of a pectinate high-polymer phase-change energy storage material, which comprises the following steps: (1) in an ice water bath, after dissolving polyethylene glycol monomethyl ether in dichloromethane, adding an acid binding agent and acryloyl chloride, heating to 35-40 DEG C, and reacting in a nitrogen atmosphere for 6-8 hours; (2) in the ice water bath, adding a precipitant into the reaction solution, standing for 10-15 minutes, and carrying out vacuum filtration to obtain the acrylate polyethylene glycol monoester; and (3) dissolving the acrylate polyethylene glycol monoester and acrylamide monomers in a solvent, adding an initiator, heating to 70-85 DEG C, and reacting for 30-120 minutes to obtain the phase-change energy storage material with pectinate molecular chain shape. The phase-change material prepared by the method provided by the invention can flow in the form of a melt in the hot working process, and the pectinate molecular chain shape can reduce the plastification action on the base; and the invention has the advantages of simple preparation technique and low production cost.

Description

technical field [0001] The invention belongs to the field of preparation of phase-change energy storage materials, and in particular relates to a preparation method of comb-shaped polymer phase-change energy storage materials. Background technique [0002] Phase change energy storage material (PCM) refers to the substance used for energy storage by utilizing the heat absorbed or released when its own structure and state change. PCM has the advantages of high energy storage density, nearly constant temperature in the heat storage and release process, and easy control of the process. It can effectively change the distribution of energy in time and space, so as to achieve the purpose of energy saving. It can be used to solve the contradiction between thermal energy supply and demand imbalance. It is one of the important technologies to improve energy utilization efficiency and protect the environment. [0003] Chinese invention patent CN 1079420C discloses a technology for pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/56C08F220/54C09K5/06
Inventor 朱美芳相恒学陈少华王瑞莉王俊发刘丰维李薇薇彭程
Owner DONGHUA UNIV
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