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Preparation method of interpenetrating network formed phase-change material

An interpenetrating network and phase change material technology, which is applied in the field of aliphatic polymer compounds and their preparation, can solve the problem that no temperature-adjusting fibers and fabrics have been found for shape-changing phase change materials, thermosetting polymers lose their phase change heat storage capacity, and cross-phase It is difficult to control the connection density and other problems, so as to achieve the effect of excellent setting effect, good strength and low production cost.

Inactive Publication Date: 2013-05-01
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its phase transition temperature is high, but the thermal conductivity is too low, and the density of crosslinking points is difficult to control. Excessive crosslinking will become a thermosetting polymer and lose its phase transition heat storage capacity.
[0012] It can be seen that the above-mentioned composite methods have their own limitations more or less, especially a kind of shape-setting phase change material suitable for preparing temperature-adjusting fibers and fabrics by melt spinning has not been found.

Method used

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  • Preparation method of interpenetrating network formed phase-change material
  • Preparation method of interpenetrating network formed phase-change material
  • Preparation method of interpenetrating network formed phase-change material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Accurately weigh 4g of network monomer N-methylolacrylamide (NHMPA), 0.6g of cross-linking agent N,N-methylene bisacrylamide (BIS), 18.9g of phase change material polyethylene glycol (PEG2000), Add 24ml of distilled water into a flat-bottomed flask, and after dissolving, ultrasonically disperse for 5 minutes, then add initiator ammonium persulfate (APS) 0.12g, and continue ultrasonically dispersing for 5 minutes, so that the large and small molecules in the solution are mixed evenly. React at 75°C for 3 hours to generate a synchronous interpenetrating network hydrogel. The prepared gel was put into an electric heating constant temperature blast drying oven and dried to a constant weight to obtain an interpenetrating network shape-setting phase change material.

[0030] The prepared interpenetrating network shape-setting phase change material is tested for thermal insulation, and passed through the step cooling curve (see figure 1 ) analysis shows that the phase change ...

Embodiment 2

[0035] Accurately weigh 4g of network monomer N-methylolacrylamide (NHMPA), 0.8g of cross-linking agent N,N-methylene bisacrylamide (BIS), 11.3g of phase change material polyethylene glycol (PEG2000), Add 24ml of distilled water into a flat-bottomed flask, and after dissolving, ultrasonically disperse for 5 minutes, then add 0.1g of initiator ammonium persulfate (APS), and continue ultrasonically dispersing for 5 minutes, so that the large and small molecules in the solution are evenly mixed. The reaction was carried out at 75°C for 3 hours to generate a synchronous interpenetrating network polymer. The prepared polymer is put into an electric heating constant temperature blast drying oven and dried to a constant weight to obtain an interpenetrating network shape-setting phase change material.

Embodiment 3

[0037] Accurately weigh 4g of the network monomer N-methylolacrylamide (NHMPA), 0.6g of the cross-linking agent N,N-methylene bisacrylamide (BIS), 18.5g of the phase change material polyethylene glycol (PEG4000), Add 40ml of distilled water into a flat-bottomed flask, and after dissolving, ultrasonically disperse for 5 minutes, then add 0.08g of initiator ammonium persulfate (APS), and continue ultrasonically dispersing for 5 minutes, so that the large and small molecules in the solution are evenly mixed. React at 80°C for 3.5 hours to generate a synchronous interpenetrating network hydrogel. The prepared gel was put into an electric heating constant temperature blast drying oven and dried to a constant weight to obtain an interpenetrating network shape-setting phase change material.

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Abstract

The invention relates to a preparation method of an interpenetrating network formed phase-change material, comprising the following steps of: adding N-hydroxymethyl acrylamide as a network monomer, N, N-methylene-bisacrylamide as a cross linking agent, polyethylene glycol as a phase-change material and distilled water into a flask, ultrasonic-dispersing for 5 minutes after dissolving (the molar ratio of the cross linking agent to the network monomer is (1 / 7):(1 / 11), the mass ratio of the network monomer to the water is (1 / 6):(1 / 14), and the proportion of the polyethylene glycol accounts for 40-80 percent of the total mass); adding ammonium persulfate as an initiator and continuously ultrasonic-dispersing for 5 minutes, wherein the mass fraction of the initiator accounts for 1.5-3.5 percent of the network monomer; and reacting at a temperature of 70-80 DEG C for 3-4 hours to generate interpenetrating network hydrogel, and then drying to a constant weight to obtain the interpenetrating network formed phase-change material. The preparation method has a simple process and a low production cost and is friendly to environment. Moreover, the phase-change material has the advantages of high enthalpy (reaching over 108.41J / g), less loss, suitable phase-change temperature (32-42 DEG C) and good performance in high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of aliphatic macromolecular compounds with amide groups and a preparation method thereof, and relates to a preparation method of a polymer with a hydroxyl group and an acrylamide monomer to form a network hydrogel under the action of a crosslinking agent. Background technique [0002] With the rapid development of global industry, the world's energy is becoming increasingly tense, and people are beginning to pay more and more attention to energy conservation and new energy development. In order to solve the contradiction between thermal energy supply and demand mismatch, improve energy utilization efficiency and protect the environment, according to Due to changes in the external environment, heat storage technology that automatically adjusts the temperature within a certain temperature range has emerged as the times require. Phase change heat storage technology is an important form of latent heat storage te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06C08L71/08C08L33/24C08F220/58C08F222/38D01F8/16D01F8/10
Inventor 张鸿王晓磊王倩倩刘辉杨淑瑞孙狄克
Owner DALIAN POLYTECHNIC UNIVERSITY