Preparation method of interpenetrating network formed phase-change material

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...

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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.

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