Method for preparing composite phase change energy storage material and phase change material

Abstract

The invention relates to a method for preparing a composite phase change energy storage material and a phase change material. The method comprises the following steps of: (1) preparing raw materials of microcrystalline cellulose, sulfuric acid with the concentration of 98% and sodium polyacrylate; (2) preparing nanocrystalline cellulose suspension according to the microcrystalline cellulose and sulfuric acid with the concentration of 98%; and (3) putting the nanocrystalline cellulose suspension in a beaker, adding deionized water into the beaker, performing even stirring, putting the beaker ina thermostat water bath, and adding the sodium polyacrylate slowly while stirring is performed until the sodium polyacrylate is mixed with the nanocrystalline cellulose suspension thoroughly and evenly so as to form the composite phase change energy storage material, wherein the mass / volume ratio (g / ml) of the sodium polyacrylate to the nanocrystalline cellulose suspension is not greater than 1:3, and the constant temperature in the thermostat water bath is not higher than 35 DEG C. The method for preparing the sodium polyacrylate-nanocrystalline cellulose composite phase change energy storage material which is suitable for low temperature transportation and storage of fruits is provided, and the phase change material is provided.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a preparation method of a composite phase change energy storage material and a phase change material, in particular to a preparation method of a sodium polyacrylate-nanometer microcrystalline cellulose composite phase change energy storage material and a phase change material. Background technique [0002] In recent years, with the rapid development of my country's economy, people's living standards have been continuously improved, and consumption concepts are gradually changing. Consumers' demand for fruit is increasing, and the quality requirements of fruit are also constantly improving. The production of fruit has obvious regional characteristics. The fruits in the south are mostly bananas, kiwi, litchi, bayberry, etc., while the fruits in the north are mainly apples, pears, strawberries, grapes, etc. To meet the needs of consumers all over the country for various fruits, it must be ac...

AI Technical Summary

Problems solved by technology

Although the scale of my country's cold chain market has reached 112 million tons, the comprehensive cold chain circulation rate is less than 20%, and the cold chain capacity is insufficient

[0007] At present, there is still a lack of research on PCMs in low temperature storage at home and abroad, and there is no mature development system

However, some known phase change cold storage materials have problems such as unadjustable phase change temperature, low thermal conductivity, toxic materials that cannot be used in food cold chain transportation, and high degree of supercooling. As a result, many PCMs materials cannot play their due roles well. use

Images