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A kind of preparation method of cellulose-based radiation temperature regulating material

A cellulose-based and cellulose-based technology is applied in the field of preparation of cellulose-based radiation temperature-regulating materials, which can solve the problems of high production cost, unfavorable industrial application, complex and expensive processing equipment, etc., and achieves low raw material and production costs, good biological Effects of degradability and biocompatibility, excellent thermoregulation effect

Active Publication Date: 2022-07-12
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, radiation refrigeration materials such as metamaterials or photonic crystals, which have been studied more at present, are expensive to manufacture, and complex and expensive processing equipment is often required in the production process, which is not conducive to industrial applications.

Method used

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  • A kind of preparation method of cellulose-based radiation temperature regulating material
  • A kind of preparation method of cellulose-based radiation temperature regulating material
  • A kind of preparation method of cellulose-based radiation temperature regulating material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 1 g of commercial microcrystalline cellulose was added to 100 mL of 64% sulfuric acid solution, reacted at 45°C for 45 minutes, the solution was washed to near neutrality by suction filtration and centrifugation, and configured into cellulose nanocrystals with a concentration of 1 wt.% After adding 1 g of sodium periodate and reacting at room temperature for 2 hours, the impurities in the solution were removed by suction filtration and centrifugation, and the dispersion liquid was prepared into an aldehyde-modified cellulose nanocrystal dispersion with a concentration of 0.5 wt.%, and an organic phase change was added. Material Polyethylene glycol, add 0.1g melamine and 0.1g triaminobenzene as cross-linking agent, fully stir and dissolve and adjust the pH of the solution to 2 to obtain cellulose nanocrystal / polyethylene glycol composite hydrogel, which can be obtained after freeze-drying. A cellulose nanocrystal / polyethylene glycol composite material with radiation tempe...

Embodiment 2

[0038] Disperse 1g of manufactured paper into 20ml of aqueous solution by high-pressure homogenization method, remove impurities in the solution by suction filtration and centrifugation and prepare a cellulose dispersion with a concentration of 1wt.%, add 5g of ammonium persulfate, and react at 70°C for 10h Afterwards, impurities in the solution were removed by suction filtration and centrifugation, and the solution was prepared into a carboxylated cellulose dispersion with a concentration of 1 wt.%. 1 g of adipic acid dihydrazide was added to prepare amino-modified cellulose, and impurities in the solution were removed by suction filtration and centrifugation, and the solution was prepared into a dispersion liquid of amino-modified cellulose with a concentration of 10 wt.%. Disperse 1g of filter paper into 20ml of aqueous solution by high-pressure homogenization method, remove impurities in the solution by suction filtration and centrifugation, and prepare a cellulose dispersi...

Embodiment 3

[0040] After adding 2g straw and 20g deionized water to a ball mill at 300 rpm for 10 hours, the solution was washed by suction filtration and centrifugation to remove impurities, and prepared into a cellulose dispersion with a concentration of 1 wt.%. The carboxylated modified cellulose dispersion was prepared by TEMPO oxidation system, 1 g of adipic acid dihydrazide was added to synthesize amino modified cellulose, the impurities in the solution were removed by suction filtration and centrifugation and the concentration was 5wt.% of amino-modified cellulose dispersions. Add 1 mL of glutaraldehyde solution with a concentration of 50%, fully stir and dissolve, and adjust the pH of the solution to 5 to obtain a cellulose hydrogel, which can be freeze-dried to obtain a cellulose aerogel. Cellulose aerogels were impregnated into molten phase change material paraffin to obtain cellulose / paraffin composites with radiation temperature regulation function.

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Abstract

The invention belongs to the technical field of energy-saving materials, and in particular relates to a preparation method of a cellulose-based radiation temperature-regulating material, comprising the following steps: uniformly dispersing the cellulose material in a solvent, and performing functional modification on the cellulose material to obtain the functional modification chemically cross-linking the functionalized modified cellulose material dispersion to obtain a cellulose-based gel; encapsulating the phase change material in the cellulose-based gel, and drying to obtain the cellulose-based radiation temperature control material. The invention prepares the radiation temperature regulation material based on the renewable cellulose, and can realize the excellent radiation temperature regulation effect under the synergistic effect of the excellent heat storage and release capacity of the phase change material and the radiation refrigeration characteristic of the cellulose matrix; and the preparation process is simple. , low cost, environmentally friendly and non-toxic, and has broad application prospects in the fields of building energy conservation.

Description

technical field [0001] The invention belongs to the technical field of energy-saving materials, and in particular relates to a preparation method of a cellulose-based radiation temperature-regulating material. Background technique [0002] According to statistics, 30% of the world's energy consumption comes from building energy consumption, of which indoor temperature adjustment methods such as air conditioning and refrigeration account for the largest energy consumption, accounting for about 2 / 3 of the total building energy consumption. However, with the development of society, the rapid consumption of traditional energy and the resulting environmental pollution have gradually become a huge challenge facing the world. At the same time, with the intensification of global warming and people's higher and higher requirements for the quality of life, it is of great practical significance to develop a passive, low-energy and environmentally friendly intelligent temperature-regula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08J9/28C08L1/04C08L1/02C08L71/02C08L91/06
CPCC08J9/40C08J9/286C08J2301/04C08J2301/02C08J2471/02C08J2491/06Y02P20/10
Inventor 程淼刘波李宛飞凌云胡敬魏涛刘倩倩
Owner SUZHOU UNIV OF SCI & TECH
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