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A photothermal conversion type organic/inorganic composite phase change energy storage material and its preparation method

A phase-change energy storage material and inorganic composite technology, which are applied in the field of photothermal conversion organic/inorganic composite phase-change energy storage materials and their preparation, and can solve the problems of discontinuous and unstable solar radiation, and visible light having no thermal effect.

Active Publication Date: 2019-04-30
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two problems in the utilization of solar energy: (1) the disadvantages of discontinuity and instability in solar radiation; (2) visible light, which accounts for about 40% of solar radiant energy, does not have a direct thermal effect and is difficult to use directly
This method is achieved by grafting dyes to modify phase change materials, which is cumbersome and complicated to prepare.

Method used

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  • A photothermal conversion type organic/inorganic composite phase change energy storage material and its preparation method
  • A photothermal conversion type organic/inorganic composite phase change energy storage material and its preparation method
  • A photothermal conversion type organic/inorganic composite phase change energy storage material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0206] Add 1.0g of mercaptopropyltrimethoxysilane, 10.0g of water, and 20g of ethyl orthosilicate into a three-necked flask for mixing, adjust the pH to 2 with 10% mass concentration of hydrochloric acid solution, stir in a constant temperature water bath at 25°C for 30 minutes, and then add active Yellow 14 (one of the dyes (30)) 1.0g, react in a constant temperature water bath at 80°C for 1h, add 105g of melted PEG6000 to the above reaction solution, continue the reaction for about 30min, add Na 2 CO 3 The pH of the solution was adjusted to 8 to obtain a homogeneous gel. The product was transferred out, dried and pulverized to obtain 113g of photothermal conversion organic / inorganic composite phase change energy storage material. Material phase change enthalpy: ΔH m =171.5J / g, ΔH c = 167.9 J / g. (ΔH of pure PEG6000 m =181.5J / g, ΔH c = 177.9 J / g). The content of PEG in the composite phase change material is 93.0%.

Embodiment 2-11

[0208] Adopt reactive yellow 15 (a kind of in dyestuff (30), reactive yellow 25 (a kind of in dyestuff (31), reactive yellow 57 (a kind of in dyestuff (31)) and reactive yellow 184 (dye (30) )), reactive red 49 (one of the dyes (32)), reactive orange 7 (one of the dyes (32)), reactive orange 16 (one of the dyes (32)), reactive violet 4 (a kind of in the dyestuff (32)), reactive blue 19 (a kind of in the dyestuff (34), reactive blue 27 (a kind of in the dyestuff (34)) replace the reactive yellow 14 of above-mentioned embodiment 1, with The reaction of mercaptopropyltrimethoxysilane and ethyl orthosilicate in Example 1 yields a light-to-heat conversion type organic / inorganic composite phase change energy storage material, and other conditions are consistent with Example 1. Material phase transition enthalpy ΔH m =163.7-170.1J / g, ΔH c = 163.9-167.6 J / g. (ΔH of pure PEG6000 m =181.5J / g, ΔH c = 177.9 J / g). The content of PEG in the composite phase change material is 92%-95%. ...

Embodiment 12-22

[0210] 1.0 g of 3-aminopropyltriethoxysilane was used instead of 1.0 g of mercaptopropyltrimethoxysilane in Examples 1-11. Use reactive yellow 14 (a kind of in dyestuff (30), reactive yellow 15 (a kind of in dyestuff (30), reactive yellow 25 (a kind of in dyestuff (31)), reactive yellow 57 (dye (31) )) and reactive yellow 184 (one of the dyes (30)), reactive red 49 (one of the dyes (32)), reactive orange 7 (one of the dyes (32)), reactive orange 16 (one of the dyes (32)), reactive violet 4 (one of the dyes (32)), reactive blue 19 (one of the dyes (34)), reactive blue 27 (one of the dyes (34) 1) Participate in the reaction to obtain a light-to-heat conversion type organic / inorganic composite phase-change energy storage material, and other conditions are the same as in Example 1. Material phase transition enthalpy ΔH m =164.1-170.5J / g, ΔH c = 164.1-167.8 J / g. (ΔH of pure PEG6000 m =181.5J / g, ΔH c = 177.9 J / g). The content of PEG in the composite phase change material is 9...

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Abstract

The invention belongs to the technical field of energy storage, and in particular discloses a photothermal conversion type organic / inorganic composite phase-change energy storage material and a preparation method thereof. Polyethylene glycol (PEG) is taken as an organic phase-change component, and dye modified silicon dioxide is taken as an inorganic support material. The structural formula of the support material is as shown in formula (1) in the specification. In the formula, n is greater than or equal to 2 and less than or equal to 5; n is an integer; A is a linking group; D is a dye color base. According to the material, dye is combined to a silicon dioxide support material in a chemical band mode, visible light can be absorbed by dye, converted into heat and stored in the phase-change material PEG, and conversion and storage integration of solar energy is achieved. In addition, by adopting the modified support material, the covering amount for PEG can be effectively improved, and the heat storage density can be increased. The material can be applied to conversion and storage of solar energy, and is simple in synthesis process, convenient to use and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and specifically relates to a photothermal conversion type organic / inorganic composite phase change energy storage material and a preparation method thereof. Background technique [0002] Solar energy has the characteristics of clean source, inexhaustible supply, etc. It has become one of the effective ways to solve global problems such as human energy crisis, environmental pollution and greenhouse effect, and is an ideal alternative energy source for the development of human society. At present, there are two problems in the utilization of solar energy: (1) the disadvantages of discontinuity and instability in solar radiation; (2) visible light, which accounts for about 40% of solar radiant energy, has no direct thermal effect and is difficult to use directly. [0003] Phase change materials have approximately constant temperature in the process of absorbing and releasing energy, and have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 鄢冬茂蔡文蓉
Owner SHENYANG RES INST OF CHEM IND
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