A kind of solar heat conversion absorbing film system and preparation method thereof

An absorbing film and heat conversion technology, applied in solar thermal devices, solar thermal power generation, chemical instruments and methods, etc., can solve difficult problems and achieve the effects of low equipment requirements, simple and easy preparation methods, and easy-to-obtain raw materials

Inactive Publication Date: 2011-12-21
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with organic alcohol solvents, it is more difficult to form a sol in an aqueous solution. So far, no hydrosol-gel method has been used to prepare Al 2 o 3 Related reports on solar-to-thermal conversion absorbing film systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] best practice

[0027] 1. Add 21.0 g of citric acid and 29.1 g of nickel nitrate hexahydrate into 50 mL of water in turn under stirring, and continue stirring until a clear 2.0 mol / L Ni sol is obtained.

[0028] 2. Add 21.0g of citric acid and 37.5g of aluminum nitrate nonahydrate to 50mL of water in turn under stirring, and continue stirring until a clear 2.0mol / L Al 2 o 3 Sol.

[0029] 3. Mix 15.3g tetraethyl orthosilicate and 50mL containing 0.001wt% HNO at room temperature3 Mix the aqueous solution, and add 0.1 wt% silicone modified polyoxyethylene ether surfactant and 0.1 wt% fatty alcohol polyoxyethylene ether AEO-9, and keep stirring until a homogeneous and clear 1.6mol / L SiO 2 Sol.

[0030] 4. Combine Ni sol and Al 2 o 3 The sol was mixed according to Ni:Al molar ratio = 80:20 and 1 wt% fatty alcohol polyoxyethylene ether AEO-9 was added. After stirring evenly, a Ni-Al with a nickel content of 80% and suitable wetting properties was obtained. 2 o 3 Mix t...

Embodiment 2

[0037] 1. Add 21.0g of citric acid and 29.1g of nickel nitrate hexahydrate into 50mL of water. After stirring and refluxing the temperature to 90°C, add 24.8g of ethylene glycol until a clear 2.0mol / L Ni sol is obtained. .

[0038] 2. Add 21.0g of citric acid and 37.5g of aluminum nitrate hexahydrate into 50mL of water. After stirring and refluxing the temperature to 90°C, add 24.8g of ethylene glycol until a clear 2.0mol / L Al 2 o 3 Sol.

[0039] 3. At room temperature, mix 15.3g tetraethyl orthosilicate and 50mL containing 0.005wt% HNO 3 Mix the aqueous solution, and add 0.1 wt% silicone-modified polyoxyethylene ether surfactant and 0.1 wt% phenolic polyoxyethylene ether TX-100, and keep stirring until a homogeneous and clear 1.6mol / L SiO 2 Sol.

[0040] 4. Combine Ni sol and Al 2 o 3 The sol was mixed according to the molar ratio of Ni:Al=90:10 and 0.5 wt% of phenolic polyoxyethylene ether TX-100 was added. After stirring evenly, a Ni-Al with a nickel content of 90% a...

Embodiment 3

[0047] 1. Add 21.9g of ethylenediaminetetraacetic acid and 14.6g of nickel nitrate hexahydrate to 50mL of water in turn under stirring, then add ammonia water to it until the pH of the solution is about 10, and obtain a clear 1.0mol / L Ni sol.

[0048] 2. Add 21.9g of ethylenediaminetetraacetic acid and 18.8g of aluminum nitrate hexahydrate to 50mL of water in turn under stirring, then add ammonia water to it until the pH of the solution is about 10, and obtain a clear 1.0mol / L Al 2 o 3 Sol.

[0049] 3. At room temperature, mix 7.6g tetraethyl orthosilicate and 50mL containing 0.001wt% HNO 3 Mix the aqueous solution, and add 0.1 wt% silicone modified polyoxyethylene ether surfactant and 0.1 wt% fatty alcohol polyoxyethylene ether AEO-6, and keep stirring until a homogeneous and clear 0.8mol / L SiO 2 Sol.

[0050] 4. Combine Ni sol and Al 2 o 3 The sol was mixed according to the molar ratio of Ni:Al=70:30 and 0.5 wt% fatty alcohol polyoxyethylene ether AEO-6 was added. Afte...

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Abstract

The invention relates to a solar photo-thermal transforming absorbing film system and a preparation method thereof. The transformation absorbing film system is of a three-layer structure, and composed of an absorbing bottom layer, an absorbing middle layer and an antireflective top layer, wherein the absorbing bottom layer and the absorbing middle layer are prepared from M-A12O3 mixed hydrosol which is composed of transition metal M salt and aluminium salt and has different contents of the M salt; and the antireflective top layer is prepared from A 12O3 collosol, SiO2 collosol, and A12O3-SiO2mixed collosol. The solar photo-thermal transforming absorbing film system has a low preparation cost, the preparation method is simple and feasible, and no environment pollution is caused; and the optical property of the film system can meet the practical application requirement, that is to say, the solar absorptivity is greater than 0.90, and the emissivity is less than 0.10.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a solar light-to-heat conversion absorption film system and a preparation method thereof. Background technique [0002] The solar thermal conversion absorbing film is the most important and core part of the solar collector, and plays a key role in the field of solar thermal utilization. Its manufacturing cost and performance directly affect the promotion of solar thermal utilization. M-Al 2 o 3 Composite thin film is a cermet thin film with excellent optical properties and stability, which is widely used as the surface of solar collectors. At present, common thin film preparation methods include physical vapor deposition methods such as vacuum evaporation, sputtering film formation and ion plating, and electrochemical deposition methods such as electroplating and anodic oxidation. However, the electrochemical method uses a large amount of harmful substances such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/48B32B9/04B32B15/00C23C20/08
CPCY02E10/40
Inventor 赵剑曦李镇祥
Owner FUZHOU UNIV
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