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A large-scale preparation method of superhydrophobic surface of aluminum foil fin group of heat exchanger

A super-hydrophobic surface, fin group technology, applied in ion implantation plating, coating, metal material coating process and other directions, can solve the problems of difficult to large-scale application, difficult to prepare large area, difficult to prepare on a large scale, etc. Achieve the effect of reducing damage, uniform performance and uniform performance

Active Publication Date: 2017-06-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing research still has the following difficulties and problems: first, it is difficult to prepare in a large area; second, it is difficult to prepare on a large scale; third, the process is complicated
In addition, due to the difficulty of large-scale preparation, existing research is mostly limited to the research on the preparation of superhydrophobic surfaces of monolithic materials.
At the same time, there are few technological methods for preparing superhydrophobic surfaces on the surface of metal aluminum foil materials in large quantities.
At present, some existing methods for preparing superhydrophobic surfaces on the surface of metal materials require mechanical processing on the metal surface first, using physical methods to prepare micron-scale rough structures, and then using chemical methods to construct nano-scale rough structures. Complex and difficult to apply on a large scale

Method used

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  • A large-scale preparation method of superhydrophobic surface of aluminum foil fin group of heat exchanger
  • A large-scale preparation method of superhydrophobic surface of aluminum foil fin group of heat exchanger
  • A large-scale preparation method of superhydrophobic surface of aluminum foil fin group of heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Pretreatment: ultrasonically clean the aluminum foil fin group of the heat exchanger with acetone and deionized water, blow dry, immerse in 1mol / L sodium hydroxide aqueous solution, treat at room temperature for 30s, and then wash with ethanol and deionized water in sequence. Rinse with water, dry and set aside; the aluminum element content of the aluminum foil fins of the heat exchanger is more than 99.0wt%, and the number of fins is more than 10;

[0042] (2) Etching treatment: using the mixed aqueous solution of hydrochloric acid and glycerol as the etching solution, put the aluminum foil fins of the heat exchanger in a group of close-packed groups in the etching solution under the condition of a water bath at 40°C, and etch The time is 120s. After the etching is finished, the aluminum foil is taken out, cleaned with ethanol and deionized water and blown dry. The mixed aqueous solution of hydrochloric acid and glycerin is prepared by the following method: analytic...

Embodiment 2

[0047] (1) Pretreatment: ultrasonically clean the aluminum foil fin group of the heat exchanger with acetone and deionized water, dry it, and immerse it in 1mol / L sodium hydroxide aqueous solution, treat it at room temperature for 60s, and then wash it with ethanol, deionized water, etc. Rinse with water, dry and set aside; the aluminum element content of the aluminum foil fins of the heat exchanger is more than 99.0wt%, and the number of fins is 30 pieces;

[0048] (2) Etching treatment: using the mixed aqueous solution of sodium hydroxide and glycerol as the etching solution, put the closely packed aluminum foil fins of the heat exchanger in the etching solution under the condition of 60°C water bath, The etching time is 80s. After the etching is finished, take out the aluminum foil, wash it with ethanol and deionized water and blow it dry. The mixed aqueous solution of sodium hydroxide and glycerol is prepared by the following method: sodium hydroxide analytically pure and ...

Embodiment 3

[0052] (1) Pretreatment: ultrasonically clean the aluminum foil fin group of the heat exchanger with acetone and deionized water, dry it, and immerse it in 1mol / L sodium hydroxide aqueous solution. Rinse with water, dry and set aside; the aluminum element content of the aluminum foil fins of the heat exchanger is more than 99.0wt%, and the number of fins is 50 pieces;

[0053] (2) Etching treatment: using the mixed aqueous solution of hydrochloric acid and glycerol as the etching solution, put the closely packed aluminum foil fins of the heat exchanger in the etching solution under the condition of a water bath at 60°C, and etch The time is 90s. After the etching is finished, take out the aluminum foil, wash it with ethanol and deionized water and blow it dry. The mixed aqueous solution of hydrochloric acid and glycerin is prepared by the following method: add analytically pure hydrochloric acid and glycerin to remove In deionized water, a mixed aqueous solution of hydrochlori...

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Abstract

The invention relates to a method for large-scale preparation of super-hydrophobic surface of heat exchanger aluminum foil fin groups. Treatment: use acidic or alkaline aqueous solution as the etching solution, put the aluminum foil fin group of the heat exchanger under the condition of water bath, etch in the etching solution, take it out, clean it and dry it, the acidic or alkaline aqueous solution Add glycerol or polyethylene glycol as additives; weakly alkaline boiling water treatment: place the etched aluminum foil fins of heat exchangers in weakly alkaline boiling water for 1 to 2 hours, and cool with water Take it out after reaching room temperature, wash it with water and dry it; chemical modification: place the treated aluminum foil fin group in a glass tank, and modify it by fluorosilane vapor deposition method to obtain a superhydrophobic aluminum foil fin group. The invention has the advantages of simple preparation process, no pollution, little base damage and good appearance quality, is suitable for aluminum foil fins of heat exchangers of various sizes, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a large-scale preparation method for the super-hydrophobic surface of an aluminum foil fin group of a heat exchanger. Background technique [0002] As a key component of heat transfer and exchange in air conditioners, refrigeration equipment, air source heat pumps, etc., although the hydrophilic treatment of the surface of the aluminum foil fins of the heat exchanger / evaporator and intermittent heating and defrosting can solve the problems of condensation water bridges and corrosion, the hydrophilic The existence of coating and dew condensation water film on the surface reduces the heat transfer coefficient of the aluminum foil. It will affect the indoor temperature, and the defrosting water is difficult to desorb in time, and it is easy to frost again, which seriously affects the heat exchange efficiency and reliability of the air conditioner. When the frost is serious, the system may even shut down, and it is easy for the alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/20C23F1/36C23C22/66C23C14/12
Inventor 邵博文张友法聂乐文王宇谭晓慧刘粒祥彭沛
Owner SOUTHEAST UNIV
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