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Hydrophilic aluminum foil with organic-inorganic hybrid coating, and preparation method and application thereof

A hydrophilic aluminum foil and coating technology, which is applied in the field of aluminum foil, can solve the problems of no investigation on the flatness of the film, poor adhesion of the hydrophilic coating, and high curing temperature, and achieve the effects of low cost, good adhesion, and simple preparation method

Active Publication Date: 2014-10-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has high curing temperature and high energy consumption
However, no silane coupling agent is used for pretreatment, and the adhesion of the hydrophilic coating on the surface of the aluminum foil is poor due to the poor compatibility between the organic material and the metal-inorganic material.
And this patent application does not carry out the doping of inorganic hydrophilic nanoparticles, and does not investigate the influence of the flatness of the surface of the membrane on the hydrophilicity

Method used

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  • Hydrophilic aluminum foil with organic-inorganic hybrid coating, and preparation method and application thereof
  • Hydrophilic aluminum foil with organic-inorganic hybrid coating, and preparation method and application thereof
  • Hydrophilic aluminum foil with organic-inorganic hybrid coating, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] (1) Add 50g of tetraethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-neck flask, heat in a constant temperature water bath at 35°C and keep stirring. After stirring evenly, weigh 0.5g of 25% Add ammonia water to 30g of deionized water, drop it into a four-necked flask at a rate of 1ml / min with a constant flow pump, keep warm for 4 hours, and discharge to prepare a nano-silica sol with a particle size of about 10nm, with a mass content of nanoparticles of 20%. The structure of the synthesized nanoparticles was tested by a Fourier transform infrared tester, and the figure 1 The infrared spectrum is visible at 3400cm ‐1 There is a strong absorption peak at , which is the absorption peak of hydroxyl-OH, at 930cm ‐1 The stretching vibration peak of silanol Si-OH is at 1000-1100cm ‐1 The strong and broad absorption peak is the stretching vibration absorption peak of Si-O, and there is also the stretching vibration absorption peak of Si-O-Si (tet...

Embodiment 2

[0039] (1) Add 50g of tetraethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-neck flask, heat in a constant temperature water bath at 80°C and keep stirring. After stirring evenly, weigh 0.5g of 25% Add hydrochloric acid to 30 g of deionized water, drop it into a four-neck flask with a constant flow pump at a rate of 1 ml / min, keep warm for 4 hours, and discharge to prepare a nano-silica sol with a particle size of 500 nm, and the mass content of the nanoparticles is 35%. The structure of the synthesized nanoparticles was tested with a Fourier transform infrared tester, and figure 1 resemblance.

[0040] (2) hydroxyl acrylic resin is mixed with 20% aqueous solution to obtain hydrophilic film-forming agent;

[0041] (3) Mix the nano-sol in step (1) with the hydrophilic film-forming agent obtained in step (2) according to the solute mass ratio of 1:5, add 5g of glutaraldehyde, dilute with water and prepare a solution with a mass concentration of 10%....

Embodiment 3

[0047] (1) Add 50g of tetramethoxysilane, 100g of absolute ethanol and 20g of deionized water into a four-necked flask, heat it in a constant temperature water bath at 35°C and keep stirring. After stirring evenly, weigh 0.5g of 25% Sodium bicarbonate, add 30g deionized water, drip in the four-necked flask with the speed of 1.5ml / min with constant flow pump, after keeping warm for 5h, discharge the material to prepare the nano-silica sol with particle diameter 200nm, the mass content of nano-particles is 35% . The structure of the synthesized nanoparticles was tested with a Fourier transform infrared tester, and figure 1 resemblance;

[0048] (2) Polyethylene glycol is formulated into a 1% aqueous solution to obtain a hydrophilic film-forming agent;

[0049] (3) the nano sol in the step (1) is mixed with the hydrophilic film-forming agent obtained in the step (2) in a solute mass ratio of 1:1, add 1g of diisocyanate, and dilute with water to form a solution with a mass conce...

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Abstract

The invention discloses an organic-inorganic hybrid hydrophilic aluminum foil coating, and a preparation method and an application thereof. According to the method, a hydrophilic polymer film-forming agent is dissolved into water according to a mass ratio of 1-99%, such that a film-forming agent solution is prepared; inorganic nano-grade particles prepared with a raw material of tetraethoxysilane, tetramethoxysilane or tetraethoxytitanium are doped in; a cross-linking agent is added; water is added for dilution, and ultrasonic dispersing is carried out, such that the mixture is well dispersed, and the organic-inorganic hybrid hydrophilic aluminum foil coating is obtained. A silane coupling agent hydrolysate is adopted as a pretreatment agent for treating a well polished and cleaned aluminum foil surface; the hybrid hydrophilic aluminum foil coating is applied on the surface of the treated aluminum foil; and the coating is cured into a film with a heat curing method, such that a hydrophilic aluminum foil is obtained. The hydrophilic aluminum foil provided by the invention has a micro-nano binary rough structure on the surface. Water can spread quickly on the surface of the aluminum foil. A water contact angle of the aluminum foil is 0-5 DEG. Hydrophilic coating adhesion force reaches 0-1 level. The hydrophilic aluminum foil provided by the invention can be applied in various air conditioners, and has an excellent comprehensive performance.

Description

technical field [0001] The invention relates to an aluminum foil, in particular to a hydrophilic aluminum foil with an organic-inorganic hybrid coating, a preparation method thereof and an application in an air conditioner, and belongs to the technical field of organic-inorganic hybrid nano functional materials. Background technique [0002] Hydrophilic aluminum foil is the main raw material for heat exchangers in air conditioners, and is widely used in refrigeration equipment such as household air conditioners, refrigerators, and automotive air conditioners. The national standard GB / T3880-2006 stipulates that aluminum sheets with a thickness of less than 0.2mm are called aluminum foils. Hydrophilic aluminum foils are treated with a special process for the base material aluminum foil, and a layer of hydrophilic coating is coated on the surface. Condensed water will spread quickly on the hydrophilic aluminum foil without condensing into water droplets, thereby increasing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04C09D171/08C09D133/04C09D175/04C09D133/00C09D7/12B05D7/14B05D3/02B05D3/12B32B33/00
Inventor 涂伟萍袁腾周显宏王锋胡剑青
Owner SOUTH CHINA UNIV OF TECH
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