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Super-hydrophilic antibacterial aluminum foil

A super-hydrophilic, aluminum foil technology, used in antifouling/underwater coatings, biocide-containing paints, polyether coatings, etc., can solve the problem of increasing wind resistance, shortening the service life of air conditioners, inorganic aluminum foil substrates and organic Problems such as poor coating adhesion

Active Publication Date: 2022-07-29
HUANGSHAN TIANMA ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the air conditioner is cooling, the indoor heat exchanger absorbs heat, and the condensed water diffuses on the surface of the heat sink or appears in the shape of water droplets, resulting in the formation of water bridges between the fins, blocking air circulation, increasing wind resistance and noise, and reducing heat exchange efficiency; When it is hot, the condensed water of the outdoor heat exchanger adheres to the surface of the cooling fins in the form of frost, which not only increases the wind resistance, but also reduces the operating capacity of the warm air, resulting in an increase in the defrosting time, and the water bridge formed between the fins will The service life of the heat exchanger is reduced, mainly manifested in: the surface of the aluminum foil is easily corroded, the wind resistance and energy consumption are increased, and the service life of the air conditioner is shortened
[0003] In order to solve the above problems, an air-conditioning heat exchanger is prepared by using hydrophilic aluminum foil, but it is difficult to have both hydrophilicity and antibacterial properties of the existing aluminum foil, and the surface of the superhydrophilic aluminum foil is easy to breed bacteria to destroy the hydrophilic layer, and the inorganic aluminum foil substrate and The adhesion between organic coatings is poor, and the coatings are easy to fall off. Therefore, providing a super-hydrophilic aluminum foil with high comprehensive performance is a technical problem that needs to be solved at present.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] The present embodiment provides a kind of unsaturated tertiary amino derivative, which is made by the following steps:

[0032] Step B1, add 0.1mol diethanolamine and 40mL deionized water to the four-necked flask, under nitrogen protection, stir and heat up to 55 ° C, add 0.1mol allyl glycidyl ether dropwise, control the rate of addition of 1 drop / second, add dropwise After the end, the reaction was incubated for 2h, and after the reaction was finished, the deionized water was removed by rotary evaporation to obtain an intermediate product;

[0033] Step B2, mixing 0.05mol 4-aminomethylbenzoic acid, 10.2g intermediate product, 120mL DMF and 5mL toluene, adding p-toluenesulfonic acid, stirring and reacting at a temperature of 110 ° C for 4h, after the reaction is completed, removing DMF by vacuum distillation to obtain For the unsaturated tertiary amino derivative, the amount of p-toluenesulfonic acid used is 2% of the mass sum of 4-aminomethylbenzoic acid and the interm...

Embodiment 2

[0035] The present embodiment provides a kind of unsaturated tertiary amino derivative, which is made by the following steps:

[0036] Step B1, add 0.1mol diethanolamine and 50mL deionized water to the four-necked flask, under nitrogen protection, stir and heat up to 55°C, add 0.11mol allyl glycidyl ether dropwise, control the rate of addition to 3 drops / second, add dropwise After the end, the reaction was incubated for 2h, and after the reaction was finished, the deionized water was removed by rotary evaporation to obtain an intermediate product;

[0037] Step B2, mix 0.05mol 4-aminomethylbenzoic acid, 10.5g intermediate product, 150mL DMF and 8mL toluene, add p-toluenesulfonic acid, stir and react at a temperature of 120 ° C for 6h, after the reaction is completed, remove DMF by vacuum distillation to obtain For the unsaturated tertiary amino derivative, the amount of p-toluenesulfonic acid used is 2% of the mass sum of 4-aminomethylbenzoic acid and the intermediate product. ...

Embodiment 3

[0039] The present embodiment provides a kind of modified silica, which is made by the following steps:

[0040] Step A1, ultrasonically disperse 2 g of mesoporous silica, 10 mL of deionized water and 40 mL of anhydrous ethanol, add 4 mL of 3-aminopropyltriethoxysilane, stir and react at 60°C for 6 hours, after the reaction, centrifuge and precipitate After washing three times with deionized water, vacuum drying to obtain aminated mesoporous silica;

[0041] Step A2: Add 40 mg of aminated mesoporous silica, 1.8 mg of polyvinylpyrrolidone, 20 mL of methanol and 10 mL of silver nitrate solution into the round-bottomed flask, stir for 6 h in the dark, add dropwise 40-50 mL of sodium borohydride solution, and stir to react After 30min, centrifuge, the precipitate is washed with absolute ethanol and deionized water, respectively, and freeze-dried to obtain silver-loaded silica, the concentration of silver nitrate solution is 4mmol / L, and the concentration of sodium borohydride solu...

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Abstract

Belonging to the technical field of aluminum foil preparation, the invention relates to a super hydrophilic antibacterial aluminum foil, which is prepared by the following steps: cleaning an aluminum sheet, removing an oxide layer, placing in a hexamethylenetetramine solution, reacting at 180 DEG C for 1.5 h, taking out, and respectively drying at 60 DEG C, 100 DEG C, 200 DEG C, 300 DEG C and 400 DEG C for 1 h to obtain a base material; 2, preparing the following raw materials in parts by weight: 25-30 parts of methoxy polyethylene glycol acrylate, 30-50 parts of a waterborne polyurethane acrylate oligomer, 6-12 parts of ethoxylated trimethylolpropane triacrylate, 5-8 parts of modified silicon dioxide and 2-3 parts of a photoinitiator, mixing the raw materials in the step 2, and adding water for dilution to prepare a resin solution with the mass fraction of 1%; the resin solution is coated on the surface of a base material and cured to obtain the super-hydrophilic antibacterial aluminum foil, the initial water contact angle of the super-hydrophilic antibacterial aluminum foil is less than 5 degrees, the adhesion grade is 0 grade, and the super-hydrophilic antibacterial aluminum foil has high lasting hydrophilicity and antibacterial performance.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil preparation, and in particular relates to a super-hydrophilic antibacterial aluminum foil. Background technique [0002] The aluminum foil fins used for heat exchangers have the conversion of heat dissipation and heat absorption during operation. Usually, the surface temperature of the fins is lower than the dew point temperature of the air, so the moisture in the air is easy to condense on the surface of the fins. . When the air conditioner is refrigerating, the indoor heat exchanger absorbs heat, and the condensed water diffuses on the surface of the heat sink or appears in the form of water droplets, resulting in the formation of water bridges between the fins, blocking the air circulation, increasing wind resistance and noise, and reducing heat exchange efficiency; When it is hot, the condensed water of the outdoor heat exchanger adheres to the surface of the heat dissipation fins in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D3/10B05D3/06C09D175/14C09D171/02C09D5/14C09D7/62
CPCB05D7/14B05D3/067B05D3/102C09D175/14C09D5/14C09D7/62C08K2003/0806B05D2202/25B05D2350/35B05D2502/00B05D2301/00C08L71/02C08K9/04C08K3/36C08K9/12C08K3/08
Inventor 江孝星曹小军章江盛淑斌张永强
Owner HUANGSHAN TIANMA ALUMINUM
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