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Lanthanum oxide super-hydrophobic polyurethane coating prepared by adopting spraying method

A polyurethane coating, lanthanum oxide technology, applied in polyurea/polyurethane coatings, devices for coating liquids on surfaces, coatings, etc., can solve problems such as instrument use limitations, micro-nano structure damage, complex methods, etc., and achieve service life. The effect of long, strong hydrophobicity and low preparation environment requirements

Inactive Publication Date: 2021-01-26
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This micro-nano structure is easily damaged by external influences.
Among the many preparation methods, the methods of repairing superhydrophobic surfaces inevitably have problems such as complicated methods and limited use of instruments.

Method used

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  • Lanthanum oxide super-hydrophobic polyurethane coating prepared by adopting spraying method
  • Lanthanum oxide super-hydrophobic polyurethane coating prepared by adopting spraying method
  • Lanthanum oxide super-hydrophobic polyurethane coating prepared by adopting spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of lanthanum oxide superhydrophobic polyurethane coating that adopts spraying method to prepare, comprises the following steps:

[0024] I. the preparation of polyurethane (PU):

[0025] Take 3g of polycarbonate polyol (PCDL: M=2000) and vacuum dehydrate at 70°C for 3h, dissolve in 40g of acetone after dehydration, and mix with 2g of isophorone diisocyanate (IPDI) in 0.1g of dibutyltin dilaurate ( DBTL) catalyzed reaction to obtain polyurethane prepolymer; add 2.5g of perfluorooctyl alcohol to introduce fluorine-containing segment to react for 2h. Get polyurethane emulsion, standby;

[0026] II. Doping of Lanthanum Oxide Nanoparticles:

[0027] Take a certain amount of the above-mentioned polyurethane emulsion, doped with 10% lanthanum oxide nanoparticles, and perform ultrasonic treatment for 30 minutes. During ultrasonication, use ice cubes to control the temperature to avoid side reactions caused by water heating during the ultrasonic process. Polyurethane i...

Embodiment 2

[0031] A kind of lanthanum oxide superhydrophobic polyurethane coating that adopts spraying method to prepare, comprises the following steps:

[0032] I. the preparation of polyurethane (PU):

[0033] Take 5g polycarbonate polyol (PCDL:M=2000) and vacuum dehydrate it at 75°C for 4h, dissolve it in 40g acetone after dehydration, and mix it with 3g isophorone diisocyanate (IPDI) in 0.2g dibutyltin dilaurate ( DBTL) catalyzed reaction to obtain polyurethane prepolymer; add 3g of perfluorooctyl alcohol to introduce fluorine-containing segment and react for 3h. Get polyurethane emulsion, standby;

[0034] II. Doping of Lanthanum Oxide Nanoparticles:

[0035] Take a certain amount of the above-mentioned polyurethane emulsion, doped with 13% lanthanum oxide nanoparticles, and perform ultrasonic treatment for 40 minutes. During ultrasonication, use ice cubes to control the temperature to avoid side reactions caused by water heating during the ultrasonic process. Polyurethane is sto...

Embodiment 3

[0039] A kind of lanthanum oxide superhydrophobic polyurethane coating that adopts spraying method to prepare, comprises the following steps:

[0040] I. the preparation of polyurethane (PU):

[0041] Take 8g of polycarbonate polyol (PCDL: M=2000) and vacuum dehydrate at 80°C for 5h, dissolve in 40g of acetone after dehydration, and mix with 5g of isophorone diisocyanate (IPDI) in 0.3g of dibutyltin dilaurate ( DBTL) catalyzed reaction to obtain polyurethane prepolymer; add 3.5g perfluorooctyl alcohol to introduce fluorine-containing segment reaction for 3h. Get polyurethane emulsion, standby;

[0042] II. Doping of Lanthanum Oxide Nanoparticles:

[0043] Take a certain amount of the above-mentioned polyurethane emulsion, doped with 20% lanthanum oxide nanoparticles, and perform ultrasonic treatment for 50 minutes. During ultrasonication, use ice cubes to control the temperature to avoid side reactions caused by water heating during the ultrasonic process. Polyurethane is s...

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Abstract

The invention discloses a lanthanum oxide super-hydrophobic polyurethane coating prepared by adopting a spraying method, belonging to the technical field of high polymer materials. The preparation method comprises the following steps: (1) preparation of polyurethane: weighing a proper amount of polycarbonate polyol, carrying out vacuum dehydration, then dissolving polycarbonate polyol in acetone,reacting the obtained solution with a proper amount of isophorone diisocyanate under the catalysis of dibutyltin dilaurate to obtain a polyurethane prepolymer, and adding perfluorooctanol into the polyurethane prepolymer to introduce a fluorine-containing chain segment for a reaction; (2) doping of lanthanum oxide nanoparticles: doping 10% of lanthanum oxide nanoparticles into a prepared polyurethane emulsion and carrying out ultrasonic treatment; and (3) filling a small spray bottle with the treated polyurethane which is doped with the lanthanum oxide nanoparticles into, spraying the treatedpolyurethane onto a base material, carrying out gradual heating in a drying oven, and conducting standing to obtain a finished product. The super-hydrophobic polyurethane coating is invented through aspraying method, the preparation method and preparation conditions are simple and convenient, and the prepared lanthanum oxide super-hydrophobic polyurethane coating is easy to repair, high in hydrophobicity, not prone to oxidation and suitable for large-scale application.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a lanthanum oxide superhydrophobic polyurethane coating prepared by a spraying method. Background technique [0002] Polyurethane (PU) coatings have many excellent properties and are widely used in various fields. Superhydrophobic surfaces have been used in self-cleaning, anti-snow and anti-icing, anti-corrosion, microfluidics, chemical shielding, oil-water separation, biomedicine and other fields. More and more superhydrophobic surfaces have been studied for large-scale applications. [0003] General coating polyurethane is not waterproof, it is easy to be oxidized and yellowed after use, it is easy to swell when it absorbs water, and it is not resistant to acid and alkali, resulting in a low service life. [0004] Polyurethane superhydrophobic coating has the characteristics of good elasticity, high elongation, high strength, outstanding wear resistance, acid resista...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C08G18/75C08G18/66C08G18/44C08G18/38C08G18/10B05D5/08
CPCB05D5/083C08G18/10C08G18/44C08G18/755C08K2003/221C08K2201/011C09D175/04C09D7/61C08K3/22C08G18/2885
Inventor 易昌凤杨晓昕秦子振周靖翔
Owner HUBEI UNIV