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Ultraviolet cured organic/inorganic hybrid super-hydrophilic coating and method for preparing same

An ultraviolet light and super-hydrophilic technology, applied in the field of super-hydrophilic materials, can solve problems such as intolerance to harsh conditions and poor mechanical properties, and achieve high production efficiency, good acid resistance and boiling water resistance, and simple process effects

Inactive Publication Date: 2017-03-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the disadvantages of poor mechanical properties and intolerance to harsh liquids existing in the current super-hydrophilic coating, and provides an organic / inorganic hybrid super-hydrophilic coating with simple preparation process, excellent mechanical properties, acid resistance and boiling water resistance and its Preparation

Method used

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  • Ultraviolet cured organic/inorganic hybrid super-hydrophilic coating and method for preparing same
  • Ultraviolet cured organic/inorganic hybrid super-hydrophilic coating and method for preparing same
  • Ultraviolet cured organic/inorganic hybrid super-hydrophilic coating and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0029] At room temperature, disperse 0.6g of 1,4‐dithiothreitol in 6g of tetrahydrofuran solvent and stir evenly, then add 3g of polyethylene glycol dimethacrylate (Mn=550) into the above solution , and then add 0.03g of triethylamine, react under nitrogen for 24h, add the product to ether and wash three times, and place the separated substance in a vacuum oven at 50°C for 12h to obtain a hydrophilic oligomer.

[0030] At room temperature, 0.4 g of mesoporous silica (Nanjing Xianfeng Nano Material Technology Co., Ltd.) with a particle size of 40 nm and a pore size of 2 nm was added to 4 g of methanol solvent, ultrasonically dispersed for 15 min, and 0.6 g of hydrophilic oligomers and mix evenly; then add 0.08g of pentaerythritol triacrylate and 0.02g of 2-hydroxy-2-methyl-1-phenyl-1-acetone (1173), stir and mix to form a uniform solution, using spray The method is to uniformly coat it on the glass surface, and the radiation intensity is 30mW / cm 2 UV light was irradiated for 6...

Embodiment 2

[0037] At room temperature, disperse 0.8g of 1,3-propanedithiol in 6g of tetrahydrofuran solvent and stir evenly, then add 1.8g of neopentyl glycol diacrylate to the above solution, and then add 0.09g of n- Butylamine was reacted under nitrogen for 8 hours, the product was added to ether and washed three times, and the separated substance was placed in a vacuum oven at 30°C for 36 hours to obtain a hydrophilic oligomer.

[0038] At room temperature, add 1.2 g of mesoporous silica with a particle size of 100 nm and a pore size of 10 nm into 4 g of methanol solvent, ultrasonically disperse for 15 min, then add 1.2 g of the oligomer prepared above, and mix well; Add 0.8g of pentaerythritol tetraacrylate and 0.06g of 1‐hydroxycyclohexyl phenyl ketone (184), stir and mix to form a homogeneous solution, which is evenly coated on the surface of the stainless steel sheet by spraying (in order to make the stainless steel The iron sheet will not be corroded during the acid resistance te...

Embodiment 3

[0041] At room temperature, disperse 0.85g of 1,6-hexanedithiol in 6g of tetrahydrofuran solvent and stir evenly, then add 1.3g of 1,5-pentanediol diacrylate to the above solution, and then add 0.05 g of N,N-dimethylcyclohexylamine, reacted under nitrogen for 24 hours, added the product to ether and washed three times, and placed the separated substance in a vacuum oven at 35°C for 24 hours to obtain a hydrophilic oligomer.

[0042] At room temperature, 0.75 g of mesoporous silica with a particle size of 60 nm and a pore size of 5 nm was added to 4 g of methanol solvent, ultrasonically dispersed for 15 min, and then 1.1 g of the above-prepared hydrophilic oligomer was added, and Mix well; add 0.08 g of trimethylolpropane trimethacrylate and 0.05 g of 2‐methyl‐1‐(4‐methylthiophenyl)‐2‐morpholine‐1‐acetone (907) , stirred and mixed to form a uniform solution, which was evenly coated on the surface of the ceramic sheet by spraying (in order to prevent the ceramic sheet from being...

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Abstract

The invention discloses an ultraviolet cured organic / inorganic hybrid super-hydrophilic coating and a method for preparing the same. The method includes carrying out sulfhydryl-alkene reaction on mercaptan compounds and acrylic ester compounds under the catalytic effects of amine catalysts to prepare hydrophilic oligomers; uniformly mixing the hydrophilic oligomers, mesoporous silicon dioxide, cross-linking agents and photoinitiators in methanol with one another to obtain solution; spraying the uniformly mixed solution on the surfaces of base materials and forming the organic / inorganic hybrid super-hydrophilic coating on the surfaces of the base materials by means of ultraviolet curing. Two ends of each mercaptan compound carry sulfhydryl, each of two ends of each acrylic ester compound carry C=C double bonds, and each of two ends of each hydrophilic oligomer carry C=C double bonds. The ultraviolet cured organic / inorganic hybrid super-hydrophilic coating and the method have the advantages that the method includes simple processes, water contact angles of the organic / inorganic hybrid super-hydrophilic coating prepared by the aid of the method can be reduced and are smaller than 5 degrees in 0.24 s, and the ultraviolet cured organic / inorganic hybrid super-hydrophilic coating is excellent in acid resistance, boiling water resistance and mechanical property.

Description

technical field [0001] The invention relates to a superhydrophilic material, in particular to an ultraviolet-cured organic / inorganic hybrid superhydrophilic coating and a preparation method thereof. Background technique [0002] Due to the strong interaction force with water, the super-hydrophilic surface can completely spread the water droplets in a short period of time to form a very thin water film. Generally, a coating that reduces the water contact angle to less than 5° within 0.5s is called a superhydrophilic coating, which has been widely used in the fields of self-cleaning, anti-fog, anti-fouling, oil-water separation, etc. , microfluidic control, immobilization of biomolecules, rainwater storage and drag reduction, etc. also show potential application prospects. [0003] At present, there are roughly two ways to prepare superhydrophilic coatings. One is to prepare a photocatalytic active material (such as TiO 2 , ZnO, SnO 2 、WO 3 , V 2 o 5 etc.), and then unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/02C09D4/02C09D7/12
CPCC08K3/36C08K2201/003C08K2201/011C09D4/00C09D171/02C09D7/61
Inventor 李红强梁涛曾幸荣赖学军苏晓竞张林
Owner SOUTH CHINA UNIV OF TECH
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