Preparation method of self-cleaning anti-icing coating based on brush-shaped organic silicon

A self-cleaning, silicone technology, applied in the field of materials science, can solve the problems of insufficient mechanical properties and short durability, and achieve the effect of good low surface energy performance, short production cycle, and superior self-cleaning and antifouling performance

Active Publication Date: 2021-03-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PDMS alone still has problems such as insufficient mechanical properties and short durability.

Method used

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  • Preparation method of self-cleaning anti-icing coating based on brush-shaped organic silicon
  • Preparation method of self-cleaning anti-icing coating based on brush-shaped organic silicon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Under the protection of nitrogen, 5.0ml of dioxane, 0.10mmol of acrylamide thiolactone, 0.10mmol of 3-mercapto-1-propanol and 0.50mL of triethylamine were added to the reaction vessel, and the mercapto-ene addition was carried out at room temperature. After 1 hour, the modified thiolactone was obtained; 0.05 mmol of diamine and 0.10 mmol of siloxane were added to the above reaction vessel in sequence, and the amine group nucleophilic ring-opening reaction and sulfhydryl click reaction of the thiolactone were carried out in sequence. After reacting for 6 hours, the siloxane block was obtained; under nitrogen protection, PTMEG 12mmol, IPDI 6mmol, DBTDL 50μL and BDO 6mmol (dissolved in 5mL DOX) were successively added to the reaction vessel and reacted at 60°C for 4h to obtain the resin matrix; Take 1g of the above resin matrix and dissolve it in 3mL DOX to prepare a solution with a concentration of 25%, spread it on the substrate by the salivation method, place it in a bla...

Embodiment 2

[0036]Under the protection of nitrogen, 5.0ml of dioxane, 0.20mmol of acrylamide thiolactone, 0.20mmol of 3-mercapto-1-propanol and 1.0mL of triethylamine were added to the reaction vessel, and the mercapto-ene addition was carried out at room temperature. After 3 hours, the modified thiolactone was obtained; 0.10 mmol of diamine and 0.20 mmol of siloxane were added to the above reaction vessel, and the amine group nucleophilic ring-opening reaction and sulfhydryl click reaction of the thiolactone were sequentially carried out. , the siloxane block was obtained after 18 hours of reaction; under nitrogen protection, PTMEG 8.0mmmol, IPDI 2.0mmol, DBTDL 150μL and BDO 6.0mmol (dissolved in 5mL DOX) were successively added to the reaction vessel and reacted for 6 hours at 80°C to obtain Resin matrix: Dissolve 1g of the above resin matrix in 4mL DOX to prepare a solution with a concentration of 20%, spread it on the substrate by the salivation method, place it in a blast oven, and he...

Embodiment 3

[0040] Under the protection of nitrogen, 5.0ml of dioxane, 0.10mmol of acrylamide thiolactone, 0.10mmol of 3-mercapto-1-propanol and 0.50mL of triethylamine were added to the reaction vessel, and the mercapto-ene addition was carried out at room temperature. After 1 hour, the modified thiolactone was obtained; 0.05 mmol of diamine and 0.10 mmol of siloxane were added to the above reaction vessel in sequence, and the amine group nucleophilic ring-opening reaction and sulfhydryl click reaction of the thiolactone were carried out in sequence. After reacting for 6 hours, the siloxane block was obtained; under the protection of nitrogen, sequentially add PTMEG 16mmmol, IPDI 4mmol, DBTDL 50μL and BDO 12mmol (dissolved in 5mLDOX) in the reaction vessel and react at 70°C for 10h to obtain the resin matrix; Take 1g of the resin matrix and dissolve it in 2mL DOX to prepare a solution with a concentration of 33%, spread it on the substrate by the salivation method, place it in a blast ove...

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Abstract

The invention relates to a preparation method of a self-cleaning anti-icing coating based on brush-shaped organic silicon. The preparation method comprises the following steps of: carrying out simplemulti-component click reaction on thiolactone, a diamine compound and monovinyl-terminated polydimethylsiloxane to prepare a dihydroxyl-terminated block, and introducing the dihydroxyl-terminated block into a polyurethane matrix to obtain a brush-shaped organic silicon modified polyurethane coating. The coating with the special structure has the characteristics of low surface energy of organic silicon and strong adhesion between the polyurethane coating and a substrate, and the special brush-shaped structure endows the coating with a special liquid-like surface structure, so that the coating has excellent self-cleaning and anti-fouling properties. The highest tensile strength of the coating can reach 48.62 MPa, the elongation at break of the coating is 1233%, the static water contact angleof the coating is 95 degrees or above, and the minimum ice adhesion force of the surface of the coating can reach 15.4 kPa.

Description

technical field [0001] The invention belongs to the field of materials science and relates to a method for preparing a coating material, in particular to a method for preparing a self-cleaning anti-icing coating based on brush-shaped organic silicon. Background technique [0002] Icing and frosting is a very common natural phenomenon, but it brings safety hazards to people's aviation, marine, electric power, automobile and energy industries. For example, icing on the surface of an aircraft may reduce the safety performance of the aircraft such as maneuverability and stability, threatening flight safety. According to statistics, the probability of air accidents due to icing exceeds 15%. The structural corrosion and icing problems of the J-8 and Su-27 aircraft have seriously affected the combat readiness of the aircraft. In addition, the icing of transmission lines, especially high-voltage transmission lines, may also cause a series of serious economic losses. For example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/16C09K3/18C08G18/66C08G18/61C08G18/48C08G18/32C08G18/75C08G18/65
CPCC09D175/04C09D5/1662C09K3/18C08G18/6674C08G18/61C08G18/4854C08G18/755C08G18/6511C08G18/246C08G18/3206C08G18/63C08G18/4072C09D175/08C09D5/1675B29C41/003B29C41/46B29K2075/00C09D5/00
Inventor 张秋禹田艺张和鹏张宝亮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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