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Patterning polysiloxane anti-icing coating and preparation method thereof

A technology of polysiloxane and polysilsesquioxane, applied in the direction of coating, etc., to achieve good mechanical stability, easy operation, and excellent anti-icing performance

Inactive Publication Date: 2019-07-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention combines the soft elasticity of branched PDMS and the hydrophobic enhancement function of fluorinated POSS, and uses the breathing pattern method to regulate the temperature and humidity in the surface drying process, and the patterned anti-icing coating prepared has excellent anti-icing properties performance and excellent mechanical stability, the ice shear strength of the obtained anti-icing coating can be as low as 15kPa, and the abrasion resistance can be as high as 2500 times, and this work has not been reported before

Method used

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  • Patterning polysiloxane anti-icing coating and preparation method thereof
  • Patterning polysiloxane anti-icing coating and preparation method thereof
  • Patterning polysiloxane anti-icing coating and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0041]Preparation of patterned polysiloxane anti-icing coatings. Get 2g of branched polydimethylsiloxane, 0g of fluorinated polyhedral oligomeric silsesquioxane (the number of silicon-hydrogen bond is 1), 4g of double-terminal hydrogen polydimethylsiloxane (molecular weight 20000) and 7 μL of Karstedt's catalyst were uniformly mixed, 14 g of dichloromethane was used as a solvent, and the concentration of the reactant solution was 30 wt%. ×2cm aluminum sheet, after drop coating, place the coating in an environment with a temperature of 15°C and a relative humidity of 45% for 4 hours, and then put it in an oven at 80°C to fully cross-link and cure for 5 hours.

[0042] The ice shear strength of the coating was measured to be 29kPa, and the abrasion resistance was 1000 times.

Embodiment 2

[0044] Preparation of patterned polysiloxane anti-icing coatings. Get 2.5g of branched polydimethylsiloxane, 1g of fluorinated polyhedral oligomeric silsesquioxane (the number of silicon-hydrogen bonds is 3), 7g of double-terminal hydrogen polydimethylsiloxane (molecular weight 500) and 17 μL of chloroplatinic acid catalyst were uniformly mixed, 29.5 g of carbon disulfide was used as a solvent, and the concentration of the reactant solution was 21 wt%. ×2cm aluminum sheet, after drop coating, place the coating in an environment with a temperature of 25°C and a relative humidity of 60% for 2 hours, and then put it in an oven at 120°C to fully cross-link and cure for 2 hours.

[0045] The ice shear strength of the coating was measured to be 30kPa, and the abrasion resistance was 1800 times.

Embodiment 3

[0047] Preparation of patterned polysiloxane anti-icing coatings. Get 4g of branched polydimethylsiloxane, 1.5g of fluorinated polyhedral oligomeric silsesquioxane (the number of silicon-hydrogen bonds is 7), 10g of double-terminal hydrogen polydimethylsiloxane ( Molecular weight is 10000) and Karstedt's catalyst of 13 μ L carry out homogeneous mixing, 34.5g dichloromethane is used as solvent, the concentration of being made into reactant solution is 31wt%, after shaking for 2h, get mixed reaction solution 330 μ L, evenly drip-coat on the processed On a 2cm×2cm aluminum sheet, after drop coating, place the coating in an environment with a temperature of 45°C and a relative humidity of 85% for 3 hours, and then put it in an oven at 100°C to fully cross-link and cure for 3.5 hours.

[0048] The measured ice shear strength of the coating is 26kPa, and the abrasion resistance is 2200 times.

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Abstract

The invention discloses a patterning polysiloxane anti-icing coating and a preparation method thereof. The method prepares the anti-icing coating with a patterning surface by evenly mixing prepared branched polydimethylsiloxane, fluorinated polyhedral oligomeric silsesquioxane, and double-end hydrogen polydimethylsiloxane, changing the surface drying temperature and humidity of the coating, obtaining the patterning surface according to a breathing pattern method in the high-humidity environment of 45-85% at 15-45 DEG C, thermally crosslinking, and solidifying to form a film. The branched polydimethylsiloxane is 3-10%; the fluorinated polyhedral oligomeric silsesquioxane is 0-5%; the double-end hydrogen polydimethylsiloxane is 10-20%; a catalyst is 0.01-0.12%; and the balance is a solvent.The ice shear strength and the abrasive resistance test are conducted on the patterning fluorinated POSS crosslinked branched polysiloxane anti-icing coating, and the ice shear strength as low as 15 kPa and the abrasion cycle index up to 2500 times are obtained. The preparation method is simple and convenient, the condition is controllable, and the preparation method has a huge application prospect in the anti-icing field.

Description

technical field [0001] The invention belongs to the technical field of anti-icing coating materials, and in particular relates to a patterned polysiloxane anti-icing coating and a preparation method thereof. Background technique [0002] Icing is a common natural phenomenon in cold regions, but the accumulation of ice on the surface of various infrastructures will cause many potential hazards to people's production and life. The active deicing methods currently used in practice have low deicing efficiency, high energy consumption, Disadvantages such as polluting the environment. Anti-icing coatings that can achieve passive deicing effects are not only time-saving and labor-saving, but also less harmful to the environment, and are currently a research hotspot. Low surface energy elastomer materials are currently one of the general anti-icing strategies, and silicone materials are low surface energy elastomer materials widely used in the field of anti-icing. The low surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/05C09D183/04C09D183/08
CPCC08L2205/025C08L2205/03C09D183/04C08L83/04C08L83/08
Inventor 袁晓燕彭杰朱孔营高淑辉赵蕴慧李晓晖
Owner TIANJIN UNIV
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