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A "two-step method" preparation method of lubricious and durable silicone anti-icing coating

A lubricity and anti-icing technology, applied in the direction of coating, etc., to achieve low ice shear strength, excellent wear resistance, and improved wear resistance

Inactive Publication Date: 2020-05-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • A "two-step method" preparation method of lubricious and durable silicone anti-icing coating
  • A "two-step method" preparation method of lubricious and durable silicone anti-icing coating
  • A "two-step method" preparation method of lubricious and durable silicone anti-icing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) Synthesis of PDMS brush-type graft polymer

[0053] 2.0g main chain PDMS-PMHS (molecular weight is 62000) and 3.0g branched chain PDMS-V (molecular weight is 500) and 45.0g tetrahydrofuran are mixed and prepared into the homogeneous reaction solution that solute mass percentage content is 10wt%; Under nitrogen protection Add 120 μL of Karstedt's catalyst (0.001% of reactant mass) in tetrahydrofuran (solution mass fraction: 2.75wt%) to the above system; heat up to 60°C, condense and reflux for 18.8h under stirring; The product was taken out, rotated at 30°C to remove as much solvent as possible, and dried in a vacuum oven for 24 hours to remove residual solvent.

[0054] A PDMS brush-type graft polymer (molecular weight: 70,000) with a grafting degree of 20% was prepared.

[0055] 2) Preparation of lubricious and durable silicone anti-icing coating

[0056] 2.0g of the above-mentioned PDMS brush-type graft polymer (molecular weight is 70000), 3.0g crosslinking agent...

Embodiment 2

[0059] 1) Synthesis of PDMS brush-type graft polymer

[0060] 8.5g main chain PDMS-PMHS (molecular weight is 8000) and 6.5g branched chain PDMS-V (molecular weight is 3750) is mixed with 35.0g toluene and is formulated into the homogeneous reaction solution that solute mass percentage content is 30wt%; Under nitrogen protection Add 80 μL of Karstedt's catalyst (0.001% of reactant mass) in toluene solution (solution mass fraction is 5.0wt%) to the above system; heat up to 75°C, condense and reflux for 34h under stirring; after the reaction, the crude product Take it out, rotate it at 55°C to remove as much solvent as possible, and dry it in a vacuum oven for 48 hours to remove the residual solvent.

[0061] A PDMS brush-type graft polymer (molecular weight: 104,000) with a grafting degree of 50% was prepared.

[0062] 2) Preparation of lubricious and durable silicone anti-icing coating

[0063] 6.0g of the above-mentioned PDMS brush-type graft polymer (molecular weight is 104...

Embodiment 3

[0066] 1) Synthesis of PDMS brush-type graft polymer

[0067] 3.0g main chain PDMS-PMHS (molecular weight is 120000) and 2.0g branched chain PDMS-V (molecular weight is 7000) are mixed with 5.0g dichloromethane and are formulated into the homogeneous reaction solution that solute mass percentage content is 50wt%; Add 65 μL of Karstedt's catalyst (0.001% of reactant mass) in dichloromethane solution (solution mass fraction: 5.0 wt%) to the above system under protection; heat up to 90°C, condense and reflux for 10 h under stirring; the reaction ends Finally, the crude product was taken out, rotary evaporated at 30° C. to remove as much solvent as possible, and dried in a vacuum oven for 24 hours to remove residual solvent.

[0068] A PDMS brush-type graft polymer (molecular weight: 200,000) with a grafting degree of 33.3% was obtained.

[0069] 2) Preparation of lubricious and durable silicone anti-icing coating

[0070] 9.5g of the above-mentioned PDMS brush-type graft polyme...

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Abstract

The invention discloses a preparation method for a durable organosilicon anti-icing coating with lubricity through a two-step process. The two-step process comprises the following two steps: step 1, formation of a brush-type graft polymer through a reaction of hydrogen-containing polydimethylsiloxane and vinyl single-terminal polydimethylsiloxane; and step 2, preparation of a uniform reaction solution with the brush-type graft polymer as a main raw material, vinyl double-terminal polydimethylsiloxane as a crosslinking agent and polydimethylsiloxane without participation in a crosslinking reaction as an additive, and preparation of the durable organosilicon anti-icing coating with lubricity under the action of a Karstedt't catalyst. The durable organosilicon anti-icing coating with lubricity prepared by using the above-mentioned two-step process provided by the invention has ultra-low ice shear strength and excellent wear resistance, wherein the lowest ice shear strength is 2.4 kPa. Thepreparation method provided by the invention is simple and convenient and has easily-available materials; and the anti-icing coating prepared by using the preparation method provided by the inventionhas good transparency and is applied in the field of hydrophobic and anti-icing coatings.

Description

technical field [0001] The invention relates to a preparation method of a "two-step method" lubricating and durable silicone anti-icing coating, which belongs to the field of organic silicon coating preparation and application of hydrophobic and anti-icing coating materials. Background technique [0002] In the fields of aerospace, transportation, electric power communication, etc., the icing on the surface of the substrate has brought serious economic losses and major harm to human beings and society. Although traditional active deicing methods, such as mechanical deicing, heating deicing, spraying antifreeze, etc., have been widely used, the disadvantages of high consumption, low efficiency, and environmental pollution also restrict their application in the field of anti-icing. The method for constructing an anti-icing and ice-phobic functional coating on the surface of a substrate has low cost, simple application and implementation, and has greater development and applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/10C09D183/07C09D7/65C08G77/44
CPCC08G77/44C08L2205/025C08L2205/03C09D7/65C09D183/10C08L83/04
Inventor 袁晓燕高淑辉刘波彭杰李晓晖朱孔营
Owner TIANJIN UNIV
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