Preparation method of nano SiO2 modified epoxy resin super-hydrophobic coating material

A super-hydrophobic coating, epoxy resin technology, applied in epoxy resin coatings, coatings and other directions, can solve problems such as limiting the use of epoxy resin coatings

Inactive Publication Date: 2020-03-27
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Epoxy resin also has disadvantages in the preparation of high-temperature curing epoxy solvent-based coatings. High temperature inevitably produces a large number of micropores when the solvent evaporates, which greatly limits the use of epoxy resin coatings, but by adding nanoparticles This situation can be effectively changed (Yu Ma, Haihui Di .et al.Fabrication of silica-decorated graphene oxide nanohybrids and the properties of compositeepoxy coatings research.Applied Surface Science 360(2016)936-945.)

Method used

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  • Preparation method of nano SiO2 modified epoxy resin super-hydrophobic coating material
  • Preparation method of nano SiO2 modified epoxy resin super-hydrophobic coating material
  • Preparation method of nano SiO2 modified epoxy resin super-hydrophobic coating material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Weigh 2.0121g of EP CYD-127 epoxy resin, then add 1.73g of trimethoxy (1H,1H,2H,2H-heptadecafluorodecyl) silane dropwise, and then add the prepared absolute ethanol: water 20ml of ethanol aqueous solution with a volume ratio of 9:1, ultrasonically dispersed for 20 minutes, condensed and refluxed in an oil bath at 65°C for 5 hours. Then, the modified epoxy resin solution that has been reacted is evaporated to dryness with a rotary evaporator, and finally centrifuged to obtain the modified epoxy resin;

[0026] Weigh 5.66g of diethylenetriamine, 1.5g of sodium ethoxide, and 50ml of absolute ethanol. First, ultrasonically disperse for 15 minutes, then stir in an oil bath under nitrogen protection for 1 hour, set the temperature to 70°C, and then add 11g of methyl Tridecafluorooctyl acrylate continued to react for 23 hours, the crude product was rotary evaporated to remove the solvent, added deionized water to wash until neutral, and then filtered to obtain a modified curin...

Embodiment 2

[0029] Weigh 3 g of EP CYD-127 type epoxy resin, then add 1.23 g of trimethoxy (1H, 1H, 2H, 2H-heptadecafluorodecyl) silane dropwise, and then add the prepared absolute ethanol: water 20ml of ethanol aqueous solution with a volume ratio of 9:1, ultrasonically dispersed for 20 minutes, condensed and refluxed in an oil bath at 65°C for 5 hours. Then, the modified epoxy resin solution that has been reacted is evaporated to dryness with a rotary evaporator, and finally centrifuged to obtain the modified epoxy resin;

[0030] Weigh 5.66g of diethylenetriamine, 1.5g of sodium ethoxide, and 50ml of absolute ethanol. First, ultrasonically disperse for 15 minutes, then stir in an oil bath under nitrogen protection for 1 hour, set the temperature to 70°C, and then add 11g of methyl Tridecafluorooctyl acrylate continued to react for 23 hours, the crude product was rotary evaporated to remove the solvent, added deionized water to wash until neutral, and then filtered to obtain a modified ...

Embodiment 3

[0035] Weigh 1.9818g of EP CYD-127 type epoxy resin, then add 0.5356g of trimethoxy (1H,1H,2H,2H-heptadecafluorodecyl) silane dropwise, and then add the prepared absolute ethanol: water 20ml of ethanol aqueous solution with a volume ratio of 9:1, ultrasonically dispersed for 20 minutes, condensed and refluxed in an oil bath at 65°C for 5 hours. Then, the modified epoxy resin solution that has been reacted is evaporated to dryness with a rotary evaporator, and finally centrifuged to obtain the modified epoxy resin;

[0036] Weigh 5.66g of diethylenetriamine, 1.5g of sodium ethoxide, and 50ml of absolute ethanol. First, ultrasonically disperse for 15 minutes, then stir in an oil bath under nitrogen protection for 1 hour, set the temperature to 70°C, and then add 11g of methyl Tridecafluorooctyl acrylate continued to react for 23 hours, the crude product was rotary evaporated to remove the solvent, added deionized water to wash until neutral, and then filtered to obtain a modifie...

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Abstract

The invention discloses a preparation method of a nano SiO2 / modified epoxy resin super-hydrophobic coating material. The method comprises the following steps: (1) firstly, respectively modifying epoxyresin and SiO2 nanoparticles by using a silane coupling agent to obtain fluorinated epoxy resin and fluorinated nano SiO2; (2) grafting diethylenetriamine with tridecafluorooctyl methacrylate to obtain a modified curing agent; and (3) mixing the modified epoxy resin, the modified nanoparticles and the modified curing agent according to a certain ratio to obtain the coating material with super-hydrophobic performance, and the static water contact angle of the coating material reaches up to 150.5 degrees. The modified nano SiO2 / modified epoxy resin coating material prepared in the invention hasgood freezing resistance and corrosion resistance. The coating material is prepared by a three-step method, is simple to operate, quick in reaction and very high in efficiency, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of polymer composite materials and relates to a nano-SiO 2 The preparation method of modified epoxy resin superhydrophobic coating material. Background technique [0002] Epoxy resin coating is a high-strength, wear-resistant, beautiful and widely used coating. It is non-polluting, has good hydrophobicity, does not require a primer coating film, has excellent mechanical and mechanical properties, and has good stability, corrosion resistance, chemical resistance, and easy storage. This kind of organic polymer materials can play a greater application value in harsh chemical processes, vehicle engineering, wind power blades and other fields (Genzer, J. & Efmenko, K. Recent developments in superhydrophobic surfaces and their relevance to marinefouling: a review. Biofouling 22, 339–360 (2006).). [0003] Epoxy resins are widely used for their excellent chemical properties, electrical insulation properties, and corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/62C08G59/14C08G59/50
CPCC08G59/1438C08G59/502C08K2201/011C09D163/00C09D7/62C08K9/06C08K3/36
Inventor 欧宝立汪雨微邢赟鲁忆罗子盈
Owner HUNAN UNIV OF SCI & TECH
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