Nano-silica modified silicon resin super-hydrophobic coating, and preparation method and application thereof

Abstract

The invention provides a nano-silica modified silicon resin super-hydrophobic coating, and a preparation method and an application thereof. The nano-silica modified silicon resin super-hydrophobic coating is formed by grafting the surface of a nano-silica particle with a hydrophobic functional group molecule having low surface energy and high stability and then crosslinking with silicon resin. Theformed nano-silica modified silicon resin super-hydrophobic coating has low surface energy and a super-hydrophobic surface of a micro-nano binary coarse structure, and the static contact angle of thecoating is 159.6-161.8 DEG C. The super-hydrophobic coating provided by the invention has the advantages of high stability and high hydrophobicity; and the preparation method is simple and easy to implement, the hydrophobic coating is applied to live working tools and instruments, the safety of distribution network live working under the high-humidity condition can be improved, the application range of distribution network live working is expanded, and the operation safety and power supply reliability of a distribution network are improved.

Description

technical field

[0001] The invention relates to the technical field of hydrophobic materials, in particular to a nano-silica modified silicone resin superhydrophobic coating, a preparation method and application thereof. Background technique

[0002] Most of the imported resin protective masking products do not meet the requirements of international IEC and my country's national and electric power industry standards. The fatal defect of the resin insulation blankets imported today is poor moisture resistance. Once the weather is wet or suddenly encounters light rain or the workers sweat and the insulation of the insulation blanket is damp, its insulation performance will be greatly reduced or even broken down. On-site live working leaves potential safety hazards. Existing soft insulating tools are easily damp under normal conditions or damp during transportation and use, resulting in inability to work midway and must be dried in an oven before continuing to use; , when it ...

Examples

Embodiment 1

[0025]Weigh 400mL of absolute ethanol and 30mL of tetraethyl orthosilicate solution, pour the mixture of tetraethyl orthosilicate and absolute ethanol into a three-necked electric stirring bottle with a capacity of 1000mL, and configure the volume ratio of distilled water and ammonia water to be 2 :7 mixed solution. 20 mL of distilled aqueous ammonia solution was dropped into a three-neck flask at a rate of 10 mL / min, and the reaction temperature and stirring speed were controlled to uniformly stir the mixed solution for 24 hours to obtain a nano-silica dispersion. The nano-silica was separated from the solvent by centrifugation, the solvent and by-products were removed, and after washing with ethanol three times, vacuum-dried at 120° C. for 12 h to obtain dried nano-silica particles.

[0026] Disperse 3 g of nano-silica particles and 5 g of tridecafluorooctyl triethoxy silicon in 40 g of ethanol solution, add to an electric stirring three-neck flask, and mix thoroughly at roo...

Embodiment 2

[0029] Weigh 200mL of absolute ethanol and 10mL of tetraethyl orthosilicate solution, pour the mixture of tetraethyl orthosilicate and absolute ethanol into a three-necked electric stirring bottle with a capacity of 1000mL, and configure the volume ratio of distilled water and ammonia water to be 2 :5 mixed solution. 10 mL of distilled aqueous ammonia solution was dropped into a three-neck flask at a rate of 10 mL / min, and the reaction temperature and stirring speed were controlled to uniformly stir the mixed solution for 24 hours to obtain a nano-silica dispersion. The nano-silica was separated from the solvent by centrifugation, the solvent and by-products were removed, and after washing with ethanol three times, vacuum-dried at 120° C. for 12 h to obtain dried nano-silica particles.

[0030] Disperse 2g of nano-silica particles and 4g of heptadecafluorodecyltriethoxysilane in 30g of ethanol solution, add to a three-neck flask with electric stirring, and mix thoroughly at ro...

Embodiment 3

[0033] Weigh 500mL of absolute ethanol and 40mL of tetraethyl orthosilicate solution, pour the mixture of tetraethyl orthosilicate and absolute ethanol into a three-neck electric stirring bottle with a capacity of 1000m L, and configure the volume ratio of distilled water and ammonia water to be 2 :5 mixed solution. 25 mL of distilled aqueous ammonia solution was dropped into a three-neck flask at a rate of 10 mL / min, and the reaction temperature and stirring speed were controlled to uniformly stir the mixed solution for 24 hours to obtain a nano-silica dispersion. The nano-silica was separated from the solvent by centrifugation, the solvent and by-products were removed, and after washing with ethanol three times, vacuum-dried at 120° C. for 12 h to obtain dried nano-silica particles.

[0034] Disperse 4g of nano-silica particles and 6g of tridecafluorooctyltriethoxysilicon in 50g of ethanol solution, add into a three-neck flask with electric stirring, and mix thoroughly at ro...

technical field

[0001] The invention relates to the technical field of hydrophobic materials, in particular to a nano-silica modified silicone resin superhydrophobic coating, a preparation method and application thereof. Background technique

[0002] Most of the imported resin protective masking products do not meet the requirements of international IEC and my country's national and electric power industry standards. The fatal defect of the resin insulation blankets imported today is poor moisture resistance. Once the weather is wet or suddenly encounters light rain or the workers sweat and the insulation of the insulation blanket is damp, its insulation performance will be greatly reduced or even broken down. On-site live working leaves potential safety hazards. Existing soft insulating tools are easily damp under normal conditions or damp during transportation and use, resulting in inability to work midway and must be dried in an oven before continuing to use; , when it ...

Examples

Embodiment 1

[0025]Weigh 400mL of absolute ethanol and 30mL of tetraethyl orthosilicate solution, pour the mixture of tetraethyl orthosilicate and absolute ethanol into a three-necked electric stirring bottle with a capacity of 1000mL, and configure the volume ratio of distilled water and ammonia water to be 2 :7 mixed solution. 20 mL of distilled aqueous ammonia solution was dropped into a three-neck flask at a rate of 10 mL / min, and the reaction temperature and stirring speed were controlled to uniformly stir the mixed solution for 24 hours to obtain a nano-silica dispersion. The nano-silica was separated from the solvent by centrifugation, the solvent and by-products were removed, and after washing with ethanol three times, vacuum-dried at 120° C. for 12 h to obtain dried nano-silica particles.

[0026] Disperse 3 g of nano-silica particles and 5 g of tridecafluorooctyl triethoxy silicon in 40 g of ethanol solution, add to an electric stirring three-neck flask, and mix thoroughly at roo...

Embodiment 2

[0029] Weigh 200mL of absolute ethanol and 10mL of tetraethyl orthosilicate solution, pour the mixture of tetraethyl orthosilicate and absolute ethanol into a three-necked electric stirring bottle with a capacity of 1000mL, and configure the volume ratio of distilled water and ammonia water to be 2 :5 mixed solution. 10 mL of distilled aqueous ammonia solution was dropped into a three-neck flask at a rate of 10 mL / min, and the reaction temperature and stirring speed were controlled to uniformly stir the mixed solution for 24 hours to obtain a nano-silica dispersion. The nano-silica was separated from the solvent by centrifugation, the solvent and by-products were removed, and after washing with ethanol three times, vacuum-dried at 120° C. for 12 h to obtain dried nano-silica particles.

[0030] Disperse 2g of nano-silica particles and 4g of heptadecafluorodecyltriethoxysilane in 30g of ethanol solution, add to a three-neck flask with electric stirring, and mix thoroughly at ro...

Embodiment 3

[0033] Weigh 500mL of absolute ethanol and 40mL of tetraethyl orthosilicate solution, pour the mixture of tetraethyl orthosilicate and absolute ethanol into a three-neck electric stirring bottle with a capacity of 1000m L, and configure the volume ratio of distilled water and ammonia water to be 2 :5 mixed solution. 25 mL of distilled aqueous ammonia solution was dropped into a three-neck flask at a rate of 10 mL / min, and the reaction temperature and stirring speed were controlled to uniformly stir the mixed solution for 24 hours to obtain a nano-silica dispersion. The nano-silica was separated from the solvent by centrifugation, the solvent and by-products were removed, and after washing with ethanol three times, vacuum-dried at 120° C. for 12 h to obtain dried nano-silica particles.

[0034] Disperse 4g of nano-silica particles and 6g of tridecafluorooctyltriethoxysilicon in 50g of ethanol solution, add into a three-neck flask with electric stirring, and mix thoroughly at ro...

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