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Fluoropolymer/inorganic nano-hybrid particle modified ultraviolet photocured paint and preparation method thereof

An inorganic nanoparticle and inorganic nanotechnology, applied in the field of coatings, can solve the problems of expensive and complex equipment, not having superhydrophobic and superoleophobic superamphiphobic properties, and not suitable for the preparation of superamphiphobic films.

Inactive Publication Date: 2010-09-08
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent (publication number 1379128) uses chemical deposition to obtain array-structured films, and then treats them with hydrophobic reagents, fluorosilanes and fluoropolymers, to obtain super-amphiphobic films; however, the chemical deposition process requires expensive and complicated equipment. And it is not suitable for the preparation of large-area super-amphiphobic films
German patent ED19921876A1 discloses a self-cleaning organic coating; but its cost is high and expensive
Chinese patents (publication numbers 1654553 and 1908099) use silane or titanate coupling agents to couple and modify nanoparticles, which improves the dispersion of nanoparticles in the UV-curable matrix; The oil performance is very poor, and it does not have the super-amphiphobic properties of super-hydrophobic and super-oleophobic (super-amphiphobic means that the contact angles of water and oil on the surface are greater than 150°)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Surface modification of silica nanoparticles by ATRP method:

[0058] (a) Stir and heat the ethanol dispersion system of 6.0g of silica with a diameter of 30nm to 60℃, directly add ammonia water, adjust the pH to 8.5, stir evenly, and slowly drop 1.2g (5.43mmol) of 3-aminopropyltriethyl Oxysilane, reacted for 24h, washed with acetone three times to obtain silica grafted with coupling agent on the surface, and dried in vacuum at room temperature.

[0059] (b) Put the vacuum-dried silica of the surface graft coupling agent into the reactor, add 40 mL of toluene, add 0.7 g (6.93 mmol) of triethylamine, and slowly drop 1.4 g (with stirring in an ice water bath). 6.48mmol) α-bromopropionyl bromide, reacted at 0°C for 4 hours, washed with acetone three times, and dried under vacuum at room temperature.

[0060] (c) Add the vacuum-dried silicon dioxide grafted with ATRP initiator to the reactor, add 6.0g THF solvent, add 8.4g (54.5mmol) trifluoroethyl acrylate monomer and 0.16g ...

Embodiment 2

[0063] (1) Surface modification of silica nanoparticles by ATRP method:

[0064] (a) Stir and heat 6.0g of a 100nm diameter silica ethanol dispersion system to 60℃, directly add ammonia water, adjust the PH value to 8.5, stir evenly, and slowly drop 1.2g (5.43e) -3 Mol) 3-Aminopropyltriethoxysilane, reacted for 24 hours, washed with acetone three times to obtain silica grafted with coupling agent on the surface, and dried in vacuum at room temperature.

[0065] (b) Same as the first embodiment.

[0066] (c) The same as the first embodiment.

[0067] (2) The same as the first embodiment. The surface contact angle measured by a contact angle tester was 166°.

Embodiment 3

[0069] (2) Surface modification of silica nanoparticles by ATRP method:

[0070] (a) Stir and heat 6.0g of the silica alcohol dispersion system with a diameter of 30nm to 60℃, directly add ammonia water, adjust the PH value to 9.5, stir evenly, and slowly drop 2.4g (10.9mmol) 3-aminopropylethoxy Dimethyl silane, reacted for 48 hours, washed with acetone three times to obtain silica grafted with coupling agent on the surface, and dried in vacuum at room temperature.

[0071] (b) Put the vacuum-dried silica of the graft coupling agent into the reactor, add 40 mL of toluene, add 1.4 g (13.86 mmol) of triethylamine, and slowly drop 2.8 g (12.96) under stirring in an ice water bath. mmol) α-bromopropionyl bromide, reacted at 0°C for 4 hours, washed with acetone three times, and dried under vacuum at room temperature.

[0072] (c) Put the vacuum-dried silica on the surface grafted with ATRP initiator into the reactor, add 12g THF, add 20g (130mmol) trifluoroethyl acrylate monomer and 0.36...

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Abstract

The invention discloses a fluoropolymer / inorganic nano-hybrid particle modified ultraviolet photocured paint and a preparation method thereof. The paint consists of ultraviolet photocured substrate resin added with a fluorine-containing acrylate monomer and an active ingredient which is fluoropolymer / inorganic nano-hybrid particles; the preparation process of the hybrid particles comprises the following steps of: firstly, grafting an ATRP evocating agent or an RAFT chain transfer agent on the surfaces of the inorganic nano-particles; and then, performing surface graft polymerization and modification on the inorganic nano-particles to obtain the fluoropolymer / inorganic nano-hybrid particles. The paint has both super-hydrophobic and super-oleophobic functions; and the contact angle reaches between 153 and 175 degrees.

Description

Technical field [0001] The invention relates to the field of coatings, in particular to a fluoropolymer / inorganic nano hybrid particle modified ultraviolet curing coating and a preparation method thereof. Background technique [0002] Ultraviolet curing coating (UVCC) is an environmentally friendly and energy-saving coating. It will undergo a photochemical reaction after being irradiated by ultraviolet light. This will cause polymerization and cross-linking, and the liquid coating will instantly become a solid coating. It saves energy and is solvent-free. The advantages of emission, environmental protection, fast curing speed, etc., can be used for the coating of heat-sensitive substrates, and are widely used in the coating of metal, glass, plastic, wood, paper and other materials. Because the surface of many materials is easy to adsorb sticky dust, and some require the surface to have both waterproof and oil repellent properties, the development of UVCC with self-cleaning functi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D163/10C09D7/12C08F292/00
Inventor 胡继文何谷平孙建平张干伟
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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