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Uvioresistant paint with self-repairing function and preparation method and application thereof

An anti-ultraviolet, self-healing technology, applied in the direction of radiation-absorbing coatings, coatings, etc., can solve the problems of easy loss of ultraviolet absorbers and the lack of self-healing properties of coatings

Inactive Publication Date: 2017-04-26
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the ultraviolet absorber in the current anti-ultraviolet coating is easy to lose and the coating does not have self-healing performance, the present invention proposes an anti-ultraviolet coating with self-healing function and its preparation method, and successfully applies the coating to protect base material

Method used

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  • Uvioresistant paint with self-repairing function and preparation method and application thereof
  • Uvioresistant paint with self-repairing function and preparation method and application thereof
  • Uvioresistant paint with self-repairing function and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Preparation of the main body of the ultraviolet absorber: ultrasonically disperse 1g of titanium dioxide in 500mL of β-cyclodextrin (β-CD) aqueous solution (20g / L), react and irradiate it under a UV lamp (36W, λ=254nm) for 48h, and then centrifuge Remove the unreacted titanium dioxide particles, wash with water for 3 times and then freeze-dry to obtain T-CD, the main body of ultraviolet absorber modified with cyclodextrin;

[0033] Preparation of guest materials: Dissolve hydroxyethylmethacrylate (HEMA) (15mmol) and tripropylamine (23mmol) in 200mL of anhydrous dichloromethane (0-5°C), then add 3.7g of adamantane methyl The dichloromethane solution of acid chloride (18.6 mmol) was continued to stir for 5 h, then stood overnight, and filtered with suction to obtain a light yellow liquid. Wash with HCl (1mol / L), NaOH (1mol / L) and distilled water successively, retain the supernatant, dry with anhydrous sodium sulfate, filter, remove the solvent, and obtain a light yellow s...

Embodiment 2

[0038] UV absorber body preparation: 5g SiO 2 Ultrasonic disperse in 100mL toluene for 30min, add 15g of 3-aminopropyltriethoxysilane (APES), reflux at 115°C for 6h, filter (polycarbonate membrane, 0.22μm) after the reaction, wash completely with toluene, After filtration, vacuum-dry at room temperature for 24 hours to obtain APES-SiO 2 ; 2g APES-SiO 2 Disperse in 50mL of dimethylformamide (DMF), add 0.25g of β-cyclodextrin-p-toluenesulfonate (β-CD-Ts) in DMF solution, heat up to 60°C, in N 2 Stir under protection for 7 hours, stand overnight at room temperature, collect the product, wash with DMF and acetone, and dry in air to obtain Si-CD, the main body of the ultraviolet absorber;

[0039] Preparation of guest materials: Dissolve hydroxyethylmethacrylate (HEMA) (15mmol) and tripropylamine (23mmol) in 200mL of anhydrous dichloromethane (0-5°C), then add 3.7g of adamantane methyl The dichloromethane solution of acid chloride (18.6 mmol) was continued to stir for 5 h, then st...

Embodiment 3

[0044] UV absorber body preparation: 15g α-CD dissolved in 100g 65wt% ZnCl 2 In the aqueous solution, stir at 80°C (500r / min), add 15wt% NaOH solution dropwise to adjust the pH to 8.4, continue to stir for 30min and then centrifuge, and wash the product with ultrapure water to obtain ZnO-CD, the main body of the ultraviolet absorber;

[0045] Guest material: The guest material is p-aminoazobenzene (Azo-NH 2 );

[0046] Preparation of functional monomer (assembly): ultrasonically disperse 300 mg of the prepared main body ZnO-CD into 10 mL of DMSO aqueous solution (DMSO / water = 9:1), add Azo-NH 2 (~15eq.) Stirring at room temperature for 24h to prepare the assembly solution;

[0047] Coating preparation and application by polymerization: Add 1g of base material——DMSO solution of bisphenol A epoxy resin to 10mL of assembly solution (330mg), mix quickly and ultrasonically remove air bubbles, apply on wood sample strips, at 40°C A coating is formed within 30 hours of copolymeriz...

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Abstract

The invention relates to uvioresistant paint and a preparation method thereof, and belongs to the field of functional polymer materials. The paint is formed by copolymerizing functional monomers comprising host-guest inclusion and polymer functional groups, and polymer matrix monomers. The functional monomers are mainly prepared from a cyclodextrin-modified ultraviolet light absorber and a guest material. The polymer matrix monomers are paint base materials. The ultraviolet light absorber and the paint base materials are connected together through cyclodextrin host-guest inclusion supramolecular interaction. The uvioresistant paint can be used for being spread on the surface of a substrate material and forms a coating on the surface of the substrate material after a solvent is evaporated. The coating can absorb 90% or more ultraviolet light, so that a sample is protected against ageing, and scratches made on the surface of the coating through a scalpel can disappear after pure water is dripped on the surfaces of the scratches.

Description

technical field [0001] The invention relates to an anti-ultraviolet coating and a preparation method thereof, in particular to an anti-ultraviolet coating with self-repairing function, its preparation method, and its application, belonging to the field of functional polymer materials. Background technique [0002] Materials will inevitably be exposed to sunlight during use, and the high-energy ultraviolet rays in sunlight will accelerate the aging of materials and greatly shorten the service life of materials. Studies have shown that most organic materials, such as most polymer materials and wood products, will undergo photooxidation and photodegradation through the accumulation of ultraviolet light energy, resulting in performance degradation such as discoloration and brittleness (Zayat et al., Chem Soc Rev 2007, 36, 1270; Nespurek et al., J Optoelect AdvMater 2005, 7, 1157.). Coating coating materials that can absorb or shield ultraviolet light on the surface of material ...

Claims

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Application Information

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IPC IPC(8): C09D151/02C09D5/32C09D7/12
CPCC08K3/22C08K3/36C08K5/544C08K2003/2241C08K2003/2296C08L2201/08C09D5/32C09D7/61C09D7/63C09D151/02
Inventor 李帮经梁相永丁立生
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S