Trehalose modified polyvinyl alcohol anti-fog and anti-frost coating and preparation method thereof

A technology of polyvinyl alcohol and trehalose, applied in coatings, chemical instruments and methods, and other chemical processes, can solve problems such as poor stability of composite systems

Active Publication Date: 2021-06-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of small molecule trehalose makes the complex system have poor stability.

Method used

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  • Trehalose modified polyvinyl alcohol anti-fog and anti-frost coating and preparation method thereof
  • Trehalose modified polyvinyl alcohol anti-fog and anti-frost coating and preparation method thereof
  • Trehalose modified polyvinyl alcohol anti-fog and anti-frost coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Synthesis of polyvinyl alcohol-graft-trehalose:

[0038] 2.45g carboxylated trehalose, 0.3g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 0.13g 4-dimethylaminopyridine were dissolved in 10mL deionized water, and 110 mL of 10 mg / mL polyvinyl alcohol solution was added to the reaction bottle, and reacted at room temperature for 1 day. After the reaction, a dialysis bag was used for dialysis treatment for 1 day, and then the white flocculent solid sample was collected by lyophilization.

[0039] (2) Preparation of anti-fog / anti-frost coating containing polyvinyl alcohol-graft-trehalose:

[0040] Polyvinyl alcohol-graft-trehalose: 1%;

[0041] Oligoethylene glycol dimethacrylate: 0.1%;

[0042] Benzoin dimethyl ether: 0.05%;

[0043] Deionized water: 98.85%.

[0044] Both sides of the glass sheet were treated with plasma for 2 min each, and then immersed in a toluene solution of 1% (3-mercaptopropyl) trimethoxysilane for 1 h, and then soaked in toluen...

Embodiment 2

[0049] (1) Synthesis of polyvinyl alcohol-graft-trehalose:

[0050] 4.91g carboxylated trehalose, 0.6g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 0.26g 4-dimethylaminopyridine were dissolved in 10mL deionized water, and 55mL of 20mg / mL polyvinyl alcohol solution was added to the reaction bottle and reacted at room temperature for 1 day. After the reaction was completed, a dialysis bag was used for dialysis treatment for 1 day, and then the white flocculent solid sample was collected by lyophilization.

[0051] (2) Preparation of anti-fog / anti-frost coating containing polyvinyl alcohol-graft-trehalose:

[0052] Polyvinyl alcohol-graft-trehalose: 2%;

[0053] Oligoethylene glycol dimethacrylate: 0.2%;

[0054] Benzoin dimethyl ether: 0.1%;

[0055] Deionized water: 97.7%.

[0056] Both sides of the glass sheet were treated with plasma for 2 min respectively, and then immersed in 2% (3-mercaptopropyl) trimethoxysilane in toluene solution for 1.5 h, and then ...

Embodiment 3

[0061] (1) Synthesis of polyvinyl alcohol-graft-trehalose:

[0062] 7.36g carboxylated trehalose, 0.9g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 0.39g 4-dimethylaminopyridine were dissolved in 10mL deionized water, and 22.5mL of 40mg / mL polyvinyl alcohol solution was added to the reaction bottle, and reacted at room temperature for 2 days. After the reaction, a dialysis bag was used for dialysis treatment for 2 days, and then the white flocculent solid sample was collected by lyophilization.

[0063] (2) Preparation of anti-fog / anti-frost coating containing polyvinyl alcohol-graft-trehalose:

[0064] Polyvinyl alcohol-graft-trehalose: 5%;

[0065] Oligoethylene glycol dimethacrylate: 0.5%;

[0066] Benzoin dimethyl ether: 0.25%;

[0067] Deionized water: 94.25%.

[0068] Both sides of the glass sheet were treated with plasma for 3 minutes respectively, and then immersed in 3% (3-mercaptopropyl) trimethoxysilane in toluene solution for 2 hours, and then r...

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Abstract

The invention relates to a trehalose modified polyvinyl alcohol anti-fog and anti-frost coating and a preparation method thereof. The coating is prepared from polyvinyl alcohol-grafted-trehalose, low polyethylene glycol dimethacrylate, benzoin dimethyl ether and deionized water; the materials are uniformly mixed and coated on a transparent glass sheet, and the mixture is irradiated and cured by ultraviolet light to form the hydrophilic graft polymer semi-interpenetrating network coating. According to the prepared anti-fog and anti-frost coating, the light transmittance can be kept at 89-90% in the anti-fog process, the anti-frost time can be prolonged by 9-31 min, and the light transmittance value of the glass sheet coated with the coating on the two sides at the wave band of 400-800 nm is calculated by using a visible spectrophotometer. Good anti-fog and anti-frost performance is realized. The preparation method is simple and convenient and mild in reaction, and has great application potential in the field of fog and frost prevention.

Description

technical field [0001] The invention belongs to the technical field of polymer coating materials, and relates to a trehalose-modified polyvinyl alcohol anti-fog and anti-frost coating and a preparation method thereof; in particular to a synthesis of hydrophilic trehalose-modified polyvinyl alcohol and its Preparation method of anti-fog and anti-frost coating. Background technique [0002] The formation of fog and frost on the surface of transparent materials will significantly reduce their clarity and bring major challenges to the application of various optical devices. Therefore, coatings that provide anti-fog and anti-frost properties for transparent materials are of great significance. The main strategies of polymer anti-fog and anti-frost coatings include hydrophilic surface, hydrophobic surface and amphiphilic surface, and hydrophilic coating is a common method. The hydrophilic surface significantly suppresses the scattering of light by rapidly condensing water vapor i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D4/06C08F8/00C08F116/06C09K3/18
CPCC09D4/06C08F8/00C09K3/18C08F116/06
Inventor 袁晓燕白景奇任丽霞白珊朱孔营李晓晖
Owner TIANJIN UNIV
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