Highly transparent flame-retardant polyvinyl alcohol film and preparation method thereof

A polyvinyl alcohol film and polyvinyl alcohol technology, applied in the field of polymer chemistry, can solve the problems of reduced flame retardant efficiency, unstable film properties, and easy changes in film properties, achieving high transparency and good wet stability , Excellent flame retardant performance

Active Publication Date: 2021-07-27
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame-retardant PVA materials provided by the above-mentioned patent documents are all opaque, and the additives are inert. They are physically mixed with PVA and do not chemically react with PVA. They are easy to migrate out of the film after encountering water during use, reducing its resistance. fuel efficiency, the properties of the film become unstable
[0004] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: under the premise of ensuring the flame retardant performance, the transparency of the flame retardant PVA film is not good, and the combination of the flame retardant and PVA is not stable enough , resulting in easy changes in film properties

Method used

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  • Highly transparent flame-retardant polyvinyl alcohol film and preparation method thereof
  • Highly transparent flame-retardant polyvinyl alcohol film and preparation method thereof
  • Highly transparent flame-retardant polyvinyl alcohol film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Take 100.00g of a transparent PVA aqueous solution with a mass percentage concentration of 12%, add 2.10g of a CEP aqueous solution with a mass percentage concentration of 30%, and stir for 1-3 hours to obtain a stable viscous solution with a uniform hue, which is a mixture containing CEP and PVA. Solution, based on the sum of the mass of CEP and PVA in the mixed solution, the mass content of CEP in the mixed solution is 5%. The mixed solution was poured into a glass mold and cast into a film. The film was placed at 30°C for 4 hours to partially volatilize the solvent, and then placed in a vacuum drying oven at 80°C to continue drying to constant weight to obtain a highly transparent flame-retardant PVA film.

Embodiment 2

[0060] Take 100.00g of a transparent PVA aqueous solution with a mass percentage concentration of 12%, add 4.45g of a CEP aqueous solution with a mass percentage concentration of 30%, and stir for 1-3 hours to obtain a stable viscous solution with uniform hue, which is a mixture containing CEP and PVA. The solution is based on the mass sum of CEP and PVA in the mixed solution, and the mass content of CEP in the mixed solution is 10%. The mixed solution was poured into a glass mold and cast into a film. The film was placed at 30°C for 4 hours to partially volatilize the solvent, and then placed in a vacuum drying oven at 80°C to continue drying to constant weight to obtain a highly transparent flame-retardant PVA film.

[0061] figure 2 For the light transmittance of comparative example and embodiment 2 gained PVA film, the result shows that in the scope of visible light, the light transmittance of comparative example pure PVA film is 90%, but the composite PVA film (embodime...

Embodiment 3

[0064] Take 100.00g of a transparent PVA aqueous solution with a mass percent concentration of 12%, add 7.06g of a CEP aqueous solution with a mass percent concentration of 30%, and stir for 1-3 hours to obtain a stable viscous solution with a uniform hue, which is a mixture containing CEP and PVA. The solution is based on the mass sum of CEP and PVA in the mixed solution, and the mass content of CEP in the mixed solution is 15%. The mixed solution was poured into a glass mold and cast into a film. The film was placed at 30°C for 4 hours to partially volatilize the solvent, and then placed in a vacuum drying oven at 80°C to continue drying to constant weight to obtain a highly transparent flame-retardant PVA film.

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Abstract

The invention discloses a highly transparent flame-retardant PVA film and a preparation method thereof. The PVA film has excellent flame-retardant performance, a flame retardant can be stably combined with the PVA, and the flame-retardant PVA film has high transparency. The preparation method of the highly transparent flame retardant PVA film is to prepare the highly transparent flame retardant PVA film from a mixed solution containing methacrylic acid phosphinic acid and PVA, and use the methacrylic acid phosphinic acid group in the mixed solution to form a film. The mass sum of phosphonic acid and PVA is used as a benchmark, and the mass content of methyl propionyl phosphinic acid in the mixed solution is 5%-30%. Preferably, the film-forming method is to dry at 50-100°C after casting to obtain the highly transparent flame-retardant PVA film.

Description

technical field [0001] The invention relates to the technical field of polymer chemistry, in particular to a highly transparent flame-retardant polyvinyl alcohol film and a preparation method thereof. Background technique [0002] As people's research on composite materials continues to deepen, transparent polymers have shown important application value in the frontier fields of today's material research, such as organic light-emitting diodes, flexible solar cells, wearable smart devices, and aerospace. Polyvinyl alcohol (PVA) is one of the most widely used polymer materials at present. It has excellent light transmission, film-forming properties, gas barrier properties and biodegradability, making it have a good application prospect in electronic materials. However, the PVA material is extremely flammable and has a low oxygen index, which seriously affects its application in the above-mentioned fields. In addition, uncrosslinked PVA is easy to swell in water and has poor we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L29/04C08K5/5313
CPCC08J5/18C08J2329/04C08K5/5313
Inventor 刘学清刘继延邹立勇刘志宏张远方陈佳石红尤庆亮肖标
Owner JIANGHAN UNIVERSITY
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