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Preparation method of halogen-free flame-retardant polyvinyl alcohol film

A technology of polyvinyl alcohol film and polyvinyl alcohol, which is applied in the direction of coating, etc., can solve the problems of poor flame retardant performance, mechanical properties and thermal stability that cannot be further improved, achieve good flame retardant effect, and avoid the loss of active ingredients , the effect of increasing the cracking temperature

Inactive Publication Date: 2019-01-04
FOSHAN SENANG BIO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: Aiming at the problem that the traditional polyvinyl alcohol film has poor flame retardancy and the mechanical properties and thermal stability cannot be further improved, a preparation method of a halogen-free flame-retardant polyvinyl alcohol film is provided

Method used

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  • Preparation method of halogen-free flame-retardant polyvinyl alcohol film

Examples

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example 1

[0024] According to parts by weight, take 10 parts of chitosan, 3 parts of sodium periodate, and 120 parts of water in turn, first mix chitosan and water and pour them into the reaction kettle, at a temperature of 85 °C, and a speed of 800 r / min Under certain conditions, after stirring and dispersing at a constant temperature for 60 minutes, add sodium periodate, continue to stir and react at a constant temperature for 4 hours, and then concentrate the material in the reaction kettle in a rotary evaporator at a temperature of 85 ° C and a pressure of 450 mmHg for 60 minutes. , to obtain a concentrate, and then vacuum-dry the obtained concentrate at a temperature of 90°C and a pressure of 120Pa to a constant weight to obtain a dry concentrate, then pour the obtained dry concentrate into a mortar, and grind it into powder to obtain Modified chitosan powder; in parts by weight, successively get 10 parts of polyvinyl alcohol, 8 parts of modified chitosan powder, 6 parts of polyethy...

example 2

[0026]In parts by weight, successively take 10 parts of polyvinyl alcohol, 8 parts of chitosan, 6 parts of polyethylene glycol, 10 parts of aluminum alkoxide, 0.8 part of defoamer, 120 parts of dimethyl sulfoxide, mix and pour Put it into a three-necked flask, and move the three-necked flask to a digital display velocity measuring constant temperature magnetic stirrer, under the condition of a temperature of 85°C and a rotating speed of 600r / min, after stirring and reacting at a constant temperature for 4 hours, stop heating and stirring, and stand for defoaming to obtain Film-forming solution: apply the obtained film-forming solution on the surface of a glass plate, control the coating thickness to 0.8mm, then immerse the coated glass plate in a zinc sulfate water bath to precipitate a film, take out the glass plate, and peel off the film , to obtain a membrane blank; then wash the obtained membrane blank with deionized water for 5 times, and immerse the cleaned membrane blank...

example 3

[0028] According to parts by weight, take 10 parts of chitosan, 3 parts of sodium periodate, and 120 parts of water in turn, first mix chitosan and water and pour them into the reaction kettle, at a temperature of 85 °C, and a speed of 800 r / min Under certain conditions, after stirring and dispersing at a constant temperature for 60 minutes, add sodium periodate, continue to stir and react at a constant temperature for 4 hours, and then concentrate the material in the reaction kettle in a rotary evaporator at a temperature of 85 ° C and a pressure of 450 mmHg for 60 minutes. , to obtain a concentrate, and then vacuum-dry the obtained concentrate at a temperature of 90°C and a pressure of 120Pa to a constant weight to obtain a dry concentrate, then pour the obtained dry concentrate into a mortar, and grind it into powder to obtain Modified chitosan powder; in parts by weight, successively get 10 parts of polyvinyl alcohol, 8 parts of modified chitosan powder, 6 parts of polyethy...

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Abstract

The invention discloses a preparation method of a halogen-free flame-retardant polyvinyl alcohol film and belongs to the technical field of high-polymer film materials. The preparation method includes: subjecting chitosan and sodium periodate to heating and stirring reaction, concentrating, drying, and grinding to obtain modified chitosan powder; mixing polyvinyl alcohol, the modified chitosan powder, polyethylene glycol, aluminum alkoxide and dimethyl sulfoxide, performing constant-temperature stirring reaction, and standing and defoaming to obtain film-forming liquid; coating a glass plate with the film-forming liquid, soaking into zinc sulfate water bath for precipitation film forming, and removing the film to obtain a film base; washing the film base with water, soaking into the ethanol solution of terephthalaldehyde, performing constant-temperature ultrasonic reaction to obtain a crosslinking membrane base; washing the crosslinking membrane base with water, and performing vacuum freeze drying until constant weight is achieved to obtain the halogen-free flame-retardant polyvinyl alcohol film. The halogen-free flame-retardant polyvinyl alcohol film is excellent in flame retardance, mechanical performance and heat stability.

Description

technical field [0001] The invention discloses a preparation method of a halogen-free flame-retardant polyvinyl alcohol film, which belongs to the technical field of polymer film materials. Background technique [0002] In recent years, petroleum-based plastic packaging materials (such as polyethylene, polypropylene, etc.) have caused increasingly severe environmental problems. The use of disposable plastic products is increasing day by day, which has brought serious "white pollution" problems to the human ecological environment. The current society's environmental protection requirements for industrial products and daily necessities are constantly increasing, and the demand for green and environmentally friendly films is increasing, making biodegradable packaging materials a research hotspot. Polyvinyl alcohol (PVA), as a biodegradable synthetic polymer, has been widely recognized for its environmental protection properties. [0003] Polyvinyl alcohol (PVA) has excellent ...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L5/08C08L71/02C08K3/22C08J5/18C08J7/06
CPCC08J5/18C08J7/065C08J2329/04C08J2405/08C08J2471/02C08K2003/2227C08K2201/011
Inventor 胡次兵马俊杰朱东东
Owner FOSHAN SENANG BIO TECH CO LTD