A barrier flame-retardant polyvinyl alcohol composite material and its preparation method

A technology of polyvinyl alcohol and composite materials, applied in the field of composite materials, can solve the problems of poor flame retardancy and barrier properties, and achieve the effects of low cost, flammability and easy industrial production

Active Publication Date: 2020-09-01
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of poor barrier properties and poor flame retardancy existing in existing polyvinyl alcohol composite materials

Method used

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  • A barrier flame-retardant polyvinyl alcohol composite material and its preparation method
  • A barrier flame-retardant polyvinyl alcohol composite material and its preparation method
  • A barrier flame-retardant polyvinyl alcohol composite material and its preparation method

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Embodiment 1

[0028] A method for preparing a barrier flame-retardant polyvinyl alcohol composite material, comprising the steps of:

[0029] Step S1, 0.7 parts by weight of graphene oxide with an aspect ratio of 500, 0.5 parts by weight of α-zirconium phosphate with an aspect ratio of 200, and 5 parts by weight of sulfonated polyphosphazene with a particle size of 1 μm and a sulfonation degree of 5%. The microspheres are added into 10 parts by weight of water, 100 kHz ultrasonic dispersion, and the ultrasonic time is 60 minutes to obtain a sulfonated polyphosphazene / α-zirconium phosphate / graphene oxide mixed liquid system; wherein, the sulfonation degree of 5% refers to the The mass of sulfonic acid groups in the sulfonated polyphosphazene microspheres accounts for 5% of the total mass of the microspheres;

[0030] Step S2, adding 94 parts by weight of polyvinyl alcohol to 75 parts by weight of deionized water at a temperature of 95°C, stirring and dissolving for 5 hours to obtain an aqueo...

Embodiment 2

[0033] A method for preparing a barrier flame-retardant polyvinyl alcohol composite material, comprising the steps of:

[0034] Step S1, 1 part by weight of graphene oxide with an aspect ratio of 2000, 1 part by weight of α-zirconium phosphate with an aspect ratio of 500, and 10 parts by weight of sulfonated polyphosphazene with a particle size of 0.5 μm and a degree of sulfonation of 3%. Microspheres were added into 20 parts by weight of water, 100 kHz ultrasonic dispersion, ultrasonic time 30min, to obtain sulfonated polyphosphazene / α-zirconium phosphate / graphene oxide mixed liquid system; wherein, the sulfonation degree of 3% refers to the The mass of sulfonic acid groups in the sulfonated polyphosphazene microspheres accounts for 3% of the total mass of the microspheres;

[0035] Step S2, adding 88 parts by weight of polyvinyl alcohol to 75 parts by weight of deionized water at a temperature of 85°C, stirring and dissolving for 6 hours to obtain an aqueous solution of poly...

Embodiment 3

[0038] Step S1, 2 parts by weight of graphene oxide with an aspect ratio of 3000, 3 parts by weight of α-zirconium phosphate with an aspect ratio of 1000, and 15 parts by weight of sulfonated polyphosphazene microparticles with a particle size of 2 μm and a degree of sulfonation of 9%. The balls were added into 25 parts by weight of water, dispersed by ultrasonic at 100 kHz, and the ultrasonic time was 60 min, to obtain a mixed liquid system of sulfonated polyphosphazene / α-zirconium phosphate / graphene oxide.

[0039] Step S2, adding 60 parts by weight of polyvinyl alcohol to 90 parts by weight of deionized water at a temperature of 80°C, stirring and dissolving for 6 hours to obtain an aqueous solution of polyvinyl alcohol; then adding the sulfonated polyphosphazene / α-zirconium phosphate prepared in step S1 The / graphene oxide mixed liquid system was added to the polyvinyl alcohol aqueous solution, and the polyvinyl alcohol / sulfonated polyphosphazene / α-zirconium phosphate / graph...

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Abstract

The invention discloses a barrier flame-retardant polyvinyl alcohol composite material. The barrier flame-retardant polyvinyl alcohol composite material is prepared from the following raw materials: polyvinyl alcohol, graphene oxide, alpha-zirconium phosphate and sulfonated polyphosphonitrile microspheres by virtue of an intercalation-solution compositing method. The preparation method comprises the following steps: S1, ultrasonically dispersing the graphene oxide, alpha-zirconium phosphate and sulfonated polyphosphonitrile microspheres in the water, and obtaining a mixed solution system; S2,dissolving the polyvinyl alcohol in hot water, and obtaining a polyvinyl alcohol aqueous solution; and adding the mixed solution system obtained in S1 into the polyvinyl alcohol aqueous solution, stirring for 5 to 10 hours, and obtaining polyvinyl alcohol / sulfonated polyphosphonitrile / alpha-zirconium phosphate / graphene oxide mixed solution; and S3, pouring the mixed solution obtained in step S2 into a glass mold, drying in an non-isothermal manner, and obtaining the polyvinyl alcohol composite material. By introducing the sulfonated polyphosphonitrile microspheres, graphene oxide and alpha-zirconium phosphate with different structural characteristics, the polyvinyl alcohol material has relatively good barrier performance and flame retardant performance and can improve the comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a barrier and flame-retardant polyvinyl alcohol composite material and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVA) is the hydrolysis product of polyvinyl acetate. It is an odorless and non-toxic synthetic polymer. It has three forms of flake, floc or powder solid. The molecular structure is relatively regular. crystalline polymer. With the different structure, degree of alcoholysis and degree of polymerization of PVA, it has diversified properties. Such as good barrier properties, film-forming properties, biodegradability, solubility, etc., are widely used in food packaging, washing packaging and chemical packaging. [0003] However, polyvinyl alcohol materials also have the common properties of plastic materials, that is, they are easy to burn, and polyvinyl alcohol materials for films have extremely high requirem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L85/02C08K3/04C08K3/32
CPCC08K2003/328C08K2201/011C08L29/04C08L2201/02C08L2201/14C08L2205/18C08L85/02C08K7/00C08K3/042C08K3/32
Inventor 赵春霞丁杰李云涛李辉向东赵玲
Owner SOUTHWEST PETROLEUM UNIV
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