Method for preparing polyvinyl alcohol foam material using modified graphene as filler

A technology of polyvinyl alcohol and foam materials, applied in the field of porous materials, can solve the problems of weak surface strength and rigidity, difficult to uniformly disperse, poor compression hardness, etc., and achieve the effects of improving mechanical properties, improving thermodynamic properties, and excellent performance.

Active Publication Date: 2016-03-09
东莞市恒彩塑胶颜料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: the surface strength and rigidity of the current polyethylene foam plastics are weak, the compression hardness is relatively poor, and graphene has a super high specific surface area, and it is very easy to agglomerate with each other, and it is difficult to evenly disperse in a solvent In order to solve the problem in the medium, a preparation method of polyvinyl alcohol foam material with modified graphene as filler is provided. The present invention first prepares graphene oxide, and carr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Take 10g of graphite powder, 5g of potassium persulfate, and 5g of phosphorus pentoxide into a 1000mL round-bottomed flask, then add 40mL of sulfuric acid with a mass fraction of 98% into the bottle, put the flask in a water bath, and heat it at a temperature of 75°C. Stir the reaction for 4 hours; after the reaction, transfer it to an ice bath, control the temperature at 0°C, add 5g of sodium nitrate and 150mL of 98% sulfuric acid into the flask, slowly add 20g of potassium permanganate while stirring, and continue stirring 2h, control the temperature at 0°C, transfer to a water bath after the reaction is over, raise the temperature to 30°C, add 250mL of distilled water to the bottle at this temperature, and stir for 30min, then raise the temperature to 95°C and stir for 20min After stirring, pour the reaction solution into a beaker, add 200 mL of distilled water and 30 mL of 30% hydrogen peroxide into the beaker, stir for 10 minutes and then filter, wash the filter res...

example 2

[0021]Take 13g of graphite powder, 6g of potassium persulfate, and 6g of phosphorus pentoxide into a 1000mL round bottom flask, then add 50mL of sulfuric acid with a mass fraction of 98% into the flask, put the flask into a water bath, and set the temperature at 80°C Stir the reaction for 4.5 hours; after the reaction, transfer it to an ice bath, control the temperature at 3°C, add 6g of sodium nitrate and 175mL of 98% sulfuric acid into the flask, slowly add 23g of potassium permanganate while stirring, and continue Stir for 2.5 hours, control the temperature at 10°C, transfer to a water bath after the reaction, raise the temperature to 35°C, add 275mL of distilled water to the bottle while maintaining this temperature, and stir for 35min, then raise the temperature to 91°C and Stir for 23min. After the stirring is over, pour the reaction solution into a beaker, add 230mL of distilled water and 35mL of 30% hydrogen peroxide into the beaker, stir for 10min and filter, wash the ...

example 3

[0024] Take 15g of graphite powder, 7g of potassium persulfate, and 7g of phosphorus pentoxide into a 1000mL round bottom flask, then add 60mL of sulfuric acid with a mass fraction of 98% into the bottle, put the flask in a water bath, and heat it at a temperature of 85°C. Stir the reaction for 5 hours; after the reaction, transfer it to an ice bath, control the temperature at 5°C, add 7g of sodium nitrate and 200mL of sulfuric acid with a mass fraction of 98% to the flask, slowly add 25g of potassium permanganate while stirring, and continue stirring 3h, control the temperature at 20°C, move it into a water bath after the reaction is over, raise the temperature to 40°C, add 300mL of distilled water to the bottle while maintaining this temperature, and stir for 40min, after the reaction, raise the temperature to 100°C and stir for 25min , after stirring, pour the reaction solution into a beaker, add 260mL distilled water and 40mL 30% hydrogen peroxide into the beaker, stir for ...

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PUM

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Abstract

The present invention discloses a method for preparing a polyvinyl alcohol foam material using modified graphene as a filler, and belongs to the field of porous materials. According to the method, graphene oxide is first prepared, a stable colloidal suspension is formed by ultrasonic dispersion of the graphene oxide in alkaline water, the stable colloidal suspension is mixed with gelatin, dextrin and a crosslinking agent, and then added into polyvinyl alcohol, graphene and polyvinyl alcohol show good compatibility, hydrogen bonding interactions between the graphene and the polyvinyl alcohol can be produced, polyvinyl alcohol molecular chains form physical crosslinking points, mechanical strength and toughness of the polyvinyl alcohol polymer can be greatly improved, excellent performance of the graphene can be played, and the thermodynamic properties of the polyvinyl alcohol material can be improved.

Description

technical field [0001] The invention discloses a preparation method of a polyvinyl alcohol foam material with modified graphene as a filler, belonging to the field of porous materials. Background technique [0002] The main properties and application fields of polyethylene foam. Polyethylene foam has excellent secondary processing performance, and can be cut, cut, sawed, planed, ironed, and nailed by general machinery, and it is completely suitable for structural foam with low expansion ratio. Polyethylene foam can also be laminated with other materials to make up for weak surface strength and rigidity, poor compression hardness, or to achieve the purpose of beautifying the surface. Polyethylene foam, because most of them are closed-cell structure, low thermal conductivity, good heat insulation, cross-linked polyethylene foam has good weather resistance, less aging and deterioration, low hygroscopicity, good sound insulation effect, good chemical stability , if it is a foa...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L89/00C08L3/02C08K9/00C08K9/02C08K3/04C08K5/1515C08J3/24C08J9/04
CPCC08J3/246C08J9/0061C08J9/04C08J2329/04C08J2403/02C08J2489/00C08L29/04C08L2203/14C08L2205/03C08L89/00C08L3/02C08K9/00C08K9/02C08K3/04C08K5/1515
Inventor 仇颖超王志慧
Owner 东莞市恒彩塑胶颜料有限公司
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