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Preparation method for GONS-reinforced PVC composite

A composite material, slow technology, applied in the field of materials, can solve the problems of unstudied GO stripping behavior, GONS characterization, long time, etc.

Inactive Publication Date: 2017-05-31
QINGDAO ZHIXIN BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these reports did not study the exfoliation behavior of GO, nor did they characterize the exfoliated GONS. At the same time, the preparation of GO by these methods is relatively long, which is not conducive to actual production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) A preparation method of GONS reinforced PVC composite material, the steps are as follows: add 50ml of concentrated sulfuric acid and 0.5g of graphite powder in a three-necked flask, stir evenly, cool to 0°C in an ice-water bath, then slowly add 0.5g of Potassium permanganate, slowly heat up to 35°C, react for 2 hours, then slowly heat up to 70°C, react for half an hour, until the potassium permanganate is completely consumed, and GO with a low oxidation degree is obtained. After the reaction is completed, pour Centrifugal sedimentation in a large amount of ice water, followed by washing 6 times with 10% hydrochloric acid aqueous solution and three times with deionized water, centrifuging to collect the product, and finally drying in a vacuum oven at 60°C to obtain GO with low oxidation degree.

[0014] (2) Ultrasonic disperse GO in 10ml deionized water for 1 hour, and then centrifuge at 4000 rpm for 30 minutes to remove unstripped GO to obtain GONS aqueous solution, ...

Embodiment 2

[0016] (1) A preparation method of GONS reinforced PVC composite material, the steps are as follows: add 50ml of concentrated sulfuric acid and 0.5g of graphite powder in a three-necked flask, stir evenly, cool to 0°C in an ice-water bath, then slowly add 1.0g of Potassium permanganate, slowly heat up to 35°C, react for 2 hours, then slowly heat up to 70°C, react for half an hour, until the potassium permanganate is completely consumed, and GO with a low oxidation degree is obtained. After the reaction is completed, pour Centrifugal sedimentation in a large amount of ice water, followed by washing 6 times with 10% hydrochloric acid aqueous solution and three times with deionized water, centrifuging to collect the product, and finally drying in a vacuum oven at 60°C to obtain GO with low oxidation degree.

[0017] (2) Ultrasonic disperse GO in 10ml deionized water for 1 hour, and then centrifuge at 4000 rpm for 30 minutes to remove unstripped GO to obtain GONS aqueous solution, ...

Embodiment 3

[0019] (1) A preparation method of GONS reinforced PVC composite material, the steps are as follows: add 50ml of concentrated sulfuric acid and 0.5g of graphite powder in a three-necked flask, stir evenly, cool to 0°C in an ice-water bath, then slowly add 1.5g of Potassium permanganate, slowly heat up to 35°C, react for 2 hours, then slowly heat up to 70°C, react for half an hour, until the potassium permanganate is completely consumed, and GO with a low oxidation degree is obtained. After the reaction is completed, pour Centrifugal sedimentation in a large amount of ice water, followed by washing 6 times with 10% hydrochloric acid aqueous solution and three times with deionized water, centrifuging to collect the product, and finally drying in a vacuum oven at 60°C to obtain GO with low oxidation degree.

[0020] (2) Ultrasonic disperse GO in 10ml deionized water for 1 hour, and then centrifuge at 4000 rpm for 30 minutes to remove unstripped GO to obtain GONS aqueous solution, ...

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PUM

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Abstract

The invention relates to a preparation method for a GONS-reinforced PVC composite. The preparation method comprises the following steps: (1) adding 50 ml of concentrated sulfuric acid and 0.5 g of graphite powder into a three-neck flask, carrying out uniform mixing under stirring, then carrying out cooling to 0 DEG C in an ice-water bath, slowly adding 0.5 to 1.5 g of potassium permanganate, carrying out slow heating to 35 DEG C, allowing the above substances to undergo a reaction for 2 h, then carrying out slow heating to 70 DEG C, and carrying out a reaction for half an hour so as to obtain GO with low oxidizability; and (2) subjecting GO to ultrasonic dispersion in 10 ml of deionized water for 1 h, then carrying out centrifugation at a rotating speed of 4000 rpm for 30 min to remove unpeeled GO so as to obtain an aqueous solution of GONS, adding 1 g of PVC into the aqueous solution of GONS, carrying out stirring at 90 DEG C for dissolving, then pouring a uniformly mixed solution onto a flat substrate, and carrying out drying at 60 DEG C until constant mass is obtained so as to obtain a PVC / GO composite film. The composite film prepared by using the method has substantially improved physical properties.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of GONS reinforced PVC composite material. Background technique [0002] The preparation of graphene has always been a hot and difficult topic in the scientific and industrial circles. Although many methods have successfully prepared graphene, each method has its own advantages, but there are also certain disadvantages. For example, the mechanical exfoliation method can prepare graphene sheets with the most complete structure, but it is too time-consuming and labor-intensive; chemical vapor deposition (CVD) can prepare high-quality graphene films, but this method requires high equipment and costs Higher; liquid-phase ultrasonic stripping has the advantages of simple operation and convenience, but it is highly dependent on the choice of solvent. Moreover, these methods also have a common shortcoming, that is, graphene cannot be prepared on a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/02C08K3/04
Inventor 孙国志
Owner QINGDAO ZHIXIN BIOLOGICAL TECH CO LTD