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Method for preparing acetylacetone polyvinyl alcohol/graphene nanocomposite

A technology of nanocomposite material and acetylacetone is applied in the field of preparation of polymer/graphene nanocomposite materials, which can solve the problems of unfavorable dispersion and peeling, and the modification effect of composite materials is no longer significant, and achieves the effect of simple and easy process.

Inactive Publication Date: 2013-04-03
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although graphene / polymer nanocomposites have been extensively studied, graphene sheets tend to agglomerate in polymers due to the strong lamellar interaction between graphene sheets, which is not conducive to dispersion and exfoliation.
The graphene in the composite material obtained in this way no longer has its unique huge specific surface area, and the modification effect on the composite material is no longer significant.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 (comparative embodiment)

[0026] In the 150mL reactor that is equipped with agitator, feed inlet of liquid, reflux condensing device, add 60 grams of deionized water, 5.4 grams of acetylacetonated polyvinyl alcohol, constant temperature is at 90 o C until the acetylacetonated polyvinyl alcohol is completely dissolved. 0g of graphene oxide (0wt% relative to acetylacetonated polyvinyl alcohol) was dissolved in 30ml of water, and ultrasonicated for half an hour until the dispersion was uniform. Slowly add the dispersion of graphene oxide into the aqueous solution of acetylacetonated polyvinyl alcohol, and continue mechanical stirring for 1 hour. After the mixture was cooled to room temperature, slowly drop the mixture into a polystyrene disc, 60 o C and dried in vacuo to constant weight. The tensile modulus is 25.8MPa, the tensile strength is 15.7MPa, and the elongation at break is 346.2%.

Embodiment 2

[0027] Embodiment 2 (comparative embodiment)

[0028] In the 150mL reactor that is equipped with agitator, feed inlet of liquid, reflux condensing device, add 60 grams of deionized water, 5.4 grams of acetylacetonated polyvinyl alcohol, constant temperature is at 90 o C until the acetylacetonated polyvinyl alcohol is completely dissolved. 0g of graphene oxide (0wt% relative to acetylacetonated polyvinyl alcohol) was dissolved in 30ml of water, and ultrasonicated for half an hour until the dispersion was uniform. Slowly add the dispersion of graphene oxide into the aqueous solution of acetylacetonated polyvinyl alcohol, and continue mechanical stirring for 1 hour. After the mixture was cooled to room temperature, 0.27g of glutaraldehyde (5wt% relative to acetylacetonated polyvinyl alcohol) was added and ultrasonicated for 15min until uniform. Slowly drop the mixture into a polystyrene disc, 60 o C and dried in vacuo to constant weight. The tensile modulus is 1000.2MPa, the ...

Embodiment 3

[0030] In the 150mL reactor that is equipped with agitator, feed inlet of liquid, reflux condensing device, add 60 grams of deionized water, 5.4 grams of acetylacetonated polyvinyl alcohol, constant temperature is at 90 o C until the acetylacetonated polyvinyl alcohol is completely dissolved. 0.0054g of graphene oxide (0.1wt% relative to acetylacetonated polyvinyl alcohol) was dissolved in 30ml of water, and ultrasonicated for half an hour until the dispersion was uniform. Slowly add the dispersion of graphene oxide into the aqueous solution of acetylacetonated polyvinyl alcohol, and continue mechanical stirring for 1 hour. After the mixture was cooled to room temperature, 0.27g of glutaraldehyde (5wt% relative to acetylacetonated polyvinyl alcohol) was added and ultrasonicated for 15min until uniform. Slowly drop the mixture into a polystyrene disc, 60 o C and dried in vacuo to constant weight. The tensile modulus is 1520MPa, the tensile strength is 42.7MPa, and the elonga...

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Abstract

The invention belongs to the technical field of nanocomposites, and in particular relates to a method for preparing an acetylacetone polyvinyl alcohol / graphene nanocomposite. The method adopts an acetic acid vinyl ester monomer emulsion living polymerization reaction method to prepare the acetylacetone polyvinyl alcohol / graphene nanocomposite and an acetylacetone polyvinyl alcohol / reduced graphene oxide nanocomposite. The obtained nanocomposites have excellent mechanical property.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and in particular relates to a preparation method of a polymer / graphene nanocomposite material. Background technique [0002] Composite material is a solid product composed of two or more independent physical phases, including bonding materials (matrix) and fillers such as pellets, fibers or sheet materials, which can maintain the important properties of the original constituent materials. Features, and through the composite effect, the performance of each component complements each other, and many excellent properties that the original components do not have are obtained. The so-called nanocomposite material was proposed by Roy and Komarneni in the 1980s. Unlike a single nanomaterial, it is a composite of two or more materials, at least one of which is nanoscale in one direction ( 1-100nm). There are many types of nanocomposites, among which polymer-based nanocomposites are col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08J3/24C08L29/04C08K3/04
Inventor 张波汤慧武培怡
Owner FUDAN UNIV
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