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Spraying method for preparing graphene/polymer emulsion composite thin film material

A technology of polymer emulsion and composite film, which is applied in the field of preparation of graphene/polymer emulsion nanocomposite film materials, can solve the problems of complex operation of in-situ polymerization, reduction of polymer molecular weight, and poor dispersion of graphene, etc., to achieve Large-scale industrial production, good stability, and excellent barrier properties

Inactive Publication Date: 2014-07-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as the solution blending method requires a large amount of solvents, high cost, and serious environmental pollution; in the nanocomposites prepared by the melt blending method, graphene has poor dispersion; the in-situ polymerization method is complicated to operate, and the presence of graphene will change Polymerization kinetics, the molecular weight of the polymer also decreases

Method used

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  • Spraying method for preparing graphene/polymer emulsion composite thin film material
  • Spraying method for preparing graphene/polymer emulsion composite thin film material
  • Spraying method for preparing graphene/polymer emulsion composite thin film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare 400ml of graphite oxide aqueous solution with a concentration of 1.0mg / ml, ultrasonically peel and disperse for 3 hours; add sodium dodecylbenzenesulfonate with a mass fraction of 0.5wt%, mix and stir evenly, and ultrasonically disperse for 1 hour; add 0.4ml of mass fraction With a fraction of 85% hydrazine hydrate, continue to ultrasonically disperse for 3 hours to obtain a black graphene hydrosol. Mix the styrene-acrylic emulsion and graphene hydrosol uniformly according to the volume ratio of 1:5 to prepare the graphene / styrene-acrylic composite emulsion; heat the polytetrafluoroethylene substrate to 100C, spray the graphene / polymer nano-composite emulsion, Repeat 30 times by spraying for 1 minute with an interval of 2 minutes to obtain a graphene / styrene-acrylic nanocomposite film. Such as figure 1 As shown in the graphene infrared characterization (IR) diagram, it can be seen that the reduced graphene oxide graphene has a good degree of reduction and can r...

Embodiment 2

[0044] Prepare 400ml of graphite oxide aqueous solution with a concentration of 0.5mg / ml, ultrasonically peel and disperse for 3 hours; add sodium dodecylbenzenesulfonate with a mass fraction of 0.1wt%, mix and stir evenly, and ultrasonically disperse for 1 hour; add 0.4ml of mass fraction With a fraction of 85% hydrazine hydrate, continue ultrasonic dispersion for 2 hours to obtain a black graphene hydrosol. Mix the styrene-acrylic emulsion, graphene hydrosol and deionized water according to the volume ratio of 1:3:2 to prepare the graphene / styrene-acrylic composite emulsion; spray it on the polytetrafluoroethylene substrate at 100°C, Spray for 1 minute with an interval of 2 minutes, and repeat this 30 times to obtain a graphene / styrene-acrylic nanocomposite film.

[0045] Such as figure 1 As shown in the graphene infrared characterization (IR) figure, it can be seen that reduced graphene oxide graphene has a good degree of reduction, can remove most of the oxygen-containing...

Embodiment 3

[0047] Prepare 400ml of graphite oxide aqueous solution with a concentration of 1.0mg / ml, ultrasonically peel and disperse for 2 hours; add sodium dodecylbenzenesulfonate with a mass fraction of 0.2wt%, mix and stir evenly, and ultrasonically disperse for 1 hour; add 0.4ml of mass With a fraction of 85% hydrazine hydrate, continue to ultrasonically disperse for 3 hours to obtain a black graphene hydrosol. Mix the styrene-butadiene emulsion, graphene hydrosol and deionized water evenly according to the volume ratio of 1:1:1 to prepare the graphene / styrene-butadiene composite emulsion; configure 1.0mmg / ml dodecylbenzenesulfonic acid Sodium aqueous solution, sprayed on the 100°C PET substrate, sprayed for 1 minute, with an interval of 2 minutes, and repeated 15 times; then sprayed the graphene / butadiene nanocomposite emulsion on the substrate, sprayed for 1 minute, with an interval of 2 minutes, and repeated for 30 times. Once, the graphene / butadiene-butadiene nanocomposite film ...

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Abstract

The invention relates to a spraying method for preparing a graphene / polymer emulsion composite thin film material. The method is characterized by comprising the steps of reducing graphene oxide to obtain graphene; obtaining a stably-dispersed high-concentration graphene aqueous solution by adding a small amount of surfactants; and uniformly mixing with a polymer emulsion, and then spraying on a substrate to prepare a graphene / polymer emulsion nano composite thin film material with good conductivity. Compared with the prior art, the spraying method disclosed by the invention has the advantages of low cost, simple preparation process, no environment pollution, easily-realized large-scale industrial production, and the like.

Description

technical field [0001] The invention belongs to the field of preparation of polymer nanocomposite materials, in particular to a method for preparing a graphene / polymer emulsion nanocomposite thin film material. Background technique [0002] Graphene is a two-dimensional honeycomb carbon material composed of a single layer of carbon atoms tightly packed. In 2004, British scientists Geim et al. successfully prepared graphene that existed stably at room temperature, which attracted widespread attention (Novoselov K, Geim A, et al. Science, 2004, v306: 666-669). Compared with traditional carbon-based fillers, graphene has more excellent electrical properties, thermal properties, mechanical properties and optical properties, which makes it an ideal filler for preparing polymer composites. Graphene-polymer composites have broad application prospects in the fields of catalysis, high-strength materials, electronics, energy conversion and storage, biotechnology, and biochemical sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L33/08C08L9/06C08L25/14C08L75/04C08K3/04
Inventor 张东刘琳刘泳
Owner TONGJI UNIV
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