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Preparation method of gradient graphene/polyurethane conductive composite material

A conductive composite material, polyurethane technology, applied in chemical instruments and methods, layered products, fiber treatment, etc., can solve the problems that restrict the preparation and application of high-performance conductive composite materials, easy agglomeration of graphene, and clay improvement, etc., to achieve good results Mechanical properties, reduced percolation value, effect of low percolation value

Active Publication Date: 2016-09-28
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of conductive polymer composites often adopts blending methods: latex blending method, solution blending method and mechanical blending method. The two main challenges in the preparation of graphene / polymer materials are the dispersion of graphene and graphite Construction of ene network
The traditional blending method is not only cumbersome to operate, but also graphene is easy to agglomerate during blending, and the clay is greatly improved, and the matrix is ​​easy to increase viscosity or agglomerate during blending, which seriously restricts the preparation and application of high-performance conductive composite materials.

Method used

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  • Preparation method of gradient graphene/polyurethane conductive composite material
  • Preparation method of gradient graphene/polyurethane conductive composite material
  • Preparation method of gradient graphene/polyurethane conductive composite material

Examples

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Effect test

Embodiment 1

[0028] The preparation method of the graphene / polyurethane conductive composite material of the present embodiment, the steps are as follows:

[0029] (1) Choose DMF as the organic solvent, weigh 3g of TPU pellets, put them in 70ml of DMF solvent, and stir for 30min at a temperature of 40°C; according to the proportion of 0.2wt%, measure 1.333g of graphene in water dispersion (graphene content 0.45wt%), put it in 20ml of DMF solvent, ultrasonic for 10min; mix the two solutions, and clean the graphene DMF beaker with 10ml of DMF solution, stir and ultrasonic for 30min again; after the mixed solution is cooled, add it dropwise 500ml of methanol, to obtain flocs; filter the above-mentioned flocs, and put them in an oven to dry for 20h at 80°C to obtain graphene-containing polyurethane powder;

[0030] (2) The graphene-containing polyurethane powder obtained in step (1) was hot-pressed at 210°C and 15 MPa for 10 minutes, and graphene / polyurethane conductive composite materials wit...

Embodiment 2

[0032] The preparation method of the gradient graphene / polyurethane conductive composite material of the present embodiment, the steps are as follows:

[0033] (1) Choose DMF as the organic solvent, weigh 3g of TPU pellets, put them in 70ml of DMF solvent, and stir for 30min at a temperature of 40°C; according to the proportion of 0.2wt%, measure 1.333g of graphene in water dispersion , put in 20ml of DMF solvent, ultrasonic for 10min, mix the two solutions, and clean the graphene DMF beaker with 10ml of DMF solution, stir and ultrasonic for 30min again; after the mixed solution is cooled, add 500ml of methanol dropwise to obtain flocs, filter The above-mentioned flocs were put into an oven and dried for 20 hours under the condition of 80° C. to obtain the polyurethane powder containing graphene;

[0034] (2) Measure 4.44g of graphene in water dispersion, put it in 200ml of acetone solvent, oscillate ultrasonically for 20min, and spray (combining air compressor and vacuuming, ...

Embodiment 3

[0037] The preparation method of the gradient graphene / polyurethane conductive composite material of the present embodiment, the steps are as follows:

[0038](1) Choose DMF as the organic solvent, weigh 3g of TPU pellets, put them in 70ml of DMF solvent, and stir for 35min at a temperature of 40°C; according to the proportion of 0.4wt%, measure 2.677g of graphene in water dispersion , also put in 20ml of DMF solvent, ultrasonic 10min. Mix the two solutions, and clean the graphene DMF beaker with 10ml of DMF solution, and then sonicate again for 30min after stirring; after the mixed solution is cooled, add 500ml of methanol dropwise to obtain flocs, filter the flocs, and put them under the condition of 80°C. Dry 20h in oven, obtain the polyurethane powder that contains graphene;

[0039] (2) Measure 4.44g of graphene in water dispersion, put it in a quantitative 200ml acetone solvent, oscillate ultrasonically for 20min, and spray it on the melt-blown polyurethane non-woven fa...

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Abstract

The invention discloses a preparation method of a gradient graphene / polyurethane conductive composite material. The preparation method comprises 1, graphene-containing polyurethane powder preparation, 2, graphene / polyurethane non-woven fabric film or nanometer clay tube / polyurethane non-woven fabric film preparation and 3, gradient graphene / polyurethane conductive composite material preparation. The preparation method prevents graphene agglomeration in blending. The surface of the polyurethane non-woven fabric is spray-coated with graphene with excellent electrical conductivity and a 3D conductive network structure gradient graphene / polyurethane conductive composite material layer is formed on the film surface so that high mechanical properties and a low permeability value are realized. Compared with the prior art, the preparation method realizes one-step molding and has simple processes. The preparation method can produce the gradient graphene / polyurethane conductive composite material with high mechanical properties and a low permeability value.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a preparation method of a gradient graphene / polyurethane conductive composite material with higher mechanical properties and lower percolation value. Background technique [0002] Graphene is a kind of SP 2 A new carbonaceous material with a two-dimensional honeycomb network lattice structure formed by hybridized carbon atoms, graphene was first prepared by physicists Andre Geim and Konstantin Novoselov in "Science" in 2004. Due to its unique two-dimensional structure and excellent performance [such as: single-layer sheet-like two-dimensional graphene has a high specific surface area of ​​2630m 2 / g, high conductivity (carrier mobility at room temperature is about 10000cm 2 / V s) and excellent mechanical properties (Young's modulus 1TPa) and thermal conductivity (thermal conductivity of 3000~5000W / m k)] and relatively low cost, it is very suitable for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/10B32B37/06C08L75/04C08K3/04D06M11/74D06M101/30
CPCB32B37/06B32B37/10C08K3/04D06M11/74D06M2101/30C08L75/04
Inventor 张娜吕广超董梦瑶鲁智力刘春太
Owner ZHENGZHOU UNIV
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