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CNT (carbon nano tube)/macromolecule composite film and preparation method thereof

A carbon nanotube film and carbon nanotube technology, which is applied in the field of carbon nanotube/polymer composite film and its preparation, can solve the problems that composite materials cannot give full play to the electrical and mechanical properties of carbon nanotubes and poor mutual contact, and achieve The preparation method is simple and easy to operate, the thickness is controllable, and the effect of low cost

Inactive Publication Date: 2012-05-09
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, CN 100488758C discloses a method for preparing a carbon nanotube / epoxy resin composite material, in which carbon nanotubes are uniformly dispersed in an epoxy resin solution, and the carbon nanotube / epoxy resin composite material is obtained after curing. As a bulk material, due to the large distance between adjacent carbon tubes and poor mutual contact, the composite material prepared by this method cannot give full play to the electrical and mechanical properties of carbon nanotubes.

Method used

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  • CNT (carbon nano tube)/macromolecule composite film and preparation method thereof
  • CNT (carbon nano tube)/macromolecule composite film and preparation method thereof
  • CNT (carbon nano tube)/macromolecule composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1 The technical scheme of this embodiment is: weigh 3mg carbon nanotubes and 100mg sodium dodecylbenzenesulfonate, add 60ml water, ultrasonically disperse for 2-6 hours, preferably 3 hours, centrifuge, keep the supernatant; take the supernatant (that is, the carbon nanotube dispersion) is filtered through the mixed fiber porous filter membrane to form a carbon nanotube membrane, and then the porous filter membrane is dissolved to obtain a self-supporting carbon nanotube membrane, which is washed repeatedly with water to remove the surfactant.

[0034] Take epoxy resin E-44 and curing agent polyetheramine and dissolve them in acetone at a mass ratio of 5:2 to prepare a 2wt% epoxy resin pre-curing solution.

[0035] Spin-coat a layer of chitosan film on the glass sheet as a sacrificial layer, spread the aforementioned carbon nanotube film on it after drying, let it dry, and then dip the glass sheet covered with the carbon nanotube film in the above-mentioned epox...

Embodiment 2

[0037] Example 2 The technical scheme of this embodiment is: weigh 3mg carbon nanotubes, 200mg sodium dodecylsulfonate, add 30ml water, ultrasonically disperse for 5 hours, centrifuge, keep the supernatant, take the supernatant and pass it through anodized aluminum microporous filter The membrane is suction-filtered into a carbon nanotube membrane, and then the porous filter membrane is dissolved to obtain a self-supporting carbon nanotube membrane, which is washed repeatedly with water to remove the surfactant.

[0038] Take epoxy resin E-51 and trimethylhexamethylenediamine and dissolve them in ethanol at a mass ratio of 3:1 to prepare a 3wt% epoxy resin pre-curing solution.

[0039] Spin-coat a layer of cellulose acetate film on the glass sheet as a sacrificial layer, spread the carbon nanotube film on it after drying, and then immerse the glass sheet covered with the carbon nanotube film in the above epoxy resin pre-curing solution Then take it out and solidify at room t...

Embodiment 3

[0040] Example 3 The technical scheme of this embodiment is: weigh 3mg carbon nanotubes, 60mg polyoxyethylene lauryl alcohol, add 100ml water, ultrasonically disperse for 4 hours, centrifuge, keep the supernatant, take the supernatant and pump it through the polyethersulfone microporous filter membrane Filtrate into a carbon nanotube membrane, and then dissolve the porous filter membrane to obtain a self-supporting carbon nanotube membrane, which is washed repeatedly with water to remove the surfactant.

[0041]A 5wt% PVDF solution was prepared by dissolving polyvinylidene fluoride (PVDF) in N-methylpyrrolidone.

[0042] Spin-coat a layer of chitosan film on the glass sheet as a sacrificial layer, spread the carbon nanotube film on it after drying, and then immerse the glass sheet covered with the carbon nanotube film in PVDF, take it out, 60 ℃ vacuum drying. Then soak in 1wt% acetic acid aqueous solution to dissolve the chitosan sacrificial layer, and wash repeatedly with ...

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Abstract

The invention discloses a preparation method of a CNT (carbon nano tube) / macromolecule composite film. The composite film comprises a framework network made of a CNT film and filled and coated with a macromolecular material; moreover, the composite film can be as thin as 100nm. The preparation method of the composite film comprises the following steps of: laying the CNT film on a solid substrate with a sacrificial layer on the surface; soaking the CNT film with a macromolecular solution; laying the solid substrate horizontally; removing the sacrificial layer after the macromolecular solution is solidified or dried; and separating the formed CNT (carbon nano tube) / macromolecule composite film from the solid substrate to finally obtain the target product. The composite film disclosed by the invention has the advantages of uniform shape, thickness controllable between 100nm and dozens of microns, good transmittance and high mechanical strength; moreover, the preparation method is simple, easy to operate and low is cost. The CNT / macromolecule composite film and the preparation method thereof have wide application prospect in the fields of electrostatic prevention, electromagnetic shielding, microwave absorbing, heat conduction and transfer and the like.

Description

Technical field [0001] The present invention involves a carbon nanotuba composite material and its preparation method, especially a carbon nanotuba / polymer composite film and its preparation method formed by the network structure supported by the carbon nanotrane film. Background technique [0002] Since the discovery of carbon nanotubes, it has attracted great interest in academic and industry.Carbon nanotubes have the characteristics of high ratio and high long diameter ratio, excellent mechanics and electrical properties, and strong acid -resistant alkali and other characteristics. They are considered ideal fillings for composite materials.Therefore, it is of great significance to enhance polymer materials with carbon nanopardium to enhance polymer materials or improve the conductivity of polymer materials, thereby expanding the application field of polymer materials.Carbon nanotubes have a lot of research on the polymer, but the method of scattered carbon nanotubes in the pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/12C08L63/00C08L27/16C08L5/08C08L79/08C08K7/00C08K3/04C08J5/18
Inventor 靳健李艳香
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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