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Method for making carbon nano tube/polystyrene composite conductive material

A technology of carbon nanotubes and polystyrene, which is applied in the field of semiconductor technology, can solve problems such as mechanical properties, optical transparency comprehensive performance, destruction of polymer material structure and properties, polymer chain damage, etc., to improve purity, The effect of reducing production costs and avoiding damage

Inactive Publication Date: 2010-12-01
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has achieved certain innovations, but there are still two shortcomings in terms of its implementation process: 1) The carbon tube dispersion process adds surfactants or coupling agents to aid dispersion, and finally introduces Impurities will inevitably affect the mechanical properties, optical transparency and other comprehensive properties of the material; 2) Ultrasonic treatment after polymer dissolution, the ultrasonic action will cause damage to the polymer chain, or even break it, and then destroy the structure of the polymer material itself and nature

Method used

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  • Method for making carbon nano tube/polystyrene composite conductive material
  • Method for making carbon nano tube/polystyrene composite conductive material
  • Method for making carbon nano tube/polystyrene composite conductive material

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preparation example Construction

[0029] The invention provides a preparation method of a polystyrene composite conductive material containing carbon nanotubes. The method comprises the following steps: configure a polystyrene solution with a lower concentration with a specific solvent, and disperse the carbon nanotubes by wrapping the carbon nanotubes with polystyrene (without adding any carbon nanotube dispersant); For the required ratio, use the same solvent to configure a polystyrene solution with a higher concentration; mix the two dispersions evenly; add the mixture to another solvent, and the carbon nanotubes and the carbon nanotubes wound on the carbon nanotubes Polystyrene precipitated simultaneously; the resulting solid composite sample was collected by filtration.

[0030] Wherein: the solute concentration of the low-concentration polystyrene solution configured in the first step is between 0.1 to 4 wt%, and the concentration of the dispersed carbon nanotubes is 0.1 to 3 wt%; the polystyrene solutio...

Embodiment 1

[0034] Such as figure 1 Shown is a schematic flow chart of the preparation method of the carbon nanotube / polystyrene composite conductive material of the present invention, comprising the following steps:

[0035] In step 1, a matrix material polystyrene is used as a dispersant to provide a uniform and stable dispersion of carbon nanotubes. Firstly, polystyrene is fully dissolved in DMF (N, N-dimethylformamide) solvent, and the proportioning concentration is 2%. Then add 0.2% carbon nanotube powder therein, and 100W ultrasonic treatment for 4 hours, and then a uniformly dispersed carbon nanotube dispersion 1 can be obtained.

[0036] Step 2, fully dissolving solid polystyrene in DMF solvent to obtain polystyrene solution 2 with a proportioning concentration of 5%.

[0037] In step 3, according to the content of carbon nanotubes in the required composite material, appropriate amounts of the two dispersions in step 1 and step 2 are respectively taken and mixed. Under the acti...

Embodiment 2

[0041] Fully dissolve polystyrene block copolymer ABS in DMF (N, N-dimethylformamide) solvent, the proportioning concentration is 2%, then add 0.2% carbon nanotube powder therein, 100W ultrasonic treatment After 4 hours, a uniformly dispersed carbon nanotube dispersion A was obtained. Add ABS to another part of DMF solvent, stir to make it fully dissolved, and the proportioning concentration is 5%, to obtain solution B. After mixing liquid A and liquid B, continue to stir for half an hour, pour the mixed liquid into deionized water stirred at high speed, let it stand for a period of time, and then filter and dry to obtain the required composite conductive sample.

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Abstract

The invention discloses a method for making a carbon nano tube / polystyrene composite conductive material, which comprises the following steps of: firstly, preparing low-concentration solution of polystyrene by using a specific solvent and dispersing carbon nanotubes by using the solution of polystyrene; secondly, preparing another solution of polystyrene by using the same solvent according to the formula of the composite material, and uniformly mixing the two parts of solution; thirdly, adding a solvent, which is soluble with the solvent of the solution of polystyrene and not soluble with the polystyrene, into the mixed solution; and finally, obtaining the solid electro-conductive composite by filtering, collecting or drying. In the invention, the carbon nanotubes can be uniformly and stably dispersed by the chain winding of a polystyrene matrix material, the pi-pi interaction and the like, no auxiliary dispersing agents are added, and the post-chemical decoration dispersion is not used, so that the damages of ultrasonic treatment to the matrix are avoided, the basic structure and the performance of the matrix material are kept, and meanwhile, the purity of the composite is greatly improved. The making method of the invention has a simple operation process and obviously saves cost.

Description

technical field [0001] The invention relates to the field of semiconductor technology, in particular to a method for manufacturing a nano-array structure solar battery based on semiconductor materials, which can significantly improve the III-group nitride nano-array structure. Background technique [0002] Nanocomposite materials refer to a type of composite materials in which the dispersed phase has at least one dimension less than 100nm in three dimensions, and is one of the most active frontier fields in materials science in the world today. It has a unique nano-scale dispersed microstructure, which perfectly combines the advantages of its different components at the nano-scale, thus exhibiting excellent performance that is difficult to achieve with a single component and conventional micro-composite materials. However, among polymer / inorganic composites, polymer / clay and polymer / carbon nanotube nanocomposites are currently the most studied. Adding nanoclay to plastic ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L51/04C08L25/12C08L53/02C08L9/06C08L55/02C08K7/00C08K3/04C08K9/04H01B1/24
Inventor 周振平孟凡成李清文陈名海
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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