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Method for preparing crystal polymer/carbon nano-tube conductive composite material

A technology of carbon nanotubes and composite materials, which is applied in the field of polymer material preparation, can solve the problems of large cost, complicated operation steps, and inapplicability to large-scale industrial production, so as to reduce usage, increase effective concentration, and improve mixing efficiency Effect

Inactive Publication Date: 2008-06-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can reduce the amount of carbon nanotubes used to a certain extent, they all have disadvantages and certain limitations such as complicated operation steps, consuming a large amount of solvent, and being unsuitable for large-scale industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: 23.7g (79%, namely percentage by weight, the same below) polypropylene (Beijing Yanhua Petrochemical Co., Ltd., S1003), 0.3g (1%) multi-walled carbon nanotubes (Green Reaction Engineering of Tsinghua University The laboratory provides) and 6g (20%) calcium carbonate (Beijing Guoli Superfine Powder Co., Ltd., 1250 mesh), add in the torque rheometer (Harbin Hapu Electric Technology Co., Ltd., RH-200A) and carry out kneading. The kneading temperature is 200° C., and the screw speed is 60 r / pm. The mixing time was 10 minutes. The obtained sample was hot-pressed at 230°C to form a film, and the resistivity of the sample was measured and the logarithm value of the resistivity was calculated. The values ​​are shown in Table 1.

Embodiment 2

[0021] The amount of polypropylene in Example 1 was changed to 20.7 g (69%), and the calcium carbonate was changed to 9 g (30%). The preparation method and test method are the same as in Example 1, and the values ​​are shown in Table 1.

Embodiment 3

[0023] Change the calcium carbonate in Example 1 into the same amount of talcum powder (Beijing Guoli Superfine Powder Co., Ltd., 1250m), the preparation method and test method are the same as in Example 1, and the values ​​are as shown in Table 1.

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Abstract

The present invention relates to a preparation method of crystal polymer / carbon nano-pipe conductive composite material. The method is characterized in that crystal polymer, carbon nano-pipe and inorganic powder are mixed according to a certain proportion and then the processing equipment of macromolecular material is adopted for fusing, mixing and completing the granulation. The present invention with simple method and easy operation can obtain the conductive composite material with good electric conduction and good comprehensive performance through one-step method, and can be applied in the fields of automobile, electric and electronic instrument, office equipment and industrial machinery. The present invention can meet and expand the requirements of crystal macromolecular material for various purposes.

Description

technical field [0001] The invention relates to a method for preparing a conductive composite material, in particular to a conductive composite material prepared by using polymer materials, carbon nanotubes and inorganic powders, and belongs to the technical field of polymer material preparation. Background technique [0002] With the development of the electronic industry and information technology, the requirements for the performance of polymer materials are getting higher and higher. In addition to the properties of the polymer material itself, in some cases the material is also required to have certain electrical properties to meet the needs of conductive materials, antistatic materials, electromagnetic shielding materials, and planar heating materials. So far, people usually use carbon materials such as carbon black, graphite, and carbon fiber as conductive fillers to prepare various conductive composite materials. In recent years, with the advancement of nanoscience ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08K3/00
Inventor 于建鲍哈达郭朝霞
Owner TSINGHUA UNIV
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