Conductive polymer composite and preparation method thereof

A conductive polymer and composite material technology, which is applied in the field of conductive polymer composite materials and its preparation, can solve the problems of complex processing technology, high cost, and decreased mechanical properties of materials

Active Publication Date: 2013-05-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The Chinese patent with the publication number CN 102061028A discloses a method for preparing a conductive polymer composite material with low percolation value. In this method, carbon black (CB) is mixed with polyethylene (PE), and then the CB/PE mixture is mixed with polyethylene (PE). Ethylene terephthalate (PET) is processed by extrusion, ...

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  • Conductive polymer composite and preparation method thereof
  • Conductive polymer composite and preparation method thereof
  • Conductive polymer composite and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a method for preparing a conductive polymer composite material, comprising the following steps: A) heating and co-polymerizing the polymer with poor affinity with the conductive nano-filler in the incompatible polymer blend system and the conductive nano-filler; mixed to obtain a premix; B) heating and blending the premix with the polymer with better affinity with the conductive nanofiller in the incompatible polymer blend system, and the two polymers form a bicontinuous structure, A conductive polymer composite material is obtained; the amount of the incompatible polymer blend system is 100 parts by weight, the amount of the conductive nano filler is 0.01 to 1.5 parts by weight, and the aspect ratio of the conductive nano filler is ≥ 100.

[0040] Wherein, the incompatible polymer blend system is the same as that of the conductive nanofiller, and will not be repeated here.

[0041]The blending temperature in step A is 170-218° C., pr...

Embodiment 1

[0052] 1.1 Blend 0.01 parts by weight of carbon nanotubes and 50 parts by weight of polylactic acid in an internal mixer at a temperature of 180° C., a rotation speed of 120 r / min, and a blending time of 5 minutes to obtain a premix.

[0053] 1.2 Blend 50 parts by weight of polycaprolactone with the premix obtained in 1.1 in an internal mixer, the blending temperature is 180°C, the rotation speed is 50r / min, and the blending time is 4min to obtain a conductive polymer compound Material.

[0054] Utilize the transmission electron microscope to test the conductive polymer composite material obtained in 1.2, and obtain the transmission electron microscope photos of different magnification ratios, such as Figure 2-4 shown, where image 3 for figure 2 A partial enlargement of the Figure 4 for image 3 A partial enlargement of the .

[0055] The conductive polymer composite material obtained in 1.2 was tested using a broadband dielectric impedance spectrometer (Concept80...

Embodiment 2

[0057] 2.1 Blend 0.02 parts by weight of carbon nanotubes and 50 parts by weight of polylactic acid in an internal mixer at a temperature of 180° C., a rotation speed of 120 r / min, and a blending time of 5 minutes to obtain a premix.

[0058] 2.2 Blend 50 parts by weight of polycaprolactone with the premix obtained in 2.1 in an internal mixer, the blending temperature is 180°C, the rotation speed is 50r / min, and the blending time is 4min to obtain a conductive polymer compound Material.

[0059] The conductive polymer composite material obtained in 2.2 was tested with a broadband dielectric impedance spectrometer (Concept80), and its electrical conductivity (conductivity at a frequency of 0.1 Hz) is shown in Table 1.

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Abstract

The invention provides a conductive polymer composite and a preparation method thereof. The conductive polymer composite comprises 100 parts by weight of matrix and 0.01-1.5 parts by weight of conductive nanofiller, wherein the matrix is an incompatible polymer blend system with dual-continuous structure, and the length-diameter ratio of the conductive nanofiller is greater than or equal to 100. Compared with a conductive fibering polymer composite prepared from carbon black, polyethylene and polyethylene terephthalate in the prior art, the conductive polymer composite has the advantages that firstly, the length-diameter ratio of the conductive nanofiller adopted in the conductive polymer composite is larger, so that the insulated polymer can conduct electricity by few addition of the conductive nanofiller, thus the conductive percolation threshold of the conductive polymer composite is reduced; secondly, the matrix of the dual-continuous structure and the conductive polymer nanofiller are distributed on a two-phase interface of the incompatible polymer blend system with the dual-continuous structure, so that the conductive percolation threshold of the conductive polymer composite is reduced; and finally, the preparation method provided by the invention is simple, safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a conductive polymer composite material and a preparation method thereof. Background technique [0002] Conductive polymer composite materials are based on structural polymer materials (continuous phase), and various conductive substances (such as carbon systems, metals, metal oxides, structural conductive polymers, etc.), through dispersion compounding, layering Materials with electrical conductivity formed by compounding, surface compounding or gradient compounding. Since the 1980s, conductive polymer composite materials have gradually become a hot research direction in the field of polymer science, and they are also widely used in antistatic materials, electromagnetic wave shielding materials, wave absorbing materials, temperature and current control materials, sensors, etc. , energy materials and other fields. [0003] In conductive polymer composites,...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L23/12C08L77/00C08L77/02C08L23/08C08L25/06C08K7/00C08K3/04C08K7/06H01B1/24
Inventor 朱雨田黄金瑞姜伟毛萃
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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