Novel low filling conducting composite material and preparation method thereof

A conductive composite material, low-filling technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of reduced mechanical properties of matrix materials, ineffective dispersion, large differences in compatibility and density, and achieve molding The process is simple and easy to operate, good comprehensive physical properties, and the effect of reducing the conductive percolation value

Inactive Publication Date: 2015-05-20
GUANGXI LISHENG STONE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest problem that plagues or hinders this type of material is that a relatively high filling amount is required to achieve a more ideal conductive effect, that is, a relatively high conductive percolation value, which is mainly due to the compatibility and compatibility between these fillers and the polymer matrix. The difference in density is large, resulting in ineffective dispersion, and the result of high filling will inevitably lead to a large decrease in the mechanical properties of the matrix material while causing high costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 40 parts of polyethylene terephthalate (U.S. DuPont, 415HPNC), 10 parts of EPDM rubber (Keltan 1446A), unmodified diameter of 10-20nm, length of 20-30μm multi-walled carbon nanotubes 0.05 Parts (Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences), added to the torque rheometer for mixing. The kneading temperature is 275° C., and the screw speed is 90 r / min. The mixing time was 10 minutes. The obtained sample was hot-pressed to form a film at 275° C., and the resistivity of the sample was measured. The values ​​are shown in Table 1.

Embodiment 2

[0030] 40 parts of polytrimethylene terephthalate (US Shell, intrinsic viscosity 0.9dL / g), 10 parts of isoprene rubber (NIPOL, Japan), unmodified diameter 10-20nm, length 20-30μm 2.5 parts of multi-walled carbon nanotubes (Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) were added into a torque rheometer for mixing. The kneading temperature is 240° C., and the screw speed is 60 r / pm. The mixing time was 10 minutes. The obtained sample was hot-pressed to form a film at 240° C., and the resistivity of the sample was measured. The values ​​are shown in Table 1.

Embodiment 3

[0032] 40 parts of polybutylene terephthalate (US GE, 310SE0-BK), 10 parts of nano-terminal carboxylated nitrile rubber (US, CTBN 1300X8F), unmodified diameter 10-20nm, length more than 20-30μm 1 part of walled carbon nanotubes (Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) was added to a torque rheometer for mixing. The mixing temperature is 245° C., and the screw speed is 60 r / pm. The mixing time was 10 minutes. The obtained sample was hot-pressed to form a film at 245° C., and the resistivity of the sample was measured. The values ​​are shown in Table 1.

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Abstract

The invention relates to a novel low filling conducting composite material and a preparation method thereof. The composite material comprises the following components in parts by weight: 100 parts of matrix and 0.1-5 parts of carbon nano tubes (CNTs), wherein the matrix is prepared by compounding aromatic polyester and rubber or thermoplastic elastomer at a weight ratio of 1:(0.25-4). The low filling conducting composite material prepared by the invention adopts the performance-complementary and incompatible polymer as the matrix, wherein the mixed matrix has good comprehensive physical properties especially mechanical properties; CNTs are selectively dispersed in one of the matrices as conducting particles to form a conductive channel, thus greatly reducing the conducting percolation value; and the selected molding process is simple and easy to operate, and is convenient for large-scale production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a conductive composite material and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the improvement of living standards, the requirements for conductive materials in various household or industrial electronics, electrical appliances, and automatic control fields are increasing. Lightweight and miniaturization of these instruments or equipment is becoming a development trend. Although metal Metals such as silver, copper, and aluminum have good electrical conductivity, but their application range is severely limited due to their high specific gravity and high price. The polymer has the advantages of low specific gravity and easy processing, but its volume resistivity is generally 10 10 ~10 20 Between Ω / cm, it has been used as an insulating material for a long time. Turning light-weight, easy-to-process polymers into ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08L67/02C08L9/02C08L9/00C08L23/16C08L13/00C08L23/08C08K7/00C08K3/04C08K9/00H01B1/24B29C43/58
Inventor 陈珍明
Owner GUANGXI LISHENG STONE CO LTD
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