Method for preparing high-ductility conductive polymer composite material

A conductive polymer and composite material technology, applied in the field of conductive polymer composite material preparation, can solve the problems such as toughness and ductility of isolation structure composite materials that are not consulted, and achieve the effects of easy industrial production operation, excellent impact performance, and easy implementation.

Active Publication Date: 2012-08-01
安徽瑞琦塑胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also no patent literature that uses a small amount of HDPE to fill primary high-conductivity particles made of high-content CNT as a conductive component to reinforce the toughness and ductility of isolation structure composites

Method used

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  • Method for preparing high-ductility conductive polymer composite material
  • Method for preparing high-ductility conductive polymer composite material
  • Method for preparing high-ductility conductive polymer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The main raw material is composed of the following components by weight percentage: UHMWPE 80%; HDPE 18%; CNT 2%.

[0039] The process steps adopt:

[0040] (1) Drying of raw materials: drying the CNTs in an oven at a constant temperature of 78° C. until the water content by weight is less than 0.01%.

[0041] (2) Preparation of CNT / HDPE conductive masterbatch: The obtained dry CNT and alcohol were formulated into a carbon nanotube alcohol suspension at a mass ratio of 1:50, and then uniform dispersion was achieved by ultrasonic and mechanical stirring for 15 minutes. At the same time, HDPE was dissolved in xylene at a mass ratio of 1:20, stirred, and mixed at 140° C. for 2 hours. Finally, pour the dispersed CNT into the dilute solution of HDPE and xylene to flocculate the CNT / HDPE mixture. Finally, it is vacuum filtered and dried in a vacuum oven at a constant temperature of 60°C until the moisture content is less than 0.01% by weight;

[0042] (3) Pulverization and...

Embodiment 2

[0046] Others are the same as in Example 1, the ratio of raw materials is UHMWPE 99%; HDPE 0.9%; CNT 0.1%, and the drying temperature of CNT is 80°C.

[0047] During the preparation of the CNT / HDPE conductive masterbatch in step (2), CNT and alcohol are dissolved in xylene at a mass ratio of 1:200; HDPE is dissolved in xylene at a mass ratio of 1:40. The drying temperature of the CNT / HDPE mixture is 60°C.

Embodiment 3

[0049] Others are the same as in Example 1, the ratio of raw materials is UHMWPE 89%; HDPE 9.9%; CNT 1.1%. In step (1), the CNT drying temperature is 79°C.

[0050] When preparing the CNT / HDPE conductive masterbatch in step (2), the mass ratio of CNT and alcohol is 1:400; HDPE is dissolved in xylene at a mass ratio of 1:50, and the drying temperature of the CNT / HDPE mixture is 60°C.

[0051] As a comparative example, the CNT / UHMWPE isolation structure composite material, its process route is as follows figure 1 Shown in (b), its preparation method is:

[0052] (1) Drying of raw materials: drying the CNTs in a vacuum oven at a constant temperature of 78° C. until the water content by weight is less than 0.01%.

[0053] (2) High-speed mixing: The pulverized CNT and dried UHMWPE particles were mixed and stirred at a high speed of 25,000 RPM for 4 minutes in proportion (keep the stirring temperature not exceeding 60°C) to complete the uniform coating of CNT on UHMWPE.

[0054] ...

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Abstract

The invention relates to a method for preparing a high-ductility conductive polymer composite material. Main raw materials of the composite material include, by weight, 80-99% of UHMWPE (ultrahigh molecular weight polyethylene), 0.9-18% of HDPE (high-density polyethylene) and 0.1-2% of CNT (carbon nano tube). The method includes the steps: (1) drying the raw materials; (2) preparing conductive parent stock of the CNT or HDPE; (3) crushing and granulating; (4) compositing and mixing; and (5) pressing to obtain a target product. Compared with a traditional conductive material of an isolation structure, the composite material prepared by the method has the advantages that the composite material has excellent impact property, the impact strength of the composite material is higher than 58.1KJ / m2, the fracture elongation of the composite material is 478%, the preparation process is simple, the technology is easy to control, production cost is low, and mass production is easily realized.

Description

technical field [0001] The invention relates to the technical field of preparation of conductive polymer composite materials, in particular to high-toughness carbon nanotube (hereinafter referred to as CNT) / high-density polyethylene (hereinafter referred to as HDPE) / ultra-high molecular weight polyethylene (hereinafter referred to as UHMWPE) conductive polymer composite The method of preparation of the material. Background technique [0002] Filled conductive polymer composites are widely used in the fields of antistatic, self-temperature control, current limiting and temperature limiting, and electromagnetic shielding (M.T.Byrne, et al. Adv. Mater. 2010, 22: 1672-1688.), so for The basic and applied research of conductive polymer composites is of great significance. The toughness and ductility of polymer materials are two important properties of conductive polymer composite materials, especially in the practical application of conductive polymer composite films and stress ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K7/00C08K3/04H01B1/24C08J3/22
Inventor 李忠明庞欢
Owner 安徽瑞琦塑胶科技有限公司
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