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Oriented carbon nanotube/polyolefin composite material and preparation method thereof

A technology of oriented carbon nanotubes and composite materials, applied in the field of oriented carbon nanotubes/polyolefin composite materials and its preparation, can solve the problems of high production cost, complicated preparation process, unsuitable for large-scale continuous production, etc., and achieve enhanced toughness , Increase the effect of the interface

Active Publication Date: 2014-10-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above method prepares carbon nanotube / polyolefin composite materials by chemically modifying nanotubes, such as adding a compatibilizer, or by means of a two-step method of physical blending and then shearing in a strong field, although to a certain extent The performance of the polymer matrix has been improved, but there are disadvantages such as complex preparation process, high energy consumption, high production cost, and it is not suitable for large-scale continuous production

Method used

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  • Oriented carbon nanotube/polyolefin composite material and preparation method thereof
  • Oriented carbon nanotube/polyolefin composite material and preparation method thereof
  • Oriented carbon nanotube/polyolefin composite material and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a method for preparing an aligned carbon nanotube / polyolefin composite material, comprising the following steps:

[0037] Mix 100 parts by mass of polyolefin, 0.001 to 10 parts by mass of carbon nanotubes, 0.001 to 2 parts by mass of a free radical initiator and 0.01 to 5 parts by mass of a free radical scavenger to obtain a mixture, wherein the free radical The capture agent is a compound containing benzene ring or heterocycle;

[0038] The mixture is melt-blended and shaped to obtain an aligned carbon nanotube / polyolefin composite material.

[0039] In the present invention, 100 parts by mass of polyolefin, 0.001-10 parts by mass of carbon nanotubes, 0.001-2 parts by mass of a free radical initiator and 0.01-5 parts by mass of a free radical scavenger containing a benzene ring or a heterocycle are mixed , to obtain a mixture. The present invention has no special limitation on the mixing method, and the mixing can be carried out in...

Embodiment 1～5

[0047] According to the ratio of raw materials shown in Table 1, the aligned carbon nanotube / polyolefin composite material was prepared according to the following method:

[0048] Each raw material was stirred evenly in a high-speed mixer at a speed of 300 rpm, and then sent to an internal mixer for melt blending. The mixing temperature was 180°C, the mixing time was 8 minutes, and the rotation speed was 60 rpm; The mixture obtained after kneading was thermocompressed under the conditions of 190° C. and 10 MPa to prepare sheets with a thickness of 1 mm and 4 mm, respectively.

[0049] The sheet with a thickness of 1 mm was frozen and ultrathin sectioned for transmission electron microscope observation, the results can be found in figure 1 , figure 1 The transmission electron micrograph of the composite material that is the embodiment of the present invention 1 provides, by figure 1 It can be seen that, in the composite material provided by the present invention, the carbon n...

Embodiment 6

[0052] According to the ratio of raw materials shown in Table 1, the aligned carbon nanotube / polyolefin composite material was prepared according to the following method:

[0053] After each raw material is stirred evenly in a high-speed mixer at a speed of 1000 rpm, it is sent into a twin-screw extruder for melt blending. The processing temperature conditions of the twin-screw extruder are: feeding zone 170 ° C ~ 200 ° C , The reaction zone is 190°C to 240°C, the extrusion zone is 200°C to 220°C; the twin-screw speed is 300 rpm.

[0054] The composite material obtained after extrusion granulation was injection-molded on an injection testing machine under the conditions of 170°C to 200°C and 10MPa to 20MPa to obtain dumbbell samples with a thickness of 3.2mm, a length of the thin neck part of 150mm, and a width of 10mm. Bar and thickness are 4mm, long 150mm, wide 20mm rectangular spline, tensile test is carried out to described dumbbell-shaped spline; 4mm deep V-shaped notch i...

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Abstract

The invention provides an oriented carbon nanotube / polyolefin composite material, which is prepared by melt blending of 100 weight parts of polyolefin, 0.001-10 weight parts of carbon nanotube, 0.001-2 weight parts of radical initiator and 0.01-5 weight parts of free radical scavenger, wherein the free radical scavenger free radical scavenger is a compound containing benzene ring or heterocycle. The invention also provides a preparation method of the carbon nanotube / polyolefin composite material. According to the invention, the radical initiator and the free radical scavenger containing benzene ring or heterocycle can enhance interface effect between the carbon nanotube and polyolefin, so as to realize uniform disperse and oriented arrangement of the carbon nanotube in the polyolefin matrix material, maintain good rigidity of the polyolefin as well as enhance toughness of the polyolefin.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an aligned carbon nanotube / polyolefin composite material and a preparation method thereof. Background technique [0002] Carbon nanotubes are one-dimensional nanomaterials with light weight, perfect hexagonal structure connections, and excellent mechanical, electrical, and heat transfer properties. Since their discovery in 1991, carbon nanotubes have been a research hotspot in the field of materials. In the modification of polymers, the preparation of polymer nanocomposites with carbon nanotubes as filling components is one of the effective ways to improve the comprehensive properties of polymers. However, carbon nanotubes are nanoparticles, which have the disadvantages of being difficult to uniformly disperse in the polymer matrix, easily forming agglomerates, and having poor interfacial interaction with the polymer matrix. Moreover, as a one-dimensional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/12C08K7/06C08K3/04
Inventor 唐涛王宇杰闻新万东
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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