Carbon nanotube modified thermoplastic resin and preparation method thereof

A carbon nanotube modification, thermoplastic resin technology, applied in the field of nanocomposite materials, can solve the problems of high equipment requirements, inability to realize industrial production, environmental pollution, etc., achieve large effective contact area, realize high volume filling, and simplify the process. The effect of the process

Inactive Publication Date: 2017-04-19
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Problems solved by technology

For another example, CN103426498A prepares carbon nanotube conductive paste by using N-methylpyrrolidone as a solvent, but uses a large amount of strong oxidizing acid or toxic organic solvent during functionalization of carbon nanotubes, which not only requires high equipment, but also Industrialized production cannot be realized, and it will cause environmental pollution

Method used

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  • Carbon nanotube modified thermoplastic resin and preparation method thereof
  • Carbon nanotube modified thermoplastic resin and preparation method thereof
  • Carbon nanotube modified thermoplastic resin and preparation method thereof

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preparation example Construction

[0030] In some preferred embodiments, see figure 1 As shown, the preparation method may include the following steps:

[0031] (1) Carrying out ball milling treatment to the mixture mainly composed of carbon nanotubes, functional additives, dispersants and solvents to obtain pretreated modified carbon nanotubes;

[0032] (2) Using a high-speed dispersion process to fully stir and mix the pretreated modified carbon nanotubes and thermoplastic resin powder to obtain a stable and dispersed carbon nanotube / resin mixture;

[0033] (3) After the carbon nanotube / resin mixture is dried, plastic modification additives are added, melted and extruded by a twin-screw machine, cooled and granulated, so as to obtain the carbon nanotube modified thermoplastic composite material.

[0034] More preferably, the mixed material comprises the following components calculated by weight percentage: 1.0% to 20% of carbon nanotubes, 20% to 30% of functional auxiliary agents, 0.01% to 1% of dispersants,...

Embodiment 1

[0052] Embodiment 1 The preparation method of the carbon nanotube modified thermoplastic resin specifically comprises the following steps:

[0053] 1) 400g of hydrogen peroxide solution, 100g of Nanocyl 7000 carbon nanotubes (provided by Belgian Nanocyl company), and 1000g of absolute ethanol are mixed (hydrogen peroxide solution accounts for 20% of the total mass of materials, and carbon nanotubes accounts for 20% of the total mass of materials 5.0% of the hydrogen peroxide solution accounts for 50% of the total mass of the material), using a star ball mill for ball milling, with a rotating speed of 300 rpm and a stirring time of 4 hours, to obtain pretreated modified carbon nanotubes, whose morphology can be found in figure 2 ;

[0054] 2) Stir the obtained pretreated modified carbon nanotubes and 1880g powder resin polyethylene terephthalate through a high-speed mixer for 2 hours to obtain a carbon nanotube resin mixture, and dry it;

[0055] 3) the carbon nanotube resin ...

Embodiment 2

[0056] Embodiment 2 The difference between this embodiment and Example 1 is that the carbon nanotube quality is 10.0g (the carbon nanotube accounts for 1.0% of the total mass of the material) in the step (1), and the carbon nanotube polyterephthalic acid The electrical conductivity of the ethylene glycol ester composite material is 1.44eS / m, and its morphology can be found in Figure 4 .

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Abstract

The invention discloses carbon nanotube modified thermoplastic resin and a preparation method thereof. The preparation method is as follows: mixing carbon nanotubes, a functional agent, a dispersing agent and a solvent for ball milling to obtain pretreated modified carbon nanotubes; using a high speed dispersion process for fully stirring and mixing the pretreated modified carbon nanotubes and thermoplastic resin powder to obtain a stably-dispersed carbon nanotube / resin mixture; drying the carbon nanotube / resin mixture, adding a plastic modified additive, and using a double screw extruder for melt extrusion and cooling granulation to obtain the target product. Through use of carbon nanotube functionalization and pre dispersion one-step treatment process, the process is greatly simplified; at the same time, the thermoplastic resin powder is used as a raw material to obtain effective mixing and dispersion of pretreated carbon nanotube powder, and then carbon nanotube high volume filling can be realized. The preparation method has the obvious advantages of simple process, environmental protection, low cost and the like, and is an effective preparation technology of a carbon nano tube functional master batch.

Description

technical field [0001] The invention particularly relates to a carbon nanotube modified thermoplastic resin and a preparation method thereof, belonging to the field of nanocomposite materials. Background technique [0002] Carbon nanotubes have excellent electrical, mechanical and thermal properties, and are ideal fillers for the preparation of composite materials. However, since carbon nanotube powder is usually composed of severely entangled carbon nanotube "particles", there is a strong van der Waals force between carbon nanotubes, coupled with its huge aspect ratio and specific surface area, it is difficult for carbon nanotubes to Effective dispersion in the polymer matrix limits its performance. [0003] At present, the industrial preparation method of carbon nanotube modified thermoplastic composites is mainly the melt blending method. This method is to melt and blend the carbon nanotubes and matrix resin through the shearing action of the twin-screw machine, and then...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L67/02C08K9/04C08K9/02C08K7/24
Inventor 陈名海程志杰金赫华李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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