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Carbon nanotube three-dimensional network architecture and polymer composite material thereof, and preparation methods thereof

A carbon nanotube and three-dimensional network technology, applied in the field of preparation of functional composite materials, can solve the problems of high cost and inability to popularize mass production, and achieve the effects of low cost, novel preparation ideas and simple operation

Active Publication Date: 2015-08-26
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing application has the graphene foam of three-dimensional connected network structure as the conductive polymer composite material (referring to CN102732037A) that additive is prepared, and its graphene foam is disordered porous structure, as figure 1 As shown, and the cost of its production method CVD method is high, the inability to popularize mass production is its biggest defect

Method used

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  • Carbon nanotube three-dimensional network architecture and polymer composite material thereof, and preparation methods thereof
  • Carbon nanotube three-dimensional network architecture and polymer composite material thereof, and preparation methods thereof
  • Carbon nanotube three-dimensional network architecture and polymer composite material thereof, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation of the carbon nanotube three-dimensional network macroscopic body comprises the following steps:

[0043] Step 1. Add deionized water to the carbon nanotube aqueous dispersion, and perform ultrasonic dispersion for 30 minutes, so that the carbon nanotubes are uniformly dispersed in water to obtain a carbon nanotube dispersion; the carbon nanotube content in the carbon nanotube dispersion is 1wt.%. . ;

[0044] Step 2. Pour the above-mentioned carbon nanotube dispersion into a polypropylene plastic tube with a diameter of 1.5 cm and a height of 8 cm, and gradually immerse the plastic tube in liquid nitrogen at a speed of 6 mm / min until the dispersion is completely frozen into ice;

[0045] Step 3, put the above-mentioned frozen ice and the mold together into a freeze dryer and freeze-dry for 48 hours until the ice is completely sublimated to obtain a three-dimensional network macroscopic body of carbon nanotubes, such as figure 1 As shown, the scanning ...

Embodiment 2

[0047] The preparation method of carbon nanotube / bisphenol F epoxy resin composite material with three-dimensional continuous skeleton structure:

[0048] 1. Preparation of bisphenol F epoxy resin precursor: weigh 20g of bisphenol F epoxy resin (NPEF-170) and 6g of diaminodiphenylmethane (DDM) curing agent, mix the two, and vigorously Stir for about 10 minutes until uniformly mixed, and then remove air bubbles in a vacuum environment for 5 minutes to obtain a bisphenol F epoxy resin precursor;

[0049] 2. Mixing: Put the carbon nanotube macroscopic body prepared in Example 1 into the mold, and then drop the above-mentioned bisphenol F epoxy resin precursor solution at 80°C according to the volume ratio of 1:1 to make it penetrate and fully infiltrate Carbon nanotube macroscopic body, a mixture;

[0050] 3. Vacuum treatment: Vacuum the above mixture for 2 hours to remove the air bubbles, so that the resin precursor can be better filled into the pores of the carbon nanotube net...

Embodiment 3

[0054] The preparation of the carbon nanotube three-dimensional network macroscopic body comprises the following steps:

[0055] Step 1. Add deionized water to the carbon nanotube aqueous dispersion, and perform ultrasonic dispersion for 30 minutes, so that the carbon nanotubes are uniformly dispersed in water to obtain a carbon nanotube dispersion; the carbon nanotube content in the carbon nanotube dispersion is 3wt.%. .

[0056] Step 2. Pour the above-mentioned carbon nanotube dispersion into a polypropylene plastic tube with a diameter of 1.5 cm and a height of 8 cm, and gradually immerse the plastic tube in liquid nitrogen at a speed of 6 mm / min until the dispersion is completely frozen into ice;

[0057] Step 3: put the above-mentioned frozen ice and the mold together into a freeze dryer and freeze-dry for 48 hours until the ice is completely sublimated to obtain a carbon nanotube three-dimensional network macroscopic body.

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Abstract

The invention discloses a carbon nanotube three-dimensional network architecture and a preparation method thereof, and a carbon nanotube / polymer composite material prepared from the carbon nanotube three-dimensional network architecture and having a three-dimensional continuous skeleton structure and a preparation method thereof. The architecture is a three-dimensional network body formed by interconnection of sheet layers composed of carbon nanotubes, and the proportion of the carbon nanotube in the composite material is 0.1 to 10 wt%. The carbon nanotube / polymer composite material with the three-dimensional continuous skeleton structure is constructed by preparing the carbon nanotube architecture with a three-dimensional network by using directional freezing technology, then mixing the carbon nanotube architecture with a polymer and carrying out curing. According to the invention, the carbon nanotube three-dimensional network architecture capable of realizing independent support is used as a conductive additive for a polymer matrix to construct a three-dimensional communicated conductive network in the composite material; and in virtue of good intrinsic conductivity of the carbon nanotube architecture and the characteristics of the inner three-dimensional continuous structure, the conductivity of the polymer composite material is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional composite materials, and relates to a three-dimensional network macroscopic body of carbon nanotubes, a polymer composite material thereof and a preparation method thereof. Background technique [0002] Polymer-based composite materials are increasingly used in aerospace, electronics and electrical fields, and are expected to replace metal materials and become the main manufacturing materials for a new generation of advanced equipment. However, in practical engineering applications, due to the non-metallic structure and functional characteristics of polymer matrix composites, some problems are also brought about, especially the problem of insufficient electrical conductivity. For example, in the resin-based composite materials widely used in modern aircraft, due to the electrical insulation of polymers, the resin-rich layer presents the characteristics of high resistance, which b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 严佳吴天昊李小康丁泽尊武湛君
Owner DALIAN UNIV OF TECH
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