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Preparation method of polyaniline modified multi-wall carbon canotube/epoxy resin composite material

A technology of multi-walled carbon nanotubes and epoxy resin, which is applied in the treatment of fibrous fillers and dyed polymer organic compounds, etc., to achieve the effect of improving mechanical properties and strong interfacial interaction

Inactive Publication Date: 2011-01-26
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, it has not been found that polyaniline is used to modify multi-walled carbon nanotubes, and then prepare multi-walled carbon nanotubes / epoxy resin composites and obtain good strengthening and toughening effects.

Method used

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  • Preparation method of polyaniline modified multi-wall carbon canotube/epoxy resin composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) 0.2g dry surface with carboxyl multi-walled carbon nanotubes is added to 200ml (0.04mol / l) dodecylbenzenesulfonic acid solution, ultrasonically stirred for 0.5 hour; then 1 g (0.01mol) aniline is added dropwise in the above-mentioned suspension of multi-walled carbon nanotubes, the time for dropping is 1 hour, and then ultrasonically stirred for 1 hour; then 50ml (0.2mol / l) ammonium persulfate aqueous solution is added dropwise in the above-mentioned reaction system , the dropping time is 0.5 hours, and then continue to react for 2 hours until the end of the reaction. The above-mentioned whole polymerization reaction process is always carried out at a temperature of 35°C and under ultrasonic stirring, and then it is demulsified by acetone, washed with deionized water, and filtered by a microporous membrane. and drying to obtain polyaniline modified multi-walled carbon nanotubes;

[0020] (2) Add 1 g of the above-mentioned polyaniline-modified multi-walled carbon nan...

Embodiment 2

[0024] (1) Add 0.2g of dry multi-walled carbon nanotubes with carboxyl groups on the surface to 200ml (0.05mol / l) camphorsulfonic acid solution, and ultrasonically stir for 0.5 hours; then add 1g (0.01mol) aniline dropwise to the above-mentioned multi-walled carbon nanotubes In the carbon nanotube suspension, the dropping time is 1 hour, and then ultrasonically stirred for 1 hour; then 50ml (0.2mol / l) ammonium persulfate aqueous solution is added dropwise to the above reaction system, the dropping time is 0.5 hour, and then continue After reacting for 3 hours to the end of the reaction, the above-mentioned entire polymerization process is always carried out at a temperature of 35°C and under ultrasonic stirring, and then demulsified with acetone, washed with deionized water, filtered with a microporous membrane and dried to obtain a polyaniline modified polymer. Walled carbon nanotubes;

[0025](2) Add 5 g of the polyaniline-modified multi-walled carbon nanotubes to 50 ml of a...

Embodiment 3

[0027] (1) Add 0.2g of dry multi-walled carbon nanotubes with carboxyl groups on the surface to 200ml (0.05mol / l) p-toluenesulfonic acid solution, and ultrasonically stir for 0.5 hours; then add 1g (0.01mol) aniline dropwise In the above multi-walled carbon nanotube suspension, the dropping time is 1 hour, and then ultrasonically stirred for 1 hour; then 50ml (0.2mol / l) ammonium persulfate aqueous solution is added dropwise to the above reaction system, and the dropping time is 0.5 hour , and then continue to react for 4 hours until the end of the reaction. The above-mentioned whole polymerization process is always carried out at a temperature of 35°C and under ultrasonic stirring, and then filtered through a microporous membrane, washed with deionized water and dried to obtain polyaniline modified multi-wall carbon nanotubes;

[0028] (2) Add 10 g of the above-mentioned polyaniline-modified multi-walled carbon nanotubes into 50 ml of tetrahydrofuran, stir ultrasonically for 1...

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Abstract

The invention discloses a preparation method of a polyaniline modified multi-wall carbon canotubes / epoxy resin composite material. The preparation method comprises the following steps of: firstly, modifying the surfaces of multi-wall carbon canotubes with conducting macromolecular polyaniline through the doping of a functional protonic acid and the in situ polymerization of aniline; then, dispersing the multi-wall carbon canotubes with surfaces modified by polyaniline to an epoxy resin macromolecular solution, and adding a curing agent after removing the solvent; and finally, carrying out vacuum degassing, pouring into molds, heating and curing to prepare the composite material. The preparation method has simple process, low production cost and obvious reinforcing and toughening effects, and can effectively prevent the aggregation of the multi-wall carbon canotubes in epoxy resin and increase the dispersibility and the interfacial bonding of the multi-wall carbon canotubes in the epoxy resin. In addition, the conducting polyaniline is coated on the surfaces of the multi-wall carbon canotubes, and thus, the polyaniline modified multi-wall carbon canotubes / epoxy resin composite material acquires good mechanical properties and good antistatic function.

Description

technical field [0001] The invention belongs to the technical field of nano composite materials, and in particular relates to a preparation method of a polyaniline modified multi-wall carbon nanotube / epoxy resin composite material. Background technique [0002] Due to the characteristics of strong adhesion, corrosion resistance, good insulation performance and high strength, epoxy resin has been widely used in the fields of coatings, adhesives, electronic packaging and composite material substrates, but its disadvantage is that the internal stress after curing Large, so it is easy to peel and crack, and has poor fatigue resistance, heat resistance and impact toughness, resulting in limited application range. Carbon nanotubes are hollow carbon cage tubes formed by single-layer or multi-layer cylindrical graphite sheets, with diameters on the order of nanometers and lengths on the order of micrometers. Their strength and toughness are superior to other fibers, and they also ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K9/04C08K9/10C08K7/00C08K3/04C09C1/44C09C3/10
Inventor 许军李梅郭英吴瑶栗建钢
Owner CIVIL AVIATION UNIV OF CHINA
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