Modified carbon nanotube/thermosetting resin composite and preparation method thereof

A technology of resin composite materials and nanotubes, which is applied in the field of conductor/polymer composite materials and their preparation, can solve the problems of difficult preparation methods and low dielectric constant of composite materials, so as to overcome dielectric loss and improve dielectric constant , The method is simple and easy to implement

Inactive Publication Date: 2014-09-17
SUZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dielectric constant of the composite material prepared by this method is low, and the test frequency is 10 2 ~10 7 Only a few dozen in range
[0004] It can be seen from the above prior art that the current carbon nanotube / polymer composite material preparation technology can basically only improve some or some deficiencies, and it is difficult to adopt a simple and easy preparation method, while maintaining good dispersion of carbon nanotubes. On the basis of improving the dielectric constant and reducing the dielectric loss of the composite material at the same time

Method used

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  • Modified carbon nanotube/thermosetting resin composite and preparation method thereof
  • Modified carbon nanotube/thermosetting resin composite and preparation method thereof
  • Modified carbon nanotube/thermosetting resin composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of hyperbranched polysiloxane modified polyaniline

[0035] Get 30mL dehydrated alcohol as solvent, add 23.6g 3-glycidyl etheroxypropyl trimethoxysilane to it, at room temperature, N 2 Under the conditions of protection and magnetic stirring, slowly add 2.0 g of HCl solution with a pH of 2 dropwise; after the dropwise addition, raise the temperature to 50°C and continue the reaction for 7 hours; after the reaction, carry out vacuum distillation to obtain a transparent and viscous of hyperbranched polysiloxanes. The weight average molecular weight was 7500. Its infrared spectrum is as figure 1 shown.

[0036] 0.9g aniline, 1.1g o-toluidine and 1.7g m-aminobenzenesulfonic acid were mixed respectively, and 150mL hydrochloric acid solution (0.2mol / L) was added in the mixture; 2 Under protection and at 0-5°C, mechanically stir for 30 minutes. Subsequently, 100 mL of ammonium persulfate (0.3 mol / L) solution was added dropwise and vigorously stirred. After...

Embodiment 2

[0056] 1. Preparation of hyperbranched polysiloxane modified polyaniline

[0057] Prepare hyperbranched polysiloxane-modified polyaniline according to the technical scheme of embodiment 1.

[0058] 2. Preparation of modified carbon nanotubes

[0059] Add 1g of carbon nanotubes and 0.1g of hyperbranched polysiloxane-modified polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20min, add 100mL of methanol to precipitate, filter and wash with suction, and °C for 24 hours in vacuum to obtain modified carbon nanotubes. Its X-ray diffraction spectrum, Raman spectrum and scanning electron microscope picture are as follows Figure 9 , 10 and 11.

[0060] 3. Preparation of modified carbon nanotube / epoxy resin composites

[0061] Add 0.55g of modified carbon nanotubes and 100g of epoxy resin (grade E-51) into the flask, stir at 60°C and ultrasonically for 1 hour, vacuum degassing for 30min, add 4g of 2-ethyl-4- Methylimidazole, continue to stir for 10 minute...

Embodiment 3

[0063] 1. Preparation of hyperbranched polysiloxane modified polyaniline

[0064] Prepare hyperbranched polysiloxane-modified polyaniline according to the technical scheme of embodiment 1.

[0065] 2. Preparation of modified carbon nanotubes

[0066] Add 1g of carbon nanotubes and 0.2g of hyperbranched polysiloxane-modified polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20min, add 100mL of methanol to precipitate, filter and wash with suction, and °C for 24 hours in vacuum to obtain modified carbon nanotubes. Its X-ray diffraction spectrum, Raman spectrum and scanning electron microscope picture are as follows Figure 9 , 10 and 11.

[0067] 3. Preparation of modified carbon nanotube / epoxy resin composites

[0068] Add 0.6g of modified carbon nanotubes and 100g of epoxy resin (grade E-51) into the flask, stir at 60°C and ultrasonically for 1 hour, vacuum degassing for 30min, add 4g of 2-ethyl-4- Methylimidazole, continue to stir for 10 minutes...

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Abstract

The invention discloses a modified carbon nanotube / thermosetting resin composite and a preparation method thereof. The preparation method includes: dissolving polyaniline into dimethyl sulfoxide, dropwise adding epoxy-group-containing hyperbranched polysiloxane, adding hydrochloric acid, and washing and performing suction filtration after reaction is completed so that hyperbranched polysiloxane modified polyaniline is obtained; adding a nanotube and the hyperbranched polysiloxane modified polyaniline into dimethyl sulfoxide, precipitating in methyl alcohol, performing suction filtration and washing so that a modified nanotube is obtained; and uniformly mixing molten-state thermosetting resin with the modified nanotube, and curing so that the modified carbon nanotube / thermosetting resin composite is obtained. The modified carbon nanotube / thermosetting resin composite has the advantages of high dielectric constant and low dielectric loss, a hyperbranched polysiloxane modified polyaniline conductive layer wraps the surface of the nanotube, and decentralized control of the nanotube and control of the dielectric property of the composite can be realized by adjusting the content of the surface wrapping layer. The preparation method is simple, feasible and suitable for large-scale application.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a conductor / polymer composite material and a preparation method thereof. Background technique [0002] Composite materials with high dielectric constant and low dielectric loss are important functional materials at present. They have good functions of storing electric energy and uniform electric field, and play an important role in many cutting-edge industrial fields including aerospace, electronic information, and electrical insulation. . Carbon nanotubes are considered ideal for next-generation high-performance structural composites and multifunctional materials due to their extremely large aspect ratio (greater than 100), high modulus, high strength, and excellent heat and chemical resistance. Reinforcement body. Carbon nanotube / polymer composites are an important form of preparing high dielectric constant materials. In recent decades, domestic and for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L79/04C08L79/08C08K9/10C08K7/00C08K3/04
Inventor 梁国正强志翔顾嫒娟张志勇袁莉
Owner SUZHOU UNIV
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