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Method for preparing carbon nanofiber and carbon nanotube modified carbon fiber/epoxy resin multi-dimensional hybrid composite

A carbon nanotube modification and nanocarbon fiber technology, which is applied in the field of nanomaterials, can solve the problems of difficult uniform dispersion, high surface energy of carbon nanotubes, easy to agglomerate, etc., to improve comprehensive mechanical properties and improve interlaminar shear strength. Insufficient, strong interface bonding effect

Inactive Publication Date: 2011-02-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon nanotubes have high surface energy and are prone to agglomeration, making it difficult to disperse uniformly in polymers

Method used

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  • Method for preparing carbon nanofiber and carbon nanotube modified carbon fiber/epoxy resin multi-dimensional hybrid composite
  • Method for preparing carbon nanofiber and carbon nanotube modified carbon fiber/epoxy resin multi-dimensional hybrid composite
  • Method for preparing carbon nanofiber and carbon nanotube modified carbon fiber/epoxy resin multi-dimensional hybrid composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0033] Example 1: Multi-walled carbon nanotubes (OD<8nm), carbon nanofibers and carbon fibers prepared by the arc discharge method are used as initial raw materials. The multi-walled carbon nanotubes are first purified, and then acidified carbon nanotubes and carbon nanofibers are respectively After acidification, acyl chlorination and amination with carbon fibers, and then anhydrided with pyromellitic dianhydride, the carbon nanofibers and carbon nanotubes are chemically cross-linked with liquid bisphenol A epoxy resin (E-51). Then get the carbon nanofibers and multi-walled carbon nanotubes whose surface is connected with liquid bisphenol A type epoxy resin, and then compound them with the carbon fibers anhydrided with pyromellitic dianhydride in a certain way to obtain carbon nanofibers and carbon nanotubes modified Innovative carbon fiber / epoxy resin multidimensional hybrid composites.

[0034] Step (1): In a 250mL single-neck round bottom flask equipped with a stirrer, add...

Embodiment 2

[0043] Example 2: Single-walled carbon nanotubes (OD<8nm), carbon nanofibers, and carbon fibers prepared by chemical vapor deposition were used as initial raw materials, and the single-walled carbon nanotubes were purified, and the carbon nanotubes, carbon nanofibers, and carbon fibers were acidified respectively , acyl chlorination, amination, and then acid anhydride with benzophenone tetraacid dianhydride, chemical cross-linking reaction of carbon nanofibers and carbon nanotubes with liquid bisphenol A epoxy resin (E-54), the obtained Carbon nanofibers and single-walled carbon nanotubes with liquid bisphenol A type epoxy resin (E-54) are connected on the surface, and then compounded with carbon fibers anhydrided with benzophenone tetraacid dianhydride in a certain way to obtain carbon nanofibers and carbon nanotubes. Tube-modified carbon fiber / epoxy multidimensional hybrid composites.

[0044] Step (1): In the 500mL single-necked round-bottomed flask equipped with a magnetic...

Embodiment 3

[0052] Example 3: Single-walled carbon nanotubes (OD， - After the anhydride of diphenylmethane is anhydrided, the carbon nanofibers and carbon nanotubes are chemically cross-linked with liquid bisphenol A epoxy resin (E-44), and then liquid bisphenol A epoxy resin is obtained on the surface. Resin (E-44) of carbon nanofibers and single-walled carbon nanotubes, and then combine them with N,N ， -Diphenylmethane-anhydrided carbon fibers are compounded in a certain way to obtain carbon fiber / epoxy resin multi-dimensional hybrid composite materials modified by carbon nanofibers and carbon nanotubes.

[0053] Step (1): In the 500mL single-neck round bottom flask equipped with mechanical stirring, add 10g single-walled carbon nanotube raw material and 250mL, 20% weight concentration sulfuric acid solution, use 120kHz ultrasonic treatment for 80 hours, then heat and heat at 180 Stir and reflux at ℃, react for 48 hours, filter with ψ0.8μm polytetrafluoroethylene microfiltration membran...

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Abstract

The invention belongs to the technical field of nano materials and particularly relates to a method for preparing a carbon nanofiber and carbon nanotube modified carbon fiber / epoxy resin multi-dimensional hybrid composite. The method comprises the following steps of: performing surface carboxylation and acylation treatment on carbon nanotubes, carbon nanofibers and carbob fibers; introducing diamine or polyamine to the obtained product; modifying amino carbon nanofibers and carbon nanotubes with an aromatic polyanhydride compound to prepare the carbon fibers, the carbon nanofibers and the carbon nanotubes carrying anhydride radicals; and ultrasonically oscillating the carbon nanofibers, the carbon nanotubes and the epoxy resin with the anhydride and stirring the mixed materials at a high speed to make the carbon nanofibers and the carbon nanotubes uniformly dispersed in the epoxy resin matrix and make the carbon nanofibers and the carbon nanotubes grafted with the anhydride and the epoxy resin fully undergo a chemical crosslinking reaction so as to obtain an epoxy resin linear block polymer, and combining the epoxy resin linear block polymer serving as a matrix and the carbon fibers to form multi-dimensional hybrid composite structures connected by covalent bonds. In the invention, by using the carbon nanotubes, the carbon nanofibers and the strength and toughness toughened epoxy resin, the bonding strength of carbon fiber interfaces is improved, so that the integral performance of the carbon fiber / epoxy resin multi-dimensional hybrid composite is improved, and the application range of the carbon fibers and the epoxy resin is widened.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation method of carbon nanofiber and carbon nanotube modified carbon fiber / epoxy resin multidimensional hybrid composite material. Background technique [0002] Epoxy resin has good thermal stability and dimensional stability. As a matrix resin for composite materials, it has received extensive attention in recent years and is widely used in high-tech fields such as aerospace, mechanical electronics, and printed circuit boards. Epoxy resin is a thermosetting oligomer with poor performance and has no direct use value except as a stabilizer for polyvinyl chloride; when it is cured with a curing agent to form a three-dimensional cross-linked network structure, it presents A series of excellent performance. The behavior of the epoxy resin during the curing process and the performance of the cured product depend to a large extent on the performance of the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C08K7/06C08L63/00C08K9/04C08G59/42
Inventor 邱军王宗明
Owner TONGJI UNIV
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