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A kind of preparation method of carbon nanotube microsphere/glass fiber synergistically reinforced epoxy composite material

A technology of carbon nanotube microspheres and glass fibers, which is applied in the field of fiber-reinforced composite materials to achieve good compatibility, high material utilization, and easy scale-up production

Active Publication Date: 2017-07-18
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In order to solve the technical problems existing in the prior art, the present invention proposes a method for preparing a carbon nanotube microsphere / glass fiber synergistically reinforced epoxy composite material, which can effectively solve the problem of carbon nanotubes being trapped in the resin transfer molding process. Agglomeration problems caused by fiber fabric blocking or filtering, improve the interface strength of fiber fabric reinforced composite materials, greatly reduce the delamination damage phenomenon, and realize the stability of composite materials

Method used

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  • A kind of preparation method of carbon nanotube microsphere/glass fiber synergistically reinforced epoxy composite material
  • A kind of preparation method of carbon nanotube microsphere/glass fiber synergistically reinforced epoxy composite material
  • A kind of preparation method of carbon nanotube microsphere/glass fiber synergistically reinforced epoxy composite material

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Embodiment 1

[0032] A method for preparing a carbon nanotube microsphere / glass fiber synergistically reinforced epoxy composite material, the specific steps are as follows:

[0033] (1) Preparation of glass fiber: surface density 100g / m 2 Unidirectional glass fiber fabric, dry at 80°C for 2 hours, set aside;

[0034] (2) Preparation of resin solution: dissolve the solid glycidyl ether epoxy resin in acetone solvent, stir until it is fully dissolved; based on the mass of the solid glycidyl ether epoxy resin, add 0.01wt% carboxylated Carbon nanotubes, 0.01 wt% polyethylene glycol octyl phenyl ether and 15 wt% modified imidazole latent curing agent, stirred for 1 min, ultrasonically dispersed for 30 min; sealed and stored until use.

[0035] (3) Preparation of carbon nanotube microspheres: 2.0% (according to the mass of solid glycidyl ether epoxy resin) polyvinylpyrrolidone dispersant is dissolved in deionized water to obtain 0.002g / ml microsphere forming liquid, pour into the In the micros...

Embodiment 2

[0038] A kind of preparation method of carbon nanotube microsphere / glass fiber synergistically reinforced epoxy composite material, it is different from embodiment 1 in that the solid epoxy resin described in step (2) is glycidyl ester epoxy resin, Water-soluble organic solvent is methyl ethyl ketone, described carbon nanotube is 1.0wt% (resin weight ratio), and described tensio-active agent is 10wt% (resin weight ratio), stirs 2min, ultrasonic dispersion 60min; In step (3) The microsphere molding solution is 0.04g / ml, and the rotating speed is 3000rpm; the low-viscosity epoxy resin described in step (4) is a glycidyl ester epoxy resin with a viscosity of 1000~1800mPa·s, and the resin molding process is vacuum-assisted resin transfer Molding process, the curing agent is triethylenetetramine.

Embodiment 3

[0040] A kind of preparation method of carbon nanotube microsphere / glass fiber synergistically reinforced epoxy composite material, its difference from embodiment 1 is that the surface density in step (1) is 800g / m 2 , the solid epoxy resin described in the step (2) is a glycidyl amine epoxy resin, the water-soluble organic solvent is dehydrated alcohol, and the carbon nanotubes are 0.01wt% (resin weight ratio) hydroxylated carbon nanotubes, the surface Activator is 0.05wt% (resin weight ratio) polyoxyethylene sorbitan monolaurate, and described latent curing agent is 30wt% (resin weight ratio) modified dicyandiamide type curing agent; Step (3 ) in the dispersant is polyethylene glycol, rotating speed 1000rpm, titer 2ml / min; the low-viscosity epoxy resin described in the step (4) is that the viscosity is 1400~2000mPa·s glycidylamine epoxy resin, resin molding The process is resin impregnation molding process, and the curing agent is p-phenylenediamine.

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Abstract

The present invention discloses a carbon nano-tube microsphere / glass fiber synergistically-reinforced epoxy composite material preparation method, which comprises: completely dissolving a solid epoxy resin in an organic solvent, adding carbon nano-tubes, a surfactant and a latent curing agent, and carrying out mixing stirring and uniform ultrasonic dispersing to obtain a carbon nano-tube and epoxy resin mixing solution; transferring the mixing solution to a liquid separation container with an orifice or micro-pore on the bottom portion, and slowly dropping into a below collection container filled with deionized water and a dispersing agent; after the solution completely drops, collecting the microspheres, repeatedly washing, and drying for spare; and uniformly paving the microspheres between glass fiber fabrics, pre-heating to melt the microspheres, pouring an epoxy resin glue liquid by using a resin transfer molding process, and carrying out high-temperature curing to obtain the material. According to the present invention, the problem that the carbon nano-tubes are filtered and agglomerate in the resin transfer molding process can be effectively solved, the interfacial bond strength of the composite material can be improved, and the stable performance of the composite material can be achieved.

Description

technical field [0001] The invention belongs to the technical field of fiber-reinforced composite materials, and in particular relates to a method for preparing a carbon nanotube microsphere / glass fiber synergistically reinforced epoxy composite material. Background technique [0002] Glass fiber reinforced composite materials are widely used in aviation, petrochemical, new energy and many other fields due to their excellent properties such as high strength, high modulus, good formability, corrosion resistance and fatigue damage. The properties of composite materials not only depend on the properties of reinforcing fibers and matrix, but also largely depend on the strength of interfacial bonding. Glass fiber reinforced composite materials have the characteristics of high specific strength and specific modulus, but they are relatively brittle and have poor impact resistance. Carbon nanotubes (CNTs) have the advantages of large aspect ratio, excellent thermal conductivity, li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/14C08K7/24
CPCB29C70/58B29K2063/00
Inventor 段鹏鹏申明霞曾少华陆凤玲王珠银
Owner HOHAI UNIV
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