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Carbon nano tube/epoxide resin composite material and preparation method thereof

A technology of epoxy resin and carbon nanotubes, which is applied in the field of polymer materials, can solve the problems of low degree of functionalization and unsatisfactory compatibility of epoxy resin, etc., and achieve the effects of improved thermal performance, convenient processing, and controllable strength

Inactive Publication Date: 2010-07-14
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a big gap between the modification of functionalized carbon nanotubes on epoxy resin and people's expectations at this stage, mainly because the existing methods have low degree of functionalization and unsatisfactory compatibility with epoxy resin.

Method used

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  • Carbon nano tube/epoxide resin composite material and preparation method thereof
  • Carbon nano tube/epoxide resin composite material and preparation method thereof
  • Carbon nano tube/epoxide resin composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of a carbon nanotube / epoxy resin composite material

[0027] (1) Weigh 60g of epoxy resin into a 250ml three-neck flask, add 0.088g of plasma-activated grafted and modified carbon nanotubes, and ultrasonicate for 1h in a water bath at 70°C;

[0028] The preparation method of the carbon nanotubes modified by plasma activation described therein refers to the patent (publication number: CN101407321), wherein the diameter of the carbon nanotubes used is 30-35nm; the length is 10-20 μm; the specific surface area is >60m 2 / g; bulk density is 0.12g / m 3 ;

[0029] (2), the temperature of the carbon nanotube and epoxy resin mixture in step (1) is raised to 100°C, the stirring speed is controlled to be 600-1000rpm, the vacuum degree is 0.01MPa, and vacuum degassing is carried out for 30min;

[0030] (3) Add 28wt% curing agent 4.4-diaminodiphenylmethane to the mixture obtained in step (2), and stir at 600-1000rpm at a high speed until uniformly mixed;

[0031] (4),...

Embodiment 2

[0041] In step (1), the mass of the carbon nanotubes modified by plasma activation grafting was changed to 0.172 g, and other conditions and steps were exactly the same as in Example 1.

[0042] The tensile strength of the obtained composite material is 50.3MPa, the tensile modulus is 2003.0MPa, and the elongation at break is 2.30% respectively; the glass transition temperature of the composite material is 182.2°C. Compared with the same mass fraction of unfunctionalized carbon nanotubes / epoxy resin composite system (tensile strength 32.96MPa, tensile modulus 1854.26MPa, elongation at break 2.13%, glass transition temperature 181.6 ℃), there is a significant increase.

Embodiment 3

[0044] In step (1), the mass of the carbon nanotubes modified by plasma activation grafting was changed to 0.264 g, and other conditions and steps were exactly the same as in Example 2.

[0045] The tensile strength of the obtained composite material is 57.84MPa, the tensile modulus is 2323MPa, and the elongation at break is 4.95% respectively; the glass transition temperature of the composite material is 183.1°C.

[0046] Compared with the same mass fraction of unfunctionalized carbon nanotubes / epoxy resin composite system (tensile strength 39.96MPa, tensile modulus 1954.26MPa, elongation at break 2.23%, glass transition temperature 184.3 ℃), there is a significant increase.

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Abstract

The invention discloses a carbon nano tube / epoxide resin composite material and a preparation method thereof. The preparation method is as follows: weighing certain amount of eposide resin, putting the eposide resin into a flask; adding plasma-grafted and activated carbon nano tube; after water bath and ultrasonic treatments, stirring the mixture under high speed of 600-1000rpm, and removing the babbles under vacuum condition; at the same time heating to 100 DEG C and then adding 4,4-diaminodiphenyl methane which serves as curing agent; stirring under high speed of 600-1000rpm until the mixture is even; pouring the mixture into a silicone rubber mold to be cured; and finally cooling to room temperature along with the furnace. In this way, the carbon nano tube / epoxide resin composite material can be prepared. The invention realizes even dispersion of the carbon nano tube in the matrix of epoxide resin, the amino-group at the chain terminal of the functional carbon nano tube participates in the curing reaction of the epoxide resin and greatly enhances the interface interaction between the carbon nano tube and the matrix, and the composite material prepared through the method has high strength and high heat resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and specifically relates to the preparation of a carbon nanotube / epoxy resin composite material with superior thermal and mechanical properties by using highly functionalized carbon nanotubes. Background technique [0002] Epoxy resin is a commonly used thermosetting engineering plastic, which plays an increasingly important role in the fields of electronics, electrical appliances and aerospace due to its good dielectric properties, chemical stability and excellent adhesion. The cured epoxy resin is brittle, has low heat resistance and impact resistance, and its application is limited to a certain extent. Therefore, adding fillers to modify it has become a research hotspot for current researchers. [0003] Carbon nanotubes have super strong mechanical properties, ultra-high thermal properties and unique electrical, magnetic and optical properties. Combining carbon nanotubes with epoxy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/10C08K7/00C08K3/04C08G59/50
Inventor 王霞廖圣云李晓燕窦仁美贾润萍张文静
Owner UNIV OF SHANGHAI FOR SCI & TECH
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