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Al2O3 modified multiwalled carbon nanotube/epoxy resin composite material and preparation method thereof

A technology of multi-wall carbon nanotubes and epoxy resin, which is applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve the problems of poor performance of composite materials, difficulty in uniform dispersion, and poor resin adhesion, etc., to achieve Improvement of comprehensive performance, increase of wear resistance, and improvement of impedance performance

Active Publication Date: 2016-04-06
成都恒固新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that multi-walled carbon nanotubes are easy to intertwine and aggregate, the surface activity is not high, and the adhesion with the resin is poor, it is difficult to disperse evenly in the resin, and the performance of the obtained composite material is not good.

Method used

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  • Al2O3 modified multiwalled carbon nanotube/epoxy resin composite material and preparation method thereof
  • Al2O3 modified multiwalled carbon nanotube/epoxy resin composite material and preparation method thereof
  • Al2O3 modified multiwalled carbon nanotube/epoxy resin composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] a kind of Al 2 o 3 The preparation method of modified multi-walled carbon nanotube / epoxy resin composite material comprises the following steps:

[0031] (1) Preparation of acidified multi-walled carbon nanotubes

[0032] Weigh multi-walled carbon nanotubes into a beaker, then add concentrated sulfuric acid and concentrated nitric acid mixed acid with a volume ratio of 3:1, ultrasonically oscillate for 1 hour, then transfer to a three-necked flask, stir at 40°C and 200r / min for 12 hours, then use deionized water Dilute, filter with suction, wash with 0.1mol / L sodium hydroxide solution until neutral, and dry at 80°C to obtain acidified multi-walled carbon nanotubes; wherein the weight ratio of multi-walled carbon nanotubes to mixed acid is 1:40; concentrated sulfuric acid The concentration of concentrated nitric acid is 98%, and the concentration of concentrated nitric acid is 95%;

[0033] (2)Al 2 o 3 - Preparation of MWCNTs hybrid materials

[0034] Weigh the aci...

Embodiment 2

[0040] A preparation method of MWCNTs / epoxy composite coating, comprising the following steps:

[0041] (1) Preparation of acidified multi-walled carbon nanotubes

[0042] Weigh multi-walled carbon nanotubes into a beaker, then add concentrated sulfuric acid and concentrated nitric acid mixed acid with a volume ratio of 3:1, ultrasonically oscillate for 1 hour, then transfer to a three-necked flask, stir at 40°C and 200r / min for 12 hours, then use deionized water Dilute, filter with suction, wash with 0.1mol / L sodium hydroxide solution until neutral, and dry at 80°C to obtain acidified multi-walled carbon nanotubes; wherein the weight ratio of multi-walled carbon nanotubes to mixed acid is 1:10; concentrated sulfuric acid The concentration of concentrated nitric acid is 98%, and the concentration of concentrated nitric acid is 95%;

[0043] (2) Preparation of modified MWCNTs

[0044] Weigh the acidified multi-walled carbon nanotubes in a beaker, then add anhydrous ethanol / wa...

experiment example

[0048] The surface morphology of the coating was observed by a scanning electron microscope (SEM), the flexibility of the coating was measured by a material testing machine (MTS), and the electrical properties of the coating were tested by EIS.

[0049] (1) MWCNTs and Al 2 o 3 -Surface morphology of MWCNTs hybrid materials:

[0050] Depend on Figure 1-4 It can be seen that Al 2 o 3 Before coating, the multi-walled carbon nanotubes had a perfect tubular structure. After alumina coating, the surface of the multi-walled carbon nanotubes had sheet-like structures, but the shape of the tubular structure remained, indicating that the coating process did not destroy the tubular structure of the nanotubes. structure, the difference is that at this time it can be clearly seen that a layer of material is covered on the surface of the nanotube. In addition, it can also be seen from the figure that Al 2 o 3 -The agglomeration of MWCNTs hybrid materials is also reduced a lot, which...

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Abstract

The invention discloses a Al2O3 modified multiwalled carbon nanotube / epoxy resin composite material. A preparation method of the composite material comprises the following steps: (1) acidifying multiwalled carbon nanotubes; (2) ultrasonically dispersing weighed acidified multiwalled carbon nanotubes in deionized water for 15min, stirring at 40 DEG C and 500r / min for 30min, adding aluminum sulfate, adjusting the pH of the solution to 8.5-9.5 with NaOH, stirring at 200r / min for 6h, standing for 12h, drying, washing to be neutral, and calcining at 500 DEG C for 2h to obtain Al2O3-MWCNTs; (3) modifying the Al2O3-MWCNTs with KH560; and (4) mixing the modified Al2O3-MWCNTs with epoxy resin to obtain Al2O3-MWCNTs / epoxy resin. The preparation method is simple; the penetration resistance, the impedance property, and wear resistance of the prepared composite material are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, in particular to an Al 2 o 3 Modified multi-wall carbon nanotube / epoxy resin composite material and its preparation method. Background technique [0002] Epoxy resin has the characteristics of strong adhesion, corrosion resistance, good insulation and high strength, so it can be used in the fields of coatings, adhesives, electronic packaging and composite materials, but its disadvantage is that the internal stress after curing is large , easy to peel and crack, and poor fatigue resistance, heat resistance and impact toughness, resulting in limited application range. [0003] Carbon nanotubes (CNTs) have a very wide range of applications in many new fields such as nanoelectronic devices, super composite materials, hydrogen storage materials, and catalyst supports because of their unique structure, electricity, mechanics, and hydrogen storage. Application prospects. Compared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/08
CPCC08K7/24C08K9/06C08K9/10C08K2201/011C09D5/08C09D7/62C09D7/70C09D163/00
Inventor 何毅陈春林施太和钟菲范毅郭睿何泽杨强斌
Owner 成都恒固新材料科技有限公司
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