Preparation process of composite material laminated plate formed by directionally arranging carbon nano-tubes

A composite material layer, carbon nanotube technology, applied in the direction of synthetic resin layered products, lamination, coating, etc., can solve the problems of inability to realize parallel electric field, voltage, frequency range is not determined, etc., to improve mechanical properties, operation simple effect

Active Publication Date: 2016-11-09
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] At present, in the prior art, there is no method of using high-frequency pulsed electric field to realize the alignment of carbon nanotubes in composite material laminates. The following problems still need to be solved: a. The carbon fiber composite material of nanotubes has conductive properties, and it cannot realize the envisioned parallel electric field, but a conductive circuit; b. At which stage the electric field needs to be added when the composite material is solidified, and the power-on time needs to be analyzed and explored; c .The voltage and frequency range required to align carbon nanotubes in composite materials have not been determined

Method used

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  • Preparation process of composite material laminated plate formed by directionally arranging carbon nano-tubes

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Embodiment 1

[0036] Under warm conditions (10° C.-30° C.), a composite material laminate was prepared by passing a pulsed alternating current with a voltage of 5 V and a frequency of 1 KHz.

[0037] 1) Mix acetone and carbon nanotubes with a mass ratio of 100:1, stir for 5 minutes using a high-speed shear mixer at room temperature, and stir and dry at a stirring rate of 20,000 r / min;

[0038] 2) Mix the epoxy resin and curing agent with a mass ratio of 5:1, add carbon nanotubes with a mass percentage of 1% of the solution after mixing the epoxy resin and curing agent, first use a low-speed mixer to stir for 5 minutes, and the stirring rate is 80r / min, then use a high-speed shear mixer to stir for 2min, and the stirring rate is 15000r / min to obtain a uniformly dispersed carbon nanotube / epoxy resin mixed solution;

[0039] 3) Apply the mixed carbon nanotube / epoxy resin mixed solution evenly on the carbon fiber cloth to make a carbon fiber resin prepreg with a resin quality of about 30%;

...

Embodiment 2

[0043] Under room temperature conditions (10° C.-30° C.), a composite material laminate was prepared through a pulsed alternating current with a voltage of 50 V and a frequency of 0.5 MHz.

[0044] 1) Mix acetone and carbon nanotubes with a mass ratio of 100:1, stir for 5 minutes using a high-speed shear mixer at room temperature, and stir and dry at a stirring rate of 20,000 r / min;

[0045] 2) Mix the epoxy resin and curing agent with a mass ratio of 5:1, add carbon nanotubes with a mass percentage of 5% of the solution after mixing the epoxy resin and curing agent, first use a low-speed mixer to stir for 10 minutes, and the stirring rate is 100r / min, then use a high-speed shear mixer to stir for 3min, and the stirring rate is 15000r / min to obtain a uniformly dispersed carbon nanotube / epoxy resin mixed solution;

[0046] 3) Apply the mixed carbon nanotube / epoxy resin mixed solution evenly on the carbon fiber cloth to make a carbon fiber resin prepreg with a resin quality of ...

Embodiment 3

[0050] Under room temperature conditions (10° C.-30° C.), a composite material laminate was prepared through a pulsed alternating current with a voltage of 100 V and a frequency of 1 MHz.

[0051] 1) Mix acetone and carbon nanotubes with a mass ratio of 100:1, stir for 5 minutes using a high-speed shear mixer at room temperature, and stir and dry at a stirring rate of 20,000 r / min;

[0052] 2) Mix the epoxy resin and curing agent with a mass ratio of 5:1, add carbon nanotubes with a mass percentage of 10% of the solution after mixing the epoxy resin and curing agent, first use a low-speed mixer to stir for 15 minutes, and the stirring rate is 120r / min, then use a high-speed shear mixer to stir for 5min, and the stirring rate is 15000r / min to obtain a uniformly dispersed carbon nanotube / epoxy resin mixed solution;

[0053] 3) Apply the mixed carbon nanotube / epoxy resin mixed solution evenly on the carbon fiber cloth to make a carbon fiber resin prepreg with a resin quality of ...

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Abstract

The invention provides a preparation process of a composite material laminated plate formed by directionally arranging carbon naon-tubes. The preparation process is characterized by comprising the following steps: (1) mixing acetone with carbon nano-tubes in a mass ratio of 100: 1, stirring for 5 min by using a high-speed cutting stirrer at the stirring rate of 20000 r / min, and drying for standby use; ..., (5) hot pressing and forming a prepreg with the upper surface and lower surface respectively laid with a copper film electrode in a composite material hot vulcanizing instrument, first heating to 40 to 60 DEG C, respectively introducing high-frequency pulse alternating-current power to the copper film electrodes at the upper end and lower end of the prepreg, wherein the electrification time is 5 to 10 minutes, removing the power after the electrification, then heating to a curing temperature of epoxy resin, thermally insulating for 2h, naturally cooling, and demolding to prepare the composite material laminated plate of carbon fiber / epoxy resin filling the carbon nano-tubes. According to the preparation process, the carbon naon-tubes are directionally arranged along the thickness direction (direction Z) of the laminated plate by utilizing a high-frequency pulse electric field, so that the preparation process is simple to operate, and the produced composite material has excellent performance.

Description

technical field [0001] The invention mainly relates to the technical field of carbon fiber / epoxy resin composite materials, in particular to a preparation process of a composite material laminate in which carbon nanotubes are oriented along the thickness direction (z direction) of the laminate. Background technique [0002] In recent years, with the widespread application of carbon fiber composite materials in various industries, people have found that they are extremely vulnerable to impact damage and delamination. This requires finding a way to effectively improve the performance of composite materials. There have been a lot of researches on the method of filling carbon nanotubes in carbon fiber composite materials to improve the mechanical properties and toughening of composite materials, and some results have been achieved. Although this method of filling carbon nanotubes can improve the mechanical properties of the composite material, the improvement in the interlayer p...

Claims

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Application Information

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IPC IPC(8): C08J5/24C08L63/00C08K9/04C08K7/24C08K7/06B32B15/20B32B15/09B32B9/00B32B5/02B32B9/04B32B27/36B32B5/26B32B7/08B32B33/00B32B37/10B32B37/06
CPCB32B5/26B32B7/08B32B15/09B32B15/20B32B27/12B32B27/36B32B33/00B32B37/06B32B37/10B32B2250/05B32B2255/02B32B2255/24B32B2255/26B32B2262/106B32B2307/20B32B2307/206C08J5/24C08J2363/00C08K7/06C08K7/24C08K9/04C08L63/00
Inventor 李长青董怀斌任攀巴德玛张威威
Owner ACADEMY OF ARMORED FORCES ENG PLA
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