A preparation process of composite laminates with carbon nanotubes aligned

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...

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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

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