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Preparation method of laser-induced carbonization layer in aramid fiber resin-based composite material

A composite material and aramid fiber technology, applied in the direction of weight reduction, can solve the problems of waste of internal space, overall design impact, and insufficient space, and achieve the effects of excellent electrical conductivity, low price, and simple preparation process

Active Publication Date: 2022-07-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spacecraft needs to embed or paste various sensors on the surface of the structure to realize some of its functions, which involves the distribution of circuits. The traditional method is to arrange a large number of circuits inside, but this method will occupy the internal space of the circuits. Abundant space, for devices such as spacecraft that have extremely high requirements for internal space, the space occupied by wires is a waste of its internal space, and it also has a certain impact on its overall design

Method used

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  • Preparation method of laser-induced carbonization layer in aramid fiber resin-based composite material
  • Preparation method of laser-induced carbonization layer in aramid fiber resin-based composite material
  • Preparation method of laser-induced carbonization layer in aramid fiber resin-based composite material

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Effect test

Embodiment 1

[0027] The picosecond solid-state laser used in the present invention has a wavelength of 1064 nm, a pulse width of 15 ps and a repetition frequency of 50 KHz, wherein the power used in Example 1 is 4.5 W and the scanning speed is 1000 mm / s. The aramid fiber resin-based composite material of the present invention is prepared by a prepreg lamination molding process. It is composed of kevlar-29 fiber fabric and epoxy resin, the thickness is 1mm, the volume fraction of epoxy resin is 42%, and the volume fraction of fiber is 58%.

[0028] The method for preparing the carbonized layer by infrared picosecond laser inside the aramid fiber resin matrix composite material includes the following steps:

[0029] Step 1: Wipe the surface of the aramid fiber resin matrix composite sample to ensure that the surface is free of stains;

[0030] Step 2: Place the aramid fiber resin-based composite material sample on the laser sample platform, and the defocus amount between the laser focus and...

Embodiment 2

[0035] The laser parameters and materials used are the same as those in Example 1.

[0036] Step 1: Wipe the surface of the aramid fiber resin matrix composite sample to ensure that the surface is free of stains.

[0037] Step 2: Place the aramid fiber resin matrix composite material sample on the laser sample platform, and the defocus amount between the laser focus and the upper surface of the sample is -2mm, so that the laser focus is located on the inner horizontal plane of the material.

[0038] Step 3: Scan the aramid fiber resin matrix composite material sample of 100mm×50mm for 10 times by using an infrared picosecond laser with a power of 10w and a scanning speed of 1000mm / s. A carbonized circuit with a length of 50 mm and a width of 0.2 mm was obtained inside the material, and the resistivity of the carbonized circuit was measured to be 4.1×10 -5 Ω·m.

Embodiment 3

[0040] The laser parameters and materials used are the same as those in Example 1.

[0041] Step 1 and Step 2 are the same as Example 2

[0042] Step 3: Use an infrared picosecond laser with a power of 15w and a scanning speed of 1000mm / s to scan the aramid fiber resin matrix composite material sample of 100mm×50mm for 12 times. A carbonized curved line with a length of 150mm and a width of 0.2mm is obtained inside the material, as shown in the schematic diagram Figure 4 shown. It is measured that the resistivity of the carbonized circuit is 3.6×10 -5 Ω·m.

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Abstract

The invention discloses a preparation method of a laser-induced carbonization layer in an aramid fiber resin-based composite material. The preparation method comprises the following steps: wiping the surface of an aramid fiber resin-based composite material sample by using absolute ethyl alcohol; placing the aramid fiber resin-based composite material sample on a laser sample platform, wherein the defocusing amount of a laser focus and the upper surface of the sample is negative defocusing amount; a red picosecond laser is adopted to scan an aramid fiber resin-based composite material sample for multiple times, most energy of the laser penetrates through an epoxy resin layer to directly act on internal aramid fibers based on the extremely low laser absorptivity of surface layer epoxy resin, the internal aramid fibers are carbonized by the laser under the condition that the surface layer resin is not damaged, and thus the surface layer resin is carbonized. And a carbonization circuit is formed along with a laser scanning path, so that the conductive function of the aramid fiber resin-based composite material is realized. The conductive wire can replace a traditional wire in spaceflight equipment to realize a conductive function, is helpful for promoting lightweight design of a spacecraft and saving a large amount of space in the spacecraft, and has potential application value in the aspect of electromagnetic wave stealth of the spacecraft.

Description

technical field [0001] The invention relates to the technical field of laser processing, and relates to a laser modification method of an aramid fiber reinforced composite material. Background technique [0002] Aramid Fiber Reinforced Polymer (Aramid Fiber Reinforced Polymer, referred to as AFRP) is an advanced composite material formed by high-strength aramid fiber as reinforcement and resin as matrix. It has high specific strength and specific stiffness, It has the advantages of good fatigue resistance and strong designability. With the advancement of design and manufacturing technology of aramid fiber reinforced resin matrix composites, aramid fiber reinforced resin matrix composites can gradually replace the components of some key structural parts, and are widely used as lightweight materials in the aerospace field. [0003] In the aerospace field, aramid fiber reinforced resin matrix composites are mainly used for aerospace equipment shells and their skins. The space...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08L77/10C08L63/00C08K3/04
CPCC08J7/123C08J2377/10C08J2363/00C08K3/04Y02T50/40C08L77/10C08L63/00C08J7/12C08K7/02
Inventor 叶云霞杨剑赵煜任旭东花银群
Owner JIANGSU UNIV