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Method for modifying surface of fibrous material

A fiber material and surface modification technology, applied in carbon fiber, fiber treatment, textiles and papermaking, etc., can solve not many problems, achieve the effects of no pollution, low requirements for production equipment, and improved composite performance

Active Publication Date: 2011-08-17
HEBEI GANGYAN DEKAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many studies on fiber surface modification by CVD technology, and almost none can be realized under normal pressure. The technology of fiber surface modification by coating metal film by CVD method has not yet been patented in China.

Method used

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  • Method for modifying surface of fibrous material
  • Method for modifying surface of fibrous material
  • Method for modifying surface of fibrous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Carbon fiber (6.5 μm in diameter) is selected as the fiber material, and tungsten hexacarbonyl is selected as the metal carbonyl compound. Burn the carbon fiber at 360°C±10°C for 10 minutes, then soak it in 20% nitric acid solution for 15 minutes, wash it with deionized water and dry it; then place the pretreated carbon fiber in the deposition reaction chamber The raw material of tungsten hexacarbonyl is kept at a constant temperature of 120°C. Nitrogen is used as the carrier gas and diluent gas. The concentration of tungsten hexacarbonyl gas entering the deposition chamber is controlled to be about 1% (volume percentage). The deposition reaction occurs at 550°C for 15 minutes. The surface of the fiber is coated with a tungsten film with a thickness close to 100nm. Scanning electron microscope photo of tungsten-coated carbon fiber figure 1 ; The results of energy spectrum analysis of the coating are as follows figure 2 , The tungsten film has very high purity and alm...

Embodiment 2

[0027] Carbon fiber (6.5 μm in diameter) is selected as the fiber material, and tungsten hexacarbonyl is selected as the metal carbonyl compound. Burn the carbon fiber at 400°C±10°C for 6 minutes, then soak it in 30% nitric acid solution for 10 minutes, wash it with deionized water and dry it; then place the pretreated carbon fiber in the deposition reaction chamber The raw material of tungsten hexacarbonyl is kept at a constant temperature of 150°C, argon is used as the carrier gas and diluent gas, the concentration of tungsten hexacarbonyl gas entering the deposition chamber is controlled to be about 0.5% (volume percentage), and the deposition reaction occurs at 350°C for 60 minutes. The surface of the carbon fiber is coated with a tungsten film with a thickness close to 70nm. According to the GB / T14337-2008 standard, the mechanical performance test shows that the toughness of the carbon fiber after tungsten plating is good, and the tensile strength retention rate of the ca...

Embodiment 3

[0029] Carbon fiber (6.5 μm in diameter) is selected as the fiber material, and nickel tetracarbonyl is selected as the metal carbonyl compound. Burn the carbon fiber at 410°C±10°C for 5 minutes, then soak it in 40% nitric acid solution for 5 minutes, wash it with deionized water and dry it; then place the pretreated carbon fiber in the deposition reaction chamber , the nickel tetracarbonyl raw material is kept at a constant temperature of 5°C, argon is used as the carrier gas and diluent gas, and the concentration of nickel tetracarbonyl gas entering the deposition chamber is controlled to be about 2% (volume percentage), and the deposition reaction occurs at 250°C for 10 minutes. The surface of the fiber is coated with a nickel film with a thickness of about 150nm. According to the mechanical performance test of GB / T14337-2008 standard, the carbon fiber has good toughness after nickel plating, and the tensile strength retention rate reaches 90%.

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Abstract

The invention discloses a method for modifying the surface of a fibrous material, which comprises the following steps: (1) performing surface roughening pretreatment on fiber through a firing or micro-chemical corrosion process; (2) placing the fiber after being subjected to the surface roughening pretreatment into a vapor-phase reaction deposition chamber for primary deposition reaction, taking nitrogen or argon as carrier gas, carrying gas-state metal carbonyl into the deposition chamber, simultaneously introducing diluent gases, such as the nitrogen, the argon or carbon monoxide and the like, controlling a certain gas flow and the temperature of the deposition chamber, and allowing metal carbonyl to produce thermal decomposed deposition reaction on the surface of the fiber for 5 to 60 minutes; and (3) after finishing the primary deposition reaction, keeping introducing inert gas, performing natural cooling to room temperature and then taking the fiber out. The method has the advantages of effectively improving the surface performance of the fibrous material, improving the molding manufacturability and overall performance of a fiber-reinforced metal matrix composite, simultaneously better keeping the strength of the conventional fibrous material and having a simple process and no pollution.

Description

technical field [0001] The invention belongs to the technical field of preparation of fibers and composite materials thereof, and in particular relates to a method for surface modification of fiber materials. Background technique [0002] The relationship between fiber materials and composite materials is mainly achieved by making various types of fibers as reinforcements and compounding them with matrix materials such as resins and metals to make fiber composite materials such as fiber-reinforced plastics and fiber-reinforced metals. Fiber reinforced materials are the most widely used and the largest amount of composite materials. Fiber materials that can be used as reinforcing materials are roughly divided into inorganic fibers and organic fibers according to their chemical composition. Among them, inorganic fibers include glass fibers, carbon fibers, boron fibers, whiskers, asbestos fibers, etc., and organic fibers include synthetic fibers such as aramid fibers fiber, or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83C03C25/46C03C25/22C04B41/88D06M101/40
Inventor 李一柳学全李发长李楠石文霍静聂俊辉
Owner HEBEI GANGYAN DEKAI TECH CO LTD
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