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Oxidation treatment method of surface of carbon/carbon composite

A technology of carbon composite materials and oxidation treatment, which is applied in anodic oxidation and other directions, and can solve the problem of low bonding strength

Active Publication Date: 2012-12-19
无锡博智复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the defect of low bonding strength existing in the prior art, the present invention proposes an oxidation treatment method for the surface of carbon / carbon composite materials

Method used

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  • Oxidation treatment method of surface of carbon/carbon composite
  • Oxidation treatment method of surface of carbon/carbon composite
  • Oxidation treatment method of surface of carbon/carbon composite

Examples

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Comparison scheme
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Embodiment 1

[0016] This embodiment is an oxidation treatment method for the surface of a carbon / carbon composite material, and its specific process is:

[0017] Step 1, pretreat the carbon / carbon composite material sample; the density obtained by the isothermal chemical vapor infiltration method is 1.67-1.76g / cm 3 The carbon / carbon composite material is processed into a sheet shape and then sequentially used with 400 # , 800 # , 1200 # , 1500 # Sandpaper smooth. The polished carbon / carbon composites were ultrasonically cleaned with tap water, acetone, ethanol and distilled water respectively; air-dried. When cleaning, the ultrasonic frequency used is 25KH Z , the ultrasonic power is 100W, and the cleaning time is 15min.

[0018] Step 2, oxidation treatment of the carbon / carbon composite material; with the pretreated carbon / carbon composite material sample as the anode and the flake graphite electrode as the cathode, place the carbon / carbon composite sample and the flake graphite ele...

Embodiment 2

[0022] This embodiment is an oxidation treatment method for the surface of a carbon / carbon composite material, and its specific process is:

[0023] Step 1, pretreat the carbon / carbon composite material sample; the density obtained by the isothermal chemical vapor infiltration method is 1.67-1.76g / cm 3 The carbon / carbon composite material is processed into a thin sheet shape and polished with 400#, 800#, 1200#, and 1500# sandpaper in sequence, ultrasonically cleaned with tap water, acetone, ethanol, and distilled water, and dried in the air. When cleaning, the ultrasonic frequency used is 40KH Z , the ultrasonic power is 100W, and the cleaning time is 20min.

[0024] In step 2, the carbon / carbon composite material is treated by an ultrasonic-assisted anodic oxidation treatment method; the electrolyte used is 500 ml of 0.75 mol / L phosphoric acid aqueous solution. And the distance between the carbon / carbon composite sample and the flake graphite electrode is 15mm, the distance...

Embodiment 3

[0028] This embodiment is an oxidation treatment method for the surface of a carbon / carbon composite material, and its specific process is:

[0029] Step 1, pretreat the carbon / carbon composite material sample; the density obtained by the isothermal chemical vapor infiltration method is 1.67-1.76g / cm 3 The carbon / carbon composite material is processed into a sheet shape and then sequentially used with 400 #, 800 # , 1200 # , 1500 # Sandpaper smooth. The polished carbon / carbon composites were ultrasonically cleaned with tap water, acetone, ethanol and distilled water respectively; air-dried. When cleaning, the ultrasonic frequency used is 60KH Z , the ultrasonic power is 100W, and the cleaning time is 30min.

[0030] Step 2, oxidation treatment of the carbon / carbon composite material; with the pretreated carbon / carbon composite material sample as the anode and the flake graphite electrode as the cathode, place the carbon / carbon composite sample and the flake graphite elec...

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Abstract

The invention relates to an oxidation treatment method of the surface of a carbon / carbon composite. The method is as follows: a pretreated carbon / carbon composite sample is used as anode, a flake graphite electrode is used as cathode, and the carbon / carbon composite sample and the flake graphite electrode are placed in electrolyte to perform oxidation treatment. After oxidation treatment, the surface wetting angle of the carbon / carbon composite is reduced by 73-87% compared with the untreated composite, the hydrophobic composite is changed to be a hydrophilic composite; chemical functional groups are grafted on the surface of the carbon / carbon composite, the O / C atom percentage on the carbon / carbon surface is increased from 0.1120 to 0.3181-0.3867, and the P / C atom percentage of the treated carbon / carbon surface is 0.05-0.07. The grafted functional groups containing phosphorus and oxygen can be used to form chemical bonds with the subsequently prepared biological coating, thus the bonding strength of the coating and the substrate can be increased. The method can be used in the carbon / carbon composite pretreatment before the carbon / carbon composite biological coating is prepared bymethods such as the bionic method and the plasma spraying method.

Description

technical field [0001] The invention belongs to the technical field of carbon / carbon composite materials, and in particular relates to an oxidation treatment method for the surface of carbon / carbon composite materials. Background technique [0002] Carbon / carbon (C / C) composite material is a kind of biological material, which has excellent biocompatibility, is stable in the living body and will not be corroded; good biomechanical compatibility, very close to the elastic modulus of bone ; It has high strength, fatigue resistance, good toughness, low density, certain pseudoplasticity, micropores are conducive to tissue growth, and the material properties can be adjusted to meet specific mechanical requirements through structural design. The carbon / carbon composite artificial bone developed by Ukrainian NSC KIPT (National Science Center "Kharkov Institute of Physics and Technology") has been used clinically for nearly ten years and has achieved good therapeutic effects. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/02
Inventor 李贺军赵雪妮李克智卢锦花曹盛陈梦迪张磊磊
Owner 无锡博智复合材料有限公司