阅读说明：本技术 一种碳/碳复合材料表面生物活化改性的包埋SiC涂层及制备方法 (Embedded SiC coating modified by biological activation on surface of carbon/carbon composite material and preparation method thereof ) 是由 张磊磊 刘叶叶 李贺军 于 2019-10-08 设计创作，主要内容包括：本发明涉及一种碳/碳复合材料表面生物改性的包埋SiC涂层及制备方法,首先对包埋SiC涂层进行表面高温微氧化处理,使得涂层的表面呈现出粗糙形貌,从而有利于后续生物活性羟基磷灰石纳米带的渗入和结合,其次采用在高温炉中使得羟基磷灰石纳米带和氧化铝有效渗入和贴合在包埋SiC涂层的表面,最后借助液相炉中的羟基磷灰石纳米棒与碳的共沉积,最终实现碳/碳复合材料表面包埋SiC涂层的生物改性。有益效果是：碳/碳复合材料表面包埋SiC涂层经过高温微氧化处理,使得表面呈现粗糙状态,然后借助羟基磷灰石纳米带及氧化铝在高温下的有渗入以及羟基磷灰石纳米棒和碳的高温液相涂覆,赋予其表面生物活性,从而完成其表面生物改性。(The invention relates to an embedded SiC coating for biologically modifying the surface of a carbon/carbon composite material and a preparation method thereof. The beneficial effects are that: the SiC coating embedded on the surface of the carbon/carbon composite material is subjected to high-temperature micro-oxidation treatment to enable the surface to be in a rough state, and then the surface bioactivity is endowed by means of the infiltration of hydroxyapatite nanobelts and alumina at high temperature and the high-temperature liquid phase coating of hydroxyapatite nanorods and carbon, so that the surface biological modification of the carbon/carbon composite material is completed.)

1. A carbon/carbon composite material surface biological activation modified embedded SiC coating is characterized in that: SiC coating, carbon particles, alumina particles, hydroxyapatite nanorods and hydroxyapatite nanobelts; the surface of the SiC coating is of a rough sawtooth-shaped structure, hydroxyapatite nanobelts are arranged on the sawtooth-shaped structure, and hydroxyapatite nanorods, carbon particles and alumina particles are arranged between adjacent hydroxyapatite nanobelts.

2. A method for preparing the embedded SiC coating with the biological modification on the surface of the carbon/carbon composite material of claim 1 is characterized by comprising the following steps:

step 1: placing the carbon/carbon composite material with the surface embedded with the SiC coating in a high-temperature furnace, and carrying out heat treatment for 15-50 min at 800-1000 ℃ in an air atmosphere to obtain a high-temperature micro-oxidation treatment, and taking out the high-temperature micro-oxidation treatment to enable the surface of the SiC coating to present a rough appearance;

step 2: then completely wrapping the SiC coating embedded on the surface of the carbon/carbon composite material with the rough morphology in the powder, placing the powder in a high-temperature furnace, heating to 700-fold-material 1000 ℃ at the heating rate of 2-10 ℃/min under the argon protection atmosphere, preserving the temperature for 30-120min, and naturally cooling the system;

the powder lot: mixing the hydroxyapatite nanobelt and the alumina according to the mass ratio of 8:1-10: 1;

and step 3: completely immersing the carbon/carbon composite material into the solution, placing the solution in a liquid phase deposition furnace, and depositing the solution at the temperature of 800-;

the solution is as follows: the hydroxyapatite nano-rod and xylene are mixed to prepare a solution with the concentration of 50-200 g/L.

Technical Field

The invention belongs to a biological activation modification method of a carbon/carbon composite material, and relates to an embedded SiC coating for biological activation modification of the surface of the carbon/carbon composite material and a preparation method thereof.

Background

The carbon/carbon composite material has the elastic modulus consistent with that of human bones, so that the carbon/carbon composite material is a bone repair material with great potential. The embedded SiC coating is applied on the surface of the carbon/carbon composite material, so that the release of carbon particles on the surface of the carbon/carbon composite material can be prevented, and the use effect of the carbon/carbon composite material in the human bone repair is improved. However, the surface of the embedded SiC coating presents biological inertia and is difficult to form good chemical bonding with human tissues, so that the embedded SiC coating on the surface of the carbon/carbon composite material needs to be subjected to biological activation modification, so that the carbon/carbon composite material can be used as a biological material for bone repair.

The literature 1 "Huang JF, Zeng XR, LI HJ, et al. flatness of the preparation temperature on the phase, microstructuring and anti-oxidation properties of a SiC coating for composites, Carbon,2004,42(8-9): 1517-.

Document 2, "bear Xinbai, Li Hejun, yellow Jianfeng, etc., research on biomedical carbon/carbon composite silicon carbide coating, proceedings of northwest university of industry, 2003,21(03): 356-359", reports cell reaction of embedding SiC coating on the surface of carbon/carbon composite.

The above documents disclose that the carbon/carbon composite material surface embedded SiC coating can exhibit different thicknesses at different preparation temperatures, and preliminarily demonstrate that the carbon/carbon composite material surface embedded SiC coating is non-toxic. The unmodified embedded SiC coating meets the requirement of nontoxicity and has the possibility of being used as a biological material, thereby providing experimental basis for further carrying out surface biological activation modification on the coating. Meanwhile, the above documents consider that the embedded SiC coating needs to be surface-biologically activated and modified, because the non-toxicity can not meet the requirements of the bone repair material, and the bio-inertness presented on the surface of the embedded SiC coating needs to be modified, so that the carbon/carbon composite material has the possibility of being used as a bone repair material. However, the prior art and the literature do not show a specific biological activation modification method, and what materials and process are adopted to modify the biological inertness presented on the surface of the embedded SiC coating, so that the possibility that the carbon/carbon composite material can be used as a bone repair material cannot be realized.

Disclosure of Invention

Technical problem to be solved

In order to avoid the defects of the prior art, the invention provides an embedded SiC coating for biological activation modification of the surface of a carbon/carbon composite material and a preparation method thereof, wherein a multi-component mosaic structure is constructed on the surface of the embedded SiC coating for surface biological activation modification, and the schematic diagram of the structure is shown in figure 1.

Technical scheme

A carbon/carbon composite material surface biological activation modified embedded SiC coating is characterized in that: SiC coating, carbon particles, alumina particles, hydroxyapatite nanorods and hydroxyapatite nanobelts; the surface of the SiC coating is of a rough sawtooth-shaped structure, hydroxyapatite nanobelts are arranged on the sawtooth-shaped structure, and hydroxyapatite nanorods, carbon particles and alumina particles are arranged between adjacent hydroxyapatite nanobelts.

A preparation method of the embedded SiC coating modified by biological activation on the surface of the carbon/carbon composite material is characterized by comprising the following steps:

step 1: placing the carbon/carbon composite material with the surface embedded with the SiC coating in a high-temperature furnace, and carrying out heat treatment for 15-50 min at 800-1000 ℃ in an air atmosphere to obtain a high-temperature micro-oxidation treatment, and taking out the high-temperature micro-oxidation treatment to enable the surface of the SiC coating to present a rough appearance;

step 2: then completely wrapping the SiC coating embedded on the surface of the carbon/carbon composite material with the rough morphology in the powder, placing the powder in a high-temperature furnace, heating to 700-fold-material 1000 ℃ at the heating rate of 2-10 ℃/min under the argon protection atmosphere, preserving the temperature for 30-120min, and naturally cooling the system;

the powder lot: mixing the hydroxyapatite nanobelt and the alumina according to the mass ratio of 8:1-10: 1;

and step 3: completely immersing the carbon/carbon composite material into the solution, placing the solution in a liquid phase deposition furnace, and depositing the solution at the temperature of 800-;

the solution is as follows: the hydroxyapatite nano-rod and xylene are mixed to prepare a solution with the concentration of 50-200 g/L.

Advantageous effects

The invention provides an embedded SiC coating for biological activation modification of the surface of a carbon/carbon composite material and a preparation method thereof.

The invention has the beneficial effects that: a multi-component mosaic structure is designed on the surface of the embedded SiC coating for surface biological activation modification, the structure is firstly subjected to high-temperature micro-oxidation treatment to enable the surface of the embedded SiC coating to be in a rough sawtooth-shaped structure, and then the surface biological activity of the embedded SiC coating on the surface of the carbon/carbon composite material is endowed by means of the effective permeation of hydroxyapatite nanobelts and alumina particles at high temperature and the high-temperature liquid phase coating of hydroxyapatite nanorods and carbon particles, so that the surface biological activation modification of the embedded SiC coating is completed.

Drawings

FIG. 1: the invention discloses a structural schematic diagram of a SiC coating after biological activation modification

FIG. 2: scanning electron micrograph of induced skeletal mineral generation of surface embedded SiC coating of bioactivated and modified carbon/carbon composite material prepared in example 4 in human simulated body fluid

Detailed Description

The invention will now be further described with reference to the following examples and drawings: