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Method for bidirectional and free control on wettability of surface of biological ceramic

A bioceramic and surface infiltration technology, applied in the field of biomedicine, can solve the problems of short coating timeliness and micro cracks on the ceramic surface, etc., and achieve the effects of high precision preparation controllability, low manufacturing cost, and a wide range of applicable materials

Active Publication Date: 2016-06-15
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The timeliness of increasing the coating is not long, while acid etching is suitable for ceramics containing silicates, and sandblasting is easy to cause micro-cracks on the ceramic surface

Method used

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  • Method for bidirectional and free control on wettability of surface of biological ceramic
  • Method for bidirectional and free control on wettability of surface of biological ceramic
  • Method for bidirectional and free control on wettability of surface of biological ceramic

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preparation example Construction

[0035] The present invention has high-precision controllability of preparation. Aiming at the required specific wettability surface, the contact angle of the material surface can be precisely controlled through the structure model design and the adjustment of the laser process (the material surface can be controlled from super-hydrophilicity 10° to hydrophobicity). Free conversion between 125°); It can also achieve a material with different wetting effects in different areas;

[0036] The present invention can regulate the surface wettability of bioceramic materials without area limitation, and is easy to realize the surface wettability of large-area materials. The method is easy to operate, has low manufacturing cost, and does not require other auxiliary materials; and regulates the surface wettability of bioceramic materials It will not damage the basic phase properties of the material, is safe and reliable, and has a wide range of applicable materials.

[0037] Attached below F...

Embodiment 1

[0040] (1) Measuring the intrinsic contact angle of the material: ZrO 2 Ceramic acetone was ultrasonically cleaned for 1 minute, and then ultrapure water was ultrasonically cleaned 4 times for 1 minute each time. The intrinsic contact angle CA of the material was measured with an OCA20 video optical contact angle measuring instrument to be 70°, such as figure 2 Shown.

[0041] (2) Design the microstructure model based on the basic surface characteristics of the superhydrophilic bioceramics obtained by simulation calculation,

[0042] The arc-shaped groove microstructure can be a ceramic hydrophilic surface feature, and the solid-liquid contact area per unit area can be changed by the curvature of the arc groove, so as to achieve the purpose of controlling the hydrophilic contact angle. The surface feature of the arc-shaped groove microstructure is designed as H 1 1 =20μm, interval b 1 =25μm.

[0043] (3) Choose a high-frequency picosecond laser with a wavelength of 355nm and a pulse...

Embodiment 2

[0046] (1) Measure the intrinsic contact angle of the material: add ZrO 2 Ceramic acetone was ultrasonically cleaned for 1 minute, and then ultrapure water was ultrasonically cleaned 4 times for 1 minute each time. The intrinsic contact angle CA of the material was measured with an OCA20 video optical contact angle measuring instrument to be 70°, such as figure 2 Shown.

[0047] (2) Design a microstructure model based on the basic hydrophobic surface characteristics of bioceramics obtained by simulation calculation. The columnar microstructure is designed to be the characteristic of the hydrophobic surface of the ceramic. By changing the characteristic value of the interval and side length of the columnar structure, the purpose of controlling the hydrophobicity of the bioceramic surface is achieved. The surface features of the columnar microstructure are designed as intervals b 2 =25μm, side length a 2 =20μm, H 2 =40μm.

[0048] (3) A high-frequency picosecond laser with a wavelen...

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Abstract

The invention discloses a method for bidirectional and free control on wettability of the surface of biological ceramic. The method comprises steps as follows: theoretical calculation is performed on biological ceramic structure characteristic values according to a wettability Wenzel model and a Cassie model, and basic characteristics of the hydrophilic or hydrophobic surface of the biological ceramic are determined and obtained; a microstructure model of the biological ceramic is designed according to the basic characteristics of the hydrophilic or hydrophobic surface of the biological ceramic; a short-wavelength picosecond laser with the repetition frequency lower than 1 MHz and the pulse width being in the range of 10-15 ps is selected as a laser source; laser control manufacturing is performed on surface characteristics of an arc-shaped groove microstructure and a columnar microstructure by the aid of the laser source. With the adoption of the method, bidirectional and free control from the super-hydrophilic surface of 10 degrees to the hydrophobic surface of 125 degrees can be performed on the wettability of the surface of the biological ceramic material, meanwhile, the method has the highly precise preparation controllability, and one material can have different wetting effects in different areas; besides, the technological method is easy to operate, low in manufacturing cost and wide in applicable material range, and no other auxiliary materials are required.

Description

Technical field [0001] The invention relates to the field of biomedicine, and in particular to a method for two-way free regulation of the infiltration of the bioceramic surface. Background technique [0002] Bioceramics have good hardness and bending strength as well as excellent biological properties, and they are very popular in the fields of stomatology and implants. In dental clinical applications, it is found that the surface of zirconia ceramics does not contain silicon oxide and its stable chemical properties, so that it cannot be effectively combined with the facing materials, and the hydrolysis of the bonding surface causes the bonding of zirconia and resin to become a bonding system The weakest link in the In the humid and complex biological environment of the oral cavity, if the surface of the zirconia ceramic is incompatible with water, that is, it has hydrophobic properties, it is beneficial to resist the hydrolysis of the bonding interface. In addition, the incre...

Claims

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Application Information

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IPC IPC(8): B23K26/364
CPCB23K26/364
Inventor 季凌飞李健王文豪燕天阳
Owner BEIJING UNIV OF TECH
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