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Preparation method of titanium alloy surface PTFE-SiO2 super-hydrophobic coating

A super-hydrophobic coating, PTFE technology, applied in the direction of coating, can solve the problems of complex process, high cost, difficult large-scale industrial application, etc., to achieve the effect of good coating effect and simple production process

Pending Publication Date: 2021-09-28
CIVIL AVIATION FLIGHT UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Common superhydrophobic coating preparation methods include self-assembly method, particle filling method, sol-gel method, electrochemical deposition method, etc., but the complicated process and high cost make it difficult for these methods to achieve large-scale industrial application

Method used

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  • Preparation method of titanium alloy surface PTFE-SiO2 super-hydrophobic coating
  • Preparation method of titanium alloy surface PTFE-SiO2 super-hydrophobic coating
  • Preparation method of titanium alloy surface PTFE-SiO2 super-hydrophobic coating

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Embodiment 1

[0027] The embodiment of the present invention provides a titanium alloy surface PTFE-SiO 2 The preparation method of the superhydrophobic coating is mainly divided into two steps: the preparation of the coating and the spraying of the coating.

[0028] Wherein, the preparation process of the coating is as follows.

[0029] Spherical SiO with a diameter of 100 nm 2 Mix the particles with absolute ethanol, drop a small amount of KH550, stir the mixed solution for 15 minutes with a magnetic stirrer, put the mixed solution in a vacuum drying oven, and keep it warm at 60°C for 24 hours to make the SiO 2 The granules are dried to powder form. Take 0.2g, 0.5g, 0.8g, 1.1g of dried SiO 2 Mix the powder with 10ml of deionized water, stir with a magnetic stirrer at 30°C and 300r / min for 15min, then add 5ml of PTFE solution to the solution, and continue stirring with a magnetic stirrer at 30°C and 300r / min for 15min, A multi-component coating containing fluorine and nanoparticles is ...

Embodiment 2

[0039] This example is based on "0.8g SiO 2 +10ml H2O+5ml PTFE" configuration of coating components to prove the coating's water impact resistance, acid and alkali corrosion resistance and anti-icing performance at low temperature.

[0040] For the water impact resistance of the coating, the titanium alloy substrate containing the superhydrophobic coating is placed on the surface of the semiconductor refrigeration platform, and the needle of the micro quantitative pump is 40mm away from the surface of the substrate. The micro quantitative pump works at an output flow rate of 100mL / h, so that water droplets with a diameter of Xmm and 2.5mm continuously impact the coating surface for 30min.

[0041] At room temperature, the contact between water droplets and the coating surface and the rebound process are as follows: image 3 shown.

[0042] The static contact angle of the coating surface after the test is shown in Table 2.

[0043] Table 2 Changes in the static contact angle...

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Abstract

The invention discloses a preparation method of a titanium alloy surface PTFE-SiO2 super-hydrophobic coating, which comprises the following steps: S1, mixing dried SiO2 powder with deionized water, stirring for 15 minutes by using a magnetic stirrer at 30 DEG C and 300 r / min, adding a PTFE solution into the solution, and continuously stirring for 15 minutes by using the magnetic stirrer at 30 DEG C and 300 r / min to obtain a coating containing fluorine and nano-particles, wherein the ratio of the mass of the SiO2 powder to the volume of the deionized water to the volume of the PTFE solution is (0.6-0.9) g: 10ml: 5ml; and S2, the titanium alloy is polished to be smooth through abrasive paper, acetone, absolute ethyl alcohol and deionized water are sequentially used for conducting ultrasonic cleaning on the surface of the aluminum alloy for 5 min, then the surface of the aluminum alloy is dried, the coating is sprayed to the surface of the titanium alloy, and the super-hydrophobic coating is obtained after the coating on the surface of the titanium alloy is cured. The method has the advantages of simple process and excellent performance.

Description

technical field [0001] The invention mainly relates to the related technical field of superhydrophobic coating, in particular to a PTFE-SiO coating on a titanium alloy surface 2 Preparation method of superhydrophobic coating. Background technique [0002] Superhydrophobic coating refers to the coating whose static contact angle with water is greater than 150 degrees and the rolling contact angle is less than 10 degrees. The excellent surface properties of superhydrophobic coatings, such as self-cleaning, waterproof, anti-icing, anti-pollution, etc., make them have broad application prospects in social production activities. [0003] Common superhydrophobic coating preparation methods include self-assembly method, particle filling method, sol-gel method, electrochemical deposition method, etc., but the complicated process and high cost make it difficult for these methods to achieve large-scale industrial application. Therefore, it is of great application value and practical...

Claims

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Application Information

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IPC IPC(8): C09D127/18C09D7/61
CPCC09D127/18C09D7/61C08K2201/005C08K3/36
Inventor 邱超李梦韩明炜安斯奇赖安卿
Owner CIVIL AVIATION FLIGHT UNIV OF CHINA
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