Method for preparing corrosion-resistant super-hydrophobic coating and product thereof

A super-hydrophobic coating and corrosion-resistant technology, which can be used in coatings, metal material coating processes, devices for coating liquids on surfaces, etc., and can solve problems such as high cost and poor mechanical strength.

Inactive Publication Date: 2011-03-30
SIEMENS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In order to solve the problems of high cost and / or poor mechanical strength in the coating used in the above-mentioned prior art, the present invention provides a coating method, which not only saves cost, but also improves mechanical strength and corrosion resistance , with superhydrophobic properties, for the surface of these small inner diameter tubular devices

Method used

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  • Method for preparing corrosion-resistant super-hydrophobic coating and product thereof
  • Method for preparing corrosion-resistant super-hydrophobic coating and product thereof
  • Method for preparing corrosion-resistant super-hydrophobic coating and product thereof

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preparation example Construction

[0032] From the perspective of the entire coating preparation method, the processing temperature of the system is safe, below any important melting point of iron metal. The coating is an inert coating, which is not only corrosion-resistant, but also does not react with protein or hemoglobin, and can be widely used in various biochemical detections. The coated probe prepared by the method of the invention can be sterilized by high pressure and chemically, and is also suitable for microwave or gamma ray sterilization. In conclusion, the ceramic, silicon compound, metal oxide or metal nitride coating is a very durable protective coating for a variety of biochemical detection probe materials such as polished stainless steel. Also routinely used in deep small hole IDs and guaranteed to have a uniform conformal surface.

[0033] In the most preferred embodiment, the formed ceramic, silicon compound, metal oxide or metal nitride coating is further modified with a fluoroalkyltrimetho...

Embodiment 1

[0038] Preparation and Characterization of Aluminum Oxide Coating

[0039] The aluminum oxide coating is formed on the surface of the probe with a length of 30 cm and an inner diameter of 0.2 cm by the sol-gel method, and the coating after drying at room temperature is heat-treated at 100-800 ° C for 1-8 hours to form a microscopic particle size of 10 nanometers to 2 microns. structure to increase its surface roughness.

[0040] The fluoroalkyltrimethoxysilane is grafted on the prepared alumina coating to cause a condensation reaction to remove water. The reaction process is as follows: figure 2 As shown, silane was chemically grafted on the surface of the coating to obtain a silane-modified coating.

[0041] The contact angle of the coating to water was measured to be 150°.

Embodiment 2

[0043] Preparation and Characterization of Titanium Dioxide Coating

[0044] A titanium dioxide coating is formed on the surface of the probe with a length of 20 cm and an inner diameter of 0.17 cm by the sol-gel method, and the coating after drying at room temperature is heat-treated at 600 ° C for 8 hours to form a microstructure of 100 nanometers to 2 microns to improve its Surface roughness.

[0045] The fluoroalkyltriethoxysilane is grafted on the prepared titanium dioxide coating, so that condensation reaction occurs, water is removed, and the silane forms a chemical bond to connect on the coating surface to obtain a silane-modified coating.

[0046] The contact angle of the coating to water was measured to be 150°.

[0047] It can be seen that the coatings of ceramics, silicon compounds, metal oxides or metal nitrides prepared in the above examples have super-hydrophobic properties, and their hydrophobicity and inertness greatly reduce the adsorption of samples and red...

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Abstract

The invention provides a method for preparing a corrosion-resistant super-hydrophobic coating and a product thereof. To improve corrosion resistance and reduce the residue of a previous sample of devices such as a sampling probe and the like in a multiple sampling process, the invention provides a method for preparing a corrosion-resistant super-hydrophobic coating for the surface of a small-internal diameter tubular device and a prepared product thereof. The super-hydrophobic coating is a ceramic, silicon compound, metal oxide or metal nitride coating. The ceramic, silicon compound, metal oxide or metal nitride coating is formed on the surface of the small-internal diameter tubular device (such as the sampling probe and a probe) by a sol-gel method, and the coating has high corrosion resistance and super hydrophobicity, and has higher mechanical strength and better effect of reducing residuals than polytetrafluoroethylene and dimethylbenzene coatings in the prior art. Compared with that of a platinum coating in the prior art, the coating cost is greatly reduced.

Description

technical field [0001] The invention relates to a method for preparing a corrosion-resistant superhydrophobic coating and a product thereof. Background technique [0002] Small-diameter tubular devices such as stainless steel probes, sampling needles, and needles for transferring solutions are widely used in biochemical testing instruments and health care diagnostic instruments. Due to its special use environment-requires frequent contact with sample solutions, detection errors caused by corrosion and residual samples become a major problem in the use of these small inner diameter tubular devices, which will affect the accuracy and precision of high-performance detection, especially In the case of high-throughput testing. The residue of the sample is mainly caused by the interaction between the probe surface and the fluid, including the ionic interaction between the sample and metal materials (such as ionic compounds or basic compounds) and the interaction between the sampl...

Claims

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Application Information

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IPC IPC(8): B05D5/08C23C20/08
Inventor 曹雷
Owner SIEMENS CHINA
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