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Wear-resistant superomniphobic material and preparation method thereof

A super-lyophobic and wear-resistant technology, applied in the field of super-lyophobic materials, can solve the problems of easy adhesion of liquid on the wear place, large pores of the porous skeleton, failure of the super-lyophobic surface, etc., and achieve excellent wear resistance, High mechanical strength and long service life

Inactive Publication Date: 2019-05-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the third method uses porous skeleton materials and modifies the inner surface of the skeleton with low surface energy materials to obtain superhydrophobicity and significantly improve wear resistance, they are not completely filled with porous skeletons, only The hydrophobic substance is attached to the skeleton, and the porous skeleton still has a large number of large pores. When the micro-nano rough structure on the surface of the skeleton is damaged due to stress concentration, or the hydrophobic substance on the inner surface falls off by mechanical force, the liquid will easily adhere to it. Abrasion and thus superhydrophobic surface failure
In addition, superhydrophobic materials with porous structures also limit their application fields.

Method used

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  • Wear-resistant superomniphobic material and preparation method thereof
  • Wear-resistant superomniphobic material and preparation method thereof
  • Wear-resistant superomniphobic material and preparation method thereof

Examples

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preparation example Construction

[0051] (2) Preparation of fluorinated epoxy resin

[0052] Take a certain mass ratio of diethylenetriamine and heptafluorobutyric acid, add a certain volume of acetone solution, and then stir to react to form a transparent mixed solution. A certain quality of epoxy resin is added to the above mixed solution and magnetically stirred to obtain a black uniform fluorinated epoxy resin solution.

[0053] (3) Preparation of lyophobic composite liquid

[0054] Take a certain mass ratio of 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane and inorganic nanoparticles, add them to a certain volume of ethanol solution, and stir magnetically to prepare a hydrophobic coating solution similar to paint. Then, the fluorinated epoxy resin, silane coupling agent, and dispersant prepared in step (1) are added to the hydrophobic coating liquid, and magnetically stirred to obtain a lyophobic composite liquid.

[0055] (4) Preparation of super lyophobic materials

[0056] The roughened foamed copper prepared i...

Embodiment 1

[0059] (1) Roughening of foamed copper: First, wash the foamed copper with absolute ethanol and dilute hydrochloric acid with a concentration of 2mol / L for 10 minutes, then repeatedly rinse with deionized water and dry for use; then, soak the sample at room temperature Take the 1mol / L NaOH solution as the anode, use the titanium dioxide as the cathode, and the current density of 0.1A / cm2. After reacting for 10 min, take it out and dry it with cold air to obtain roughened foamed copper.

[0060] (2) Preparation of fluorinated epoxy resin: Take 2g of diethylenetriamine and 8g of heptafluorobutyric acid, add them to 80mL of acetone solution, and then stir and react at a low speed for 10 minutes at 100°C to form a transparent mixed solution. Finally, a certain quality of epoxy resin was added to the above mixed solution, and after magnetic stirring at 60°C for 70 minutes, a black uniform fluorinated epoxy resin solution was obtained.

[0061] (3) Preparation of lyophobic composite solu...

Embodiment 2

[0064] (1) Roughening of foamed iron: Soak the foamed iron in a four-in-one phosphating solution (40min), then take it out and dry it (not washable) to obtain a dark gray roughened phosphating film.

[0065] (2) Preparation of fluorinated epoxy resin: Take 2g of diethylenetriamine and 8g of heptafluorobutyric acid, add them to 80mL of acetone solution, and then stir and react at 80°C for 20min at low speed to form a transparent mixed solution. Finally, a certain quality of epoxy resin was added to the above mixed solution, and after magnetic stirring at 50°C for 70 minutes, a black uniform fluorinated epoxy resin solution was obtained.

[0066] (3) Preparation of lyophobic composite solution: Take 1.2g of 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane and 4g of titanium dioxide nanoparticles (40nm), add them to 40mL of ethanol solution, at 40℃, pH= After magnetic stirring for 2 hours under 5 conditions, hydrophobic titanium dioxide nanoparticles were prepared. Then, add 0.9g of flu...

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Abstract

The invention discloses a wear-resistant superomniphobic material and a preparation method thereof. The wear-resistant superomniphobic material comprises a porous framework material, a low-surface-energy substance and a cross-linking agent. The preparation method comprises the steps of conducting roughing treatment on the porous framework material; conducting full filling combination on the low-surface-energy substance, the cross-linking agent and the roughed porous framework material under the vortex and ultrasonic effect; and finally, conducting drying to obtain the wear-resistant superomniphobic material. The superomniphobic material prepared through the method has high wear resistance and tensile resistance. Moreover, operation is simple and efficient, and the superomniphobic materialis low in cost, has wide applicability and can be hopefully applied to large-scale industrial production.

Description

Technical field [0001] The invention belongs to the technical field of super lyophobic materials, and particularly relates to a wear-resistant super lyophobic material and a preparation method thereof, and more specifically, to a super lyophobic material whose surface mechanical abrasion effect is negligible and a preparation method thereof. Background technique [0002] Super lyophobic materials have broad application prospects in many fields (such as anti-fouling, anti-icing and snow surfaces and microfluidic systems), and are increasingly becoming the focus of attention of engineers and scientists. A super-liquid surface refers to a surface with a contact angle of more than 150° and a rolling angle of less than 10°. When liquids such as water or oil drop onto the inclined surface, they can automatically roll down together with dust or pollutants. At present, although many artificial super lyophobic surfaces have been prepared, only a few of them can meet the actual application...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D7/24C08J9/42C08J9/36
Inventor 郑泉水青勇权
Owner TSINGHUA UNIV
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