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Hot water non-stick surface structure and preparation method thereof

A technology of interface structure and hot water, which is applied in the field of material science, can solve the problems of micro-nano composite structure collapse and inability to completely resist the impact of reverse hot water, and achieve easy operation and regulation, good industrial application prospects, and good reproducibility Effect

Inactive Publication Date: 2015-09-30
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under SEM, the collapse of the micro-nano composite structure on the surface of the lotus leaf after hot water treatment was observed; in addition, the literature mentioned that the contact angle of hot water on its artificially synthesized super-hydrophobic surface decreased from 160° to about 80°, which shows that the super-hydrophobic Hydrophobic surfaces are not completely resistant to the impact of inverse hot water
[0004] No hot water non-stick superhydrophobic surface has been disclosed in the patents so far, that is, when hot water droplets or hot water flow hit the superhydrophobic surface in a static or dynamic manner, the non-stick superhydrophobicity is still maintained

Method used

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  • Hot water non-stick surface structure and preparation method thereof
  • Hot water non-stick surface structure and preparation method thereof
  • Hot water non-stick surface structure and preparation method thereof

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preparation example Construction

[0033] In a preferred embodiment, the preparation method of the aforementioned superhydrophobic interface structure that does not stick to hot water may include:

[0034] (1) After cleaning the surface of the substrate, dry it with a gas that does not react with the substrate material;

[0035] (2) Place the substrate treated in step (1) in the reaction solution, heat the reaction solution to 25-100°C, and keep it warm for more than 5 minutes, so as to grow and form the nano-array structure on the bottom end surface of the substrate , the reaction solution is a homogeneous solution containing a soluble zinc source substance and a soluble alkaline substance in a molar ratio of 1:6 to 1:10;

[0036] (3) The surface of the nanoarray structure obtained in step (2) is modified with low surface energy substances to form the superhydrophobic interface structure that does not stick to hot water.

[0037] And in a more specific embodiment, this preparation method can comprise:

[003...

Embodiment 1

[0046] 1. Commercially produced 2 mm thick, about 4 cm in area 2 The glass 11 was ultrasonically cleaned with acetone, ethanol, and deionized water for 15 minutes in sequence.

[0047] Blow dry with pure nitrogen to avoid oxidation, and store for later use.

[0048] According to the volume ratio of 1:1, pour the 0.5M zinc nitrate aqueous solution into the 4M sodium hydroxide aqueous solution while stirring to avoid the formation of precipitates. Put the pretreated glass coated with the seed crystal into the reaction liquid with the reverse side up, heat to 90° C. and keep the temperature for 3 hours to obtain the zinc oxide nano-pencil array 13 .

[0049] Surface modification, this step can be achieved by vapor deposition or other modification methods such as first soaking and then drying. Specifically, put the sample to be modified into the o C, after evaporation for 2 hours, take it out after cooling down to room temperature. Or soak in 2% FAS ethanol solution for 2h, t...

Embodiment 2

[0052] 1. A commercially produced copper material 11 with a thickness of 8 mm and an area of ​​about 4 cm2 was selected, and was ultrasonically cleaned with acetone, ethanol, and deionized water for 15 minutes in sequence.

[0053] Blow dry with pure nitrogen to avoid oxidation, and store for later use.

[0054] According to the volume ratio of 1:1, pour the 0.5M zinc nitrate aqueous solution into the 4M sodium hydroxide aqueous solution while stirring to avoid the formation of precipitates. Put the pretreated copper plate into the reaction solution with the reverse side up, heat to 60°C and keep the temperature for 30 minutes to obtain the zinc oxide nanocone structure 12 .

[0055] Surface modification, this step can be achieved by vapor deposition or other modification methods such as first soaking and then drying. Specifically, put the sample to be modified into the o C, after evaporation for 2 hours, take it out after cooling down to room temperature. Or soak in 2% FA...

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Abstract

The invention discloses a hot water non-stick surface structure and a preparation method thereof. The super-hydrophobic interface structure comprises a nano cone array structure formed on the surface of a substrate, wherein the nano array structure comprises a plurality of nano protrusions arranged in an array manner; at least the top of the nano protrusion is provided with a conical structure; the distance between two adjacent nano protrusions is 50-500nm; the top diameter of the nano protrusions is 1-200nm; and the surface of the nano array structure is modified with low surface energy substances. The preparation method is mainly implemented by virtue of a chemical bath deposition method. The super-hydrophobic surface structure disclosed by the invention has good hot water non-stick properties, non-stick impact and instantaneous rebound of hot water drops or hot water flow can be realized, the preparation process is easy to operate and control, any expensive equipment is not needed, and the super-hydrophobic surface structure is low in consumption, environment-friendly, high in reproducibility and short in period, can be prepared in large area and has excellent industrial application prospects.

Description

technical field [0001] The invention relates to a hydrophobic material, in particular to a super-hydrophobic interface structure that does not stick to hot water and a preparation method thereof, belonging to the field of material science. Background technique [0002] Generally, a solid surface with a contact angle of more than 150° and a hysteresis angle of less than 10° is considered to be a superhydrophobic interface. It has important value in thermal, anti-condensation, anti-frosting, etc., which has aroused extensive interest in academia and industry. However, when considering the practical application, the hot water non-stick superhydrophobic interface has great application prospects. For example, the preparation of new materials that prevent hot water scalding, the surface of hot water transportation pipes are designed to be superhydrophobic surfaces that do not stick to hot water, which can effectively reduce drag and energy consumption, and enhance steam condensat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00C08J7/12
Inventor 高雪峰张亚平田健朱杰
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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