Method for manufacturing hydrophobic surface through laser selective molten metal nanoparticle solution additive manufacturing in air environment

An air environment, additive manufacturing technology, applied in metal material coating process, additive manufacturing, additive processing, etc., can solve the problems of low hydrophobic surface strength, difficult mass production and application, weak non-covalent bonds, etc. Achieve the effect of low property requirements, high controllability and high stability

Active Publication Date: 2017-06-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This puts forward high requirements on the performance of the substrate and the original materials for assembly, and because the assembly uses weak non-covalent bonds, the strength of the formed hydrophobic surface is low, making it difficult to mass-produce and apply

Method used

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  • Method for manufacturing hydrophobic surface through laser selective molten metal nanoparticle solution additive manufacturing in air environment
  • Method for manufacturing hydrophobic surface through laser selective molten metal nanoparticle solution additive manufacturing in air environment
  • Method for manufacturing hydrophobic surface through laser selective molten metal nanoparticle solution additive manufacturing in air environment

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specific Embodiment approach 1

[0023] Specific Embodiment 1: A method for additively manufacturing a hydrophobic surface by laser selective melting of a metal nanoparticle solution in an air environment. The method for preparing a hydrophobic surface in this embodiment is to first configure a metal nano-mixed solution, and evenly coat the surface of the metal substrate with After laying a layer, selective laser sintering is used to obtain a surface structure with hydrophobic properties on the surface; the specific steps of the method are as follows:

[0024] Step 1: Prepare metal nano-mixed solution, disperse 20.8wt% polyvinylpyrrolidone (viscosity K30, relative molecular mass Mr 10000) and 46.2wt% nano-metal powder (particle diameter less than 100nm) in 33wt% solvent, ultrasonic Evenly dispersed;

[0025] Step 2: Ultrasonic cleaning of the stainless steel substrate with absolute ethanol, acetone, sodium hydroxide solution and secondary water in sequence and drying in the air;

[0026] Step 3: Evenly coat ...

specific Embodiment approach 2

[0030] Specific embodiment 2: The method of laser selective melting of metal nanoparticles solution additive manufacturing hydrophobic surface described in specific embodiment 1 in the air environment, in step 1, the nano metal powder is copper, gold, silver, titanium or nickel metal, Or one of the oxides of the above metals.

specific Embodiment approach 3

[0031] Embodiment 3: In Embodiment 1 or 2, the method for additively manufacturing a hydrophobic surface by laser selective melting of metal nanoparticle solution in an air environment, in step 1, the solvent is ethylene glycol, ethanol or glycerol.

[0032] The principle of the present invention is (taking copper metal as an example): copper nanoparticles have a low melting point due to the size effect, and the copper nanoparticles are dispersed in ethylene glycol under the action of polyvinylpyrrolidone dispersant to form a solution. Prevents agglomeration and precipitation of copper nanoparticles. The copper nanometer mixed solution is evenly spread on the surface of the substrate. Under the action of the laser, the metal particles absorb heat and melt and combine with the stainless steel substrate to create a certain micron-scale structure. Due to the high proportion of copper nano powder in the mixed solution, copper nanoparticles adhere to the surface after melting and ...

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Abstract

The invention discloses a method for manufacturing a hydrophobic surface through laser selective molten metal nanoparticle solution additive manufacturing in air environment, and belongs to the technical field of hydrophobic surface preparation. The method comprises the steps that a metal nanometer mixed solution is prepared; a stainless steel substrate is cleaned; the stainless steel substrate is placed near the focal distance position of a selective laser melting manufacturing device; laser scanning is carried out, and nanometer metal powder and the stainless steel substrate are molten together; the obtained surface hydrophobic structure is cleaned; and an ethanol solution of trifluorooctyl triethoxysilane is used for modifying the surface hydrophobic structure. The method has the advantages that the strength is high, stability is high, flexibility is extremely high, operation is convenient, the requirements for equipment are low, the manufacturing cost is low, and the requirements for base materials are low; and the method can be implemented in air and has low environment requirements.

Description

technical field [0001] The invention belongs to the technical field of hydrophobic surface preparation, and in particular relates to a method for additively manufacturing a hydrophobic surface by laser selective melting of a metal nanoparticle solution in an air environment. Background technique [0002] Hydrophobic surface is a functional surface that repells water. Water droplets cannot slide and spread on the surface, but keep ball rolling, so as to achieve the effect of rolling self-cleaning. The lotus leaf in nature is a typical representative of this material. Due to the special wettability of this functional surface, it has a wide range of potential applications in the fields of self-cleaning, anti-corrosion, anti-fog, and fluid drag reduction. It is found that specific roughness and low surface free energy are two necessary conditions for hydrophobic surfaces to achieve their superhydrophobicity. At present, the main methods for manufacturing hydrophobic structures...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00B22F3/105B33Y10/00
CPCC23C24/106B33Y10/00B22F10/00B22F1/107B22F10/62B22F10/38B22F10/64B22F10/28B22F10/20B22F10/50B22F10/68Y02P10/25
Inventor 刘俊岩王鑫剑王扬
Owner HARBIN INST OF TECH
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