A kind of nanowire-fluorocarbon composite coating and preparation method thereof

A composite coating and fluorocarbon coating technology, applied in coating, nanotechnology, nanotechnology, etc., can solve the problems of reduced binding force, unfavorable drop-like condensation, and affecting the curing and film-forming performance of coatings, so as to prevent dust and Accumulation of dirt and the effect of solving poor thermal conductivity

Active Publication Date: 2022-07-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the blending method is used, the nanoparticles are randomly dispersed in the coating, and cannot be arranged along the heat flow direction to form an effective heat transfer channel.
Moreover, when the filler content increases to a certain value, it will greatly affect the curing and film-forming properties of the coating, resulting in a decrease in the binding force from level 0 to level 1-2; and the added high surface energy particles will reduce the hydrophobicity of the fluorocarbon coating. Sex, not conducive to the occurrence of droplet condensation

Method used

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  • A kind of nanowire-fluorocarbon composite coating and preparation method thereof
  • A kind of nanowire-fluorocarbon composite coating and preparation method thereof
  • A kind of nanowire-fluorocarbon composite coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The technical scheme of the present invention is as follows: first, use electrochemical deposition method to grow copper nanowires with a certain height on the surface of the metal substrate, then adjust the viscosity of the paint, and use an appropriate spraying process to form a film in the nanowire voids, so as to achieve stable long-term dripping. It solves the problem of poor heat transfer performance while condensing in the form of a condensate. The specific process flow is as follows:

[0059] 1. Substrate pretreatment: Use 800# and 3000# sandpaper to polish the copper substrate (copper substrate) in turn, and polish the surface of the copper substrate. The polished substrate (copper substrate) was ultrasonically cleaned with acetone and ethanol, respectively, and then rinsed with deionized water.

[0060] 2. Electroplating of nanowires: place the copper substrate, porous alumina (PAA) template, filter paper and copper sheet connected to the counter electrode in...

Embodiment 2

[0067]The 1# nanowire surface was constructed, and PFA was sprayed to prepare the 3# nanowire-PFA composite coating. The preparation steps were as follows: the copper substrate was polished with 800# and 3000# sandpapers in turn, and the surface of the substrate was well polished. The ground substrates were ultrasonically cleaned with acetone and ethanol, respectively, and then rinsed with deionized water. The porous alumina (PAA) template (model 450-200), the counter electrode of the filter paper and copper sheet are placed in order and fixed with clips, and the edge of the filter paper is immersed in the plating solution to ensure that the solution can be completely absorbed by the filter paper by capillary action , and evenly distributed in the PAA template. A constant potential was applied between the copper substrate and the counter electrode to electroplate the nanowires. After electroplating for 1100 s, a layer of short copper nanowire arrays was attached to the copper...

Embodiment 3

[0069] Construct the 2# nanowire surface, and spray PFA to prepare the nanowire-PFA composite surface. The difference between this example and Example 1 is that the model of the template used, that is, the spacing of the nanowires, is changed. The preparation steps are as follows: use 800# and 3000# sandpaper was used to polish the copper substrate in turn, and the surface of the substrate was well polished. The ground substrates were ultrasonically cleaned with acetone and ethanol, respectively, and then rinsed with deionized water. The porous alumina (PAA) template (model 450-110), filter paper and the counter electrode of the copper sheet are placed in order and fixed with clips, and the edge of the filter paper is immersed in the plating solution to ensure that the solution can be completely absorbed by the filter paper by capillary action , and evenly distributed in the PAA template. A constant potential was applied between the copper substrate and the counter electrode ...

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Abstract

The invention provides a nanowire-fluorocarbon composite coating and a preparation method thereof. In the method of the invention, a directionally arranged high thermal conductivity nanowire network is introduced into the traditional fluorocarbon coating to prepare the nanowire-fluorocarbon composite coating. The composite coating prepared by the invention can significantly improve the effective thermal conductivity of the fluorocarbon coating, which can reach a maximum of more than 150 times. It solves the problems of poor thermal conductivity, short life and easy dust accumulation of traditional heat exchanger coatings, and can be used in industrial processes such as power generation, petrochemical industry, and seawater desalination.

Description

technical field [0001] The invention relates to the technical field of functional material surface and heat transfer enhancement, in particular, to a nanowire-fluorocarbon composite coating and a preparation method thereof. In particular: the use of high thermal conductivity materials to modify fluorocarbon coatings to prepare composite coatings can improve the effective thermal conductivity and hydrophobic properties of the coating and the bonding force with the substrate, thereby improving the heat transfer performance and anti-accumulation of the heat exchanger. Ash performance. Background technique [0002] At present, heat exchangers are essential equipment in many fields such as petrochemical industry, power generation, refrigeration and so on. However, in the application process, the condensation mode of most equipment is film condensation, and the formed thick liquid film greatly affects the heat transfer performance. In addition, due to the long-term operation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/00B05D7/14B05D7/24B05D1/02B05D3/02C25D1/00B82Y40/00B82Y30/00
Inventor 马学虎李启迅杜宾港刘渊博温荣福兰忠
Owner DALIAN UNIV OF TECH
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