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Film with high heat conduction efficiency and antifouling capability and preparation method thereof

A technology with high heat conduction and efficiency, applied in heat exchange equipment, lighting and heating equipment, heat transfer modification, etc., can solve problems such as increasing the cost of heat exchange devices

Inactive Publication Date: 2009-10-14
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of nanoparticles increases the cost of the thermal conversion device

Method used

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  • Film with high heat conduction efficiency and antifouling capability and preparation method thereof
  • Film with high heat conduction efficiency and antifouling capability and preparation method thereof
  • Film with high heat conduction efficiency and antifouling capability and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Electrochemical method: Immerse a pair of aluminum sheets (100mm×50mm×1mm) in a 0.5mol / L sulfuric acid solution in an electrolytic cell at room temperature. The two aluminum sheets are respectively used as the reaction electrode and the counter electrode. The distance is 6cm. Current density control now 10mA / cm 2 React for 3 hours. During the reaction, the temperature of the reaction solution is controlled below 40°C. The oxidized aluminum sheet was washed with deionized water to remove residual sulfuric acid, and then the aluminum sheet was placed in a muffle furnace for 20 minutes, and the temperature of the furnace was controlled at 180°C. Soak the ablated product in deionized water and ethanol for 30 minutes, and then dry it in the air, then directly prepare the hydrophilic Al surface based on the metal Al surface with rod-shaped particles with a diameter of 200nm. 2 o 3 Membrane, the film thickness is about 300nm, and the contact angle between the film and wate...

Embodiment 2

[0045] Electrochemical method: place two cleaned copper sheets in an electrolytic cell with electrolyte solution, the two copper sheets are respectively used as the counter electrode and the working electrode, and the distance between the two electrodes is 5cm. The electrolyte is an ethanol solution of 0.5 mol / L n-tetradecanoic acid. At room temperature, set the voltage of the DC power supply to 5V and react for 3 hours, and the metal surface of the working electrode will deposit Cu[CH 3 -(CH 2 ) 12 COO] 2 . will be deposited with Cu[CH 3 -(CH 2 ) 12 COO] 2 Put the Cu sheet into the muffle furnace for 10 minutes, and the temperature of the furnace is controlled at 100°C. Soak the ablated product in deionized water and ethanol for 20 minutes, and then dry it in the air, then directly prepare a hydrophilic CuO film with a rough structure based on the accumulation of square particles with a diameter of 150 nm on the surface of metallic Cu. , about 100nm behind the film, ...

Embodiment 3

[0047] Hydrothermal reaction method: Coating an ethanol solution containing tetrabutyl titanate with a mass concentration of 5% on the surface of cleaned Cu and nickel-chromium alloy, controlling the temperature of the reaction furnace at 300 ° C, firing in the reaction furnace for 1 hour, Cu and nickel-chromium alloys covered with titania seeds were obtained. Prepare 50 mL of 0.15 mol / L titanium trichloride hydrochloric acid aqueous solution, wherein the mass concentration of hydrochloric acid is 5%. Solid NaCl was added to the solution and supersaturation was achieved. Transfer the solution to a polytetrafluoroethylene-lined stainless steel reactor (temperature probes are installed inside and outside the container to detect the temperature inside and outside the reactor; there are pressurization devices and venting pipes on the lid of the reactor) . At this time, the prepared Cu and nickel-chromium alloy covered with titanium oxide seed crystals are put into the reaction c...

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Abstract

The invention relates to a film with high heat conduction efficiency and antifouling capability for a heater and a preparation method thereof, in particular to a film with special wettability based on the surface of metal or a metal alloy and a preparation method thereof. The film of the invention is obtained on the surface of the metal or the metal alloy for heat exchange by adopting a method combining an electrochemistry method, a hydro-thermal reaction method, a chemical vapor deposition method, a sol-gel method, a laser etching method and chemical vapor deposition, or a method combining laser etching and sol-gel; and by evaluation on the antifouling capability, the boiling process in water and the heat exchange efficiency of the film, various performances of the obtained metal or metal alloy heater containing the film of the invention are markedly improved compared with a metal or metal alloy heater without the film of the invention.

Description

technical field [0001] The invention relates to a film with high heat conduction efficiency and anti-scaling ability for a heater and a preparation method thereof, in particular to a film with special wettability based on a metal or metal alloy surface and a preparation method thereof. Background technique [0002] Heat transfer technology is currently in a critical development period, and the demand for cooling equipment with ultra-high heat flux continues to grow. With the widespread application of lasers, superconducting magnets, high-energy X-rays and ultra-fast computer chip processing technologies, as well as the continuous miniaturization of equipment based on this technology, it is required that these equipment not only have high precision, but also occupy the smallest space. Therefore, the design and heat treatment of core devices are facing new challenges. The ubiquitous air-based cooling systems are effective, but the ever-increasing heat flux will eventually ren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F13/18
Inventor 王景明翟锦宋延林江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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