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Porous fiber liquid absorption core with carbon nano tubes grown on surface in situ and preparation method

A carbon nanotube and porous fiber technology is applied in the field of porous fiber absorbent core and preparation, which can solve the problems of large backflow resistance and small capillary force, and achieve the effects of preventing local overheating, simple manufacturing process and uniform temperature distribution.

Active Publication Date: 2020-09-18
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Different types of liquid-absorbing cores have different characteristics, such as the groove type has small return resistance, but the capillary force is small; the powder sintered type has large capillary force, but the return resistance is also large

Method used

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  • Porous fiber liquid absorption core with carbon nano tubes grown on surface in situ and preparation method
  • Porous fiber liquid absorption core with carbon nano tubes grown on surface in situ and preparation method
  • Porous fiber liquid absorption core with carbon nano tubes grown on surface in situ and preparation method

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with specific embodiments.

[0025] The preparation process of the porous fiber liquid-absorbent core with in-situ growth of carbon nanotubes on the surface of the present invention is as follows:

[0026] Stainless steel fibers prepared by turning method. First, use alkaline degreaser to clean the stainless steel bar, and then cut and remove the surface scale after clamping it on the lathe. Then replace it with a multi-tooth cutter with a large blade inclination angle, and cut stainless steel fibers on a lathe. The knives are machined from ultra-hard high-speed steel.

[0027] Cut the stainless steel fibers with a diameter of about 70-150 μm to a length of about 10mm; wash the short stainless steel fibers with a NaOH solution with a mass concentration of 5%-10% for 5-10min, and then wash them with deionized water and place them in a volume concentration 5-10% dilute HC 1 Soak in the solu...

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Abstract

The invention discloses a porous fiber liquid absorption core with carbon nano tubes grown on the surface in situ and a preparation method. A multitooth turning tool is used for cutting continuous long fibers out of a stainless steel bar; the long fibers are cut into short fibers and pressed into a mold; the mold is placed in a vacuum sintering furnace for solid-phase sintering; after the sintering furnace is cooled to room temperature, the stainless steel fiber sintered porous material is taken out; the surface of the porous fiber liquid absorption core is washed and pickled; the porous fiberliquid absorption core is placed in an atmosphere sintering furnace, and the carbon nano tubes are grown in situ through heat CVD; and the composite porous fiber liquid absorption core is taken out after being cooled to room temperature. The porous fiber liquid absorption core is provided with a three-dimensional network porous structure with the high-heat-conductivity carbon nano tubes attachedto the surface, and has the advantages of being large in specific surface area, good boiling heat transfer performance, simple in manufacturing process, low in cost and the like.

Description

technical field [0001] The invention relates to the field of enhanced heat exchange and liquid-absorbing cores, in particular to a porous fiber liquid-absorbing core with in-situ growth of carbon nanotubes on the surface and a preparation method thereof. Background technique [0002] Microelectronics and optoelectronics technology has become the core technology of the current high-tech and information industries. With the continuous development of microelectronics and optoelectronic chips in the direction of high integration and high performance, microelectronics and optoelectronic products are also developing in the direction of miniaturization, high integration and portability. Accompanied by high-performance microelectronic devices is high heat flux density, which puts forward higher requirements for heat dissipation. At this stage, the heat flux density of high-performance microprocessors can be as high as 100W / cm2, and the heat flux density of high-power LED chips can ...

Claims

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Application Information

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IPC IPC(8): B22F3/11C23C16/26B82Y40/00H01L23/373
CPCB22F3/002B22F3/1017B22F3/11B82Y40/00C23C16/26H01L23/3733
Inventor 何子聪万珍平段家超曾繁铿
Owner SOUTH CHINA UNIV OF TECH
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