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A porous fiber liquid-absorbent core with in-situ growth of carbon nanotubes on the surface and its preparation method

A carbon nanotube and porous fiber technology, applied in the field of porous fiber liquid absorbent core and preparation, can solve the problems of large backflow resistance and small capillary force, and achieve the effects of increasing backflow resistance, simple manufacturing process and high specific surface area

Active Publication Date: 2021-05-14
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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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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  • A porous fiber liquid-absorbent core with in-situ growth of carbon nanotubes on the surface and its preparation method
  • A porous fiber liquid-absorbent core with in-situ growth of carbon nanotubes on the surface and its preparation method
  • A porous fiber liquid-absorbent core with in-situ growth of carbon nanotubes on the surface and its 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-absorbing core with in-situ growth of carbon nanotubes on the surface and a preparation method thereof; using a multi-tooth turning tool to cut continuous long fibers from a stainless steel rod; cutting the long fibers into short fibers and pressing them into a mold ; Put the mold into a vacuum sintering furnace for solid-phase sintering; take out the stainless steel fiber sintered porous material after the sintering furnace cools to room temperature; clean and pickle the surface of the porous fiber liquid-absorbing core; put the porous fiber liquid-absorbing core into the atmosphere for sintering The furnace uses thermal CVD to grow carbon nanotubes in situ; after cooling to room temperature, the composite porous fiber liquid-absorbing core is taken out, which has a three-dimensional network porous structure with carbon nanotubes with high thermal conductivity on the surface, and has high specific surface area and boiling heat transfer performance. Well, the manufacturing process is simple and the cost is low.

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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Patent Type & Authority Patents(China)
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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