TW561207B - Carbon fiber with high thermal conductivity - Google Patents

Abstract

A carbon fiber with a high thermal conductivity mainly is formed by coating a PAN (poly acrylic nitrile) based carbon fiber with a bituminous derivative or a polymer material, followed by carbonization and graphitization; the produced carbon fiber displays excellent structural strength and thermal conductivity, and can be used in the formation of a composite device with a high thermal conductivity.

Description

561207 __ 皇 号 91112487 illegitimate April revision __ V. Description of the invention (1) '~~~' ~ " Summary of Invention The present invention relates to a "carbon fiber with high thermal conductivity", especially a kind of carbon fiber with high thermal conductivity. Carbon fiber structure made of polypropylene (poly acrylic nitriie, PAN) bitumen or high molecular polymer raw material, and then carbonized and graphitized is not only used for the molding of composite materials with high thermal conductivity, but also can be developed. The characteristics of high strength and high thermal conductivity can be added to λ through general process technology, which effectively simplifies the production process of high thermal conductivity composite components and reduces the cost of production, which makes it significantly practical. "Background of the Invention" According to the general electronic products are mostly installed with various pieces: 件 is: to ensure the stability of the quality and life of electronic parts, in addition to the circuit design and parts configuration of the shovel with eight v parts, The flexible n 1, and s ^ are provided by installing a cooling device such as a cooling fan, etc. to achieve the purpose of heat conduction and heat dissipation. ^ Part thermal conductivity

Since the compound material itself is made of thermally conductive or thermally conductive components, the

The demand for heat dissipation has continued to increase, so how to: "miniaturize" to improve the thermal conductivity to meet the market, ten pairs of existing composite materials in view of this, the inventor simply has his urgency to maintain it Research and integrate the idea, and invented a long-term for various carbon-dimensional coated asphalt-extended biological or high-molecular polymers = a carbon fiber structure made of PAN-based carbonization treatment, not only can be 3: Thermally conductive composite

561207 — Case number 91112487 V. Description of the invention (2)

Correction parts are molded to make use of the characteristics of composite materials and high thermal conductivity, and can be implemented through general process technology, which can effectively simplify the production process of high thermal conductivity composite components, and reduce the cost of production, making it an excellent industry Exploitability and practical value. "Objective of the Invention" For this reason, the carbon fiber of the present invention is formed by using a layer of bitumen to cover a layer of pitch with carbonized and graphitized carbon fibers to obtain a composite material with a high height. The secondary visual dimension of the present invention is used in advance. The method of coating carbon fiber for making composite materials is the purpose of the original.

The main purpose is to provide a coating technology with high thermal conductivity. After PAN-based canning of biological or polymer raw materials, it can be used to make the required carbon fiber composite materials to make the thermal conductivity. '俾 can provide a variety of methods that require high thermal conductivity 0, in providing a carbon fiber with high thermal conductivity and the technology of forming high thermal conductivity = graphitization technology, compared with the conventional high thermal conductivity, simplify the production process effectively In order to make the reviewing committee better understand the present invention, and cooperate with the diagrams and figures to achieve a detailed description of the effect, please refer to the "Specific Embodiment Description" for further understanding. I give you a% '

Page 6 561207-91112487 _ year is the month < the day is modified __ V. Description of the invention (3) Please refer to the first to third figures, which are schematic diagrams of the structure of the carbon fiber of the present invention, which is mainly based on PAN-based carbon fiber ( 1〇) Coating (coating). After the final asphalt or biopolymer raw material (20) or other attachable asphalt mesophase or mesophase material, carbonization and graphitization It is processed to make use of the characteristics of high thermal conductivity, and thereby the thermally conductive carbon fiber (A) of this composition has good thermal conductivity, and can be used for molding various composite materials that require high thermal conductivity. In addition, it should be specifically stated that when using the thermally conductive carbon fiber (A) of the present invention to make composite materials, it is only necessary to coat the prepared P AN-based carbon fiber (10) in advance—asphalt-based biopolymer or polymer polymerization. After the raw material (20) is carbonized and graphitized, it can be implemented in general process technology. The general process technology includes the use of the thermally conductive carbon fiber (A) of the present invention to be integrally formed with a reinforcing material such as resin. Technology without special or specialized technology, the technical threshold for its production is low. In addition, the method of using the PAN-based carbon fiber (10) to cover the raw material of green or biological polymer, and then subjecting it to carbonization and graphitization treatment can not affect the original of the PAN-based carbon fiber (10). Under the physical properties, it is very fast and easy to manufacture, and can effectively reduce the cost of production. In addition, the high thermal conductivity of the physical properties makes it possible to have a multiplier effect on the production of composite materials with high thermal conductivity coefficients, such as implementation on heat sink When components with high thermal conductivity are needed, the characteristics of composite materials and high thermal conductivity can be obtained at the same time, which not only simplifies the production process of high thermal conductivity composite components, but also reduces production costs, and has significant practical effects. In order for the reviewing committee to understand the practicability of the case, the following examples are provided.

Page 7 561207 Case number 91112487 V. Description of invention (4) Description:

Example 1 ······································································································································································ 丁 · 〇〇〜300〇I, 2 to 5 hours, stepwise temperature rise to 200-3000 (TC, 2 to 10 hours of graphitization, and then the surface is further inking high-strength carbon fiber. Asphalt mesophase material ( mesophase) has better thermal properties. If bitumen itself is used, it needs to undergo a mesophase process in situ to achieve high thermal conductivity. The thermal conductivity of the generated carbon fiber is above 100ksi and the thermal conductivity is 2 〇_2〇〇w / ", depending on the thickness of the graphite layer, generally different between Bu 20. The powder coating and heat treatment are designed in a continuous production form. Example 2: T-70 0 PAN-based carbon fiber Instead of T-300 carbon fiber, the thermal conductive fiber has a tensile strength of 150 ksi or more and a thermal conductivity of 20-200 W / m \. Example 3: Polyimide (ρ ο 1 yimide) is dissolved in an organic solvent and impregnated in T-3 0 0ΡΑΝ based carbon fiber surface. Put the impregnated fiber into the oven Medium heat to

Page 8 561207 _ Case No. 91112487 V. Description of the invention (5) Year of birth,

Correct 100-300 ° C for 2-10 hours, then further increase the temperature to 2000-3000 ° C, graphitize for 2-10 hours, and obtain thermally conductive carbon fibers. The fiber has a tensile strength of 100 ks i or more, and a thermal conductivity of 50-500 W / m \. Embodiment 4: A liquid crystal polymer (L C P), such as polyimide or polyfluorene polymer, is impregnated on a PAN-based carbon fiber, and the graphitization process is the same as above. In summary, the general production process of the fiber-covered inking treatment element forming process is useful and useful. The patented technology that is required to be used is hereby used in the present invention. Based on this benefit, the principle is clear. The principle is to use a range of high-conductivity organisms or high-carbon fibers to implement the implementation and reduce health, and it is also a patent application. If the above-mentioned carbon fibers are combined with thermal properties in accordance with the present description, a carbon molecular polymer raw material is provided, which is then carbonized and stone structured. It can not only be used for composite materials with high thermal conductivity and high thermal conductivity. Characteristics, and can effectively simplify the production cost of high thermal conductivity composite components through month b, so that the overall industry has a solid structure and has not been seen in books or publications, please read the book of the fishing bureau, as soon as possible. Specific embodiments and operations of the invention: j: the changes you want to make, the results; the spirit covered by the explicit form 'should be 561207, amendment number 91112487, a simple illustration of the "simple description of the drawing", the first diagram is It is a schematic structural sectional view of the carbon fiber of the present invention. The second figure is a schematic diagram of the coating process of the carbon fiber of the present invention. The third picture is a schematic diagram of the carbonization and graphitization process of the carbon fiber of the present invention. "Illustration of drawing number" (A) · · · (10)-· (20) · · · Thermally conductive carbon fiber PAN-based carbon fiber pitch biodegradation or polymer Polymer raw material

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Claims (1)

561207 — Amendment No. 91112487 6. Application for Patent Scope 1. A kind of carbon fiber with high thermal conductivity, which is mainly coated with polypropylene (PAN) -based carbon fiber. Asphalt, bituminous biomass or high score :, After the raw material is formed, it is further formed by carbonization and graphitization treatment; thereby: The carbon fiber has excellent high thermal conductivity, and its thermal conductivity is 20 ~ 50 0 9 / meter K. 2 fibers, 3 fibers, 4 fibers, high scores, according to the first scope of the patent application. Among them, the covering raw material is Wool, according to the first scope of the patent application. The thickness of the coating layer after graphitization, according to the first scope of the patent application. The high-molecular polymer is a carbon green mesophase powder with high thermal conductivity as described in the polymerization item. The carbon degree with high thermal conductivity mentioned in item is between 1 ~ 20 // m. High thermal conductivity carbon imine or polyester with liquid crystal characteristics