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High-conductivity carbon fiber applied to touch screen as well as preparation method and application of high-conductivity carbon fiber

A high-conductivity, touch-screen technology, applied in fiber processing, plant fiber, fiber chemical characteristics, etc., can solve the problem of limiting the application range of viscose-based carbon fiber, low tensile strength of viscose-based carbon fiber, and easy brittleness of viscose fiber. and other problems, to achieve the effect of good elastic modulus, high degree of thinning and high tensile strength

Inactive Publication Date: 2021-08-13
SHENZHEN HUADINGXING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the related technology, the inventor thinks that because the graphitization of viscose fiber is carried out under high temperature environment, microcrystalline structure is formed in the graphitization process of viscose fiber, so that the crystal size of viscose fiber increases rapidly in the graphitization process, so that viscose fiber It is easy to become brittle after graphitization, which makes the tensile strength of viscose-based carbon fiber lower, which limits the application range of viscose-based carbon fiber. Therefore, there is still room for improvement

Method used

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  • High-conductivity carbon fiber applied to touch screen as well as preparation method and application of high-conductivity carbon fiber
  • High-conductivity carbon fiber applied to touch screen as well as preparation method and application of high-conductivity carbon fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of highly conductive carbon fibers applied to a touch screen comprises the following steps:

[0042] Step (1), pretreatment: the viscose fiber of 10kg is through washing 20min, by the hot air drying of 45 ℃, first use the ammonia solution of 5% as pH adjuster with mass concentration, regulate the magnesium molybdate that mass concentration is 2% The pH value of the solution is 10, and then the viscose fiber is immersed in the molybdate solution, the temperature of the molybdate solution is controlled at 85°C, and the temperature is kept for 3 hours. %, followed by drying in an oven at 50°C for 0.5h;

[0043] Step (2), pre-oxidation: control step (1) after the draft rate of the viscose fiber is 0.5%, the viscose fiber enters the pre-oxidation furnace, and the pre-oxidation furnace is heated to 130 DEG C at a heating rate of 0.5 DEG C / min, Keep warm for 15 minutes;

[0044] Step (3), carbonization: adjust the stretch rate of the viscose fiber after st...

Embodiment 2

[0047] A preparation method for a highly conductive carbon fiber applied to a touch screen, comprising the following steps:

[0048] Step (1), pretreatment: the viscose fiber of 10kg is through washing 25min, by the hot air drying of 47 ℃, first use the ammonia solution that mass concentration is 4% as pH adjuster, the ammonium molybdate that regulates mass concentration is 5% The pH value of the solution is 9, then the molybdate solution in which the viscose fiber is immersed, the temperature of the molybdate solution is controlled to be 88°C, and the heat preservation is soaked for 3.5h. 85%, followed by drying in an oven at 55°C for 1h;

[0049] Step (2), pre-oxidation: control the stretch rate of the viscose fiber treated in step (1) to 1%, the viscose fiber enters the pre-oxidation furnace, and the pre-oxidation furnace is heated to 140°C at a heating rate of 0.8°C / min , keep warm for 12 minutes;

[0050] Step (3), carbonization: the stretch rate of the viscose fiber af...

Embodiment 3

[0053] A preparation method for a highly conductive carbon fiber applied to a touch screen, comprising the following steps:

[0054] Step (1), pretreatment: the viscose fiber of 10kg is through washing 22min, by the hot air drying of 50 ℃, first use the ammoniacal solution that mass concentration is 3% as pH adjuster, regulate mass concentration and be 4% potassium molybdate The pH value of the solution is 8, and then the viscose fiber is immersed in the molybdate solution, the temperature of the molybdate solution is controlled at 90°C, and the temperature is kept for 4 hours. %, followed by drying in an oven at 58°C for 2h;

[0055] Step (2), pre-oxidation: control the stretch rate of the viscose fiber treated in step (1) to 2%, the viscose fiber enters the pre-oxidation furnace, and the pre-oxidation furnace is heated to 150° C. at a heating rate of 1° C. / min , keep warm for 15 minutes;

[0056] Step (3), carbonization: adjust the draft rate of the viscose fiber after the...

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Abstract

The invention relates to the field of carbon material preparation, and particularly discloses high-conductivity carbon fiber applied to a touch screen as well as a preparation method and application of the high-conductivity carbon fiber. The preparation method of the high-conductivity carbon fiber applied to the touch screen comprises the following steps of (1), performing pretreatment: firstly washing and drying viscose fiber, then immersing the viscose fiber into a molybdate solution with the mass concentration of 2-5%, and performing dipping, rolling and drying; (2) performing pre-oxidation: performing heating and heat preservation on the viscose fiber treated in the step (1); (3) performing carbonizing: introducing hydrogen chloride gas, performing heating and heat preservation on the viscose fiber treated in the step (2), introducing nitrogen, and then performing heating and heat preservation on the viscose fiber; (4) performing graphitizing: introducing ammonia gas, performing heating and heat preservation on the viscose fiber treated in the step (3), introducing ammonia gas and helium gas, performing heating and heat preservation on the viscose fiber, taking out the viscose fiber, and performing cooling to obtain the high-conductivity carbon fiber applied to the touch screen. The method has the advantage of improving the tensile strength of the viscose-based carbon fiber.

Description

technical field [0001] The present application relates to the field of carbon material preparation, and more specifically, it relates to a high-conductivity carbon fiber applied to a touch screen, a preparation method and application thereof. Background technique [0002] Carbon fiber is a special fiber with a carbon content of more than 95%, which has high strength and high modulus. At present, carbon fibers mainly include polypropylene cyanocarbon fiber, viscose-based carbon fiber, pitch-based carbon fiber, and vapor-phase grown carbon fiber. [0003] Among them, viscose-based carbon fiber refers to the carbon fiber prepared by pre-oxidation and carbonization of viscose fiber. Viscose-based carbon fiber has the characteristics of high purity, light weight, heat insulation and outstanding corrosion resistance. It is mainly used in thermal insulation materials and In ablative resistant materials. [0004] For the related technology, the inventor thinks that because the grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16D06M11/48D06M13/232D06M101/06
CPCD01F9/16D06M11/48D06M13/232D06M2101/06
Inventor 奚邦籽李金水朱世敏
Owner SHENZHEN HUADINGXING TECH