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Nickel-plated carbon fiber shielding paper and preparation method thereof

A technology of nickel-plated carbon fiber and bleached wood pulp, which is applied in the fields of shielding technology, papermaking and composite materials, can solve the problems of not involving waterproof and fireproof, limited application scope, decreased mechanical properties, etc., and achieves good electromagnetic shielding effect and comprehensive performance. , high-strength effect

Inactive Publication Date: 2013-05-22
SHENZHEN FRD SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have found that the conductive shielding paper made of carbon fiber and plant fiber has a certain shielding performance, and the shielding effectiveness at 100KHz~1500MHz is greater than 30dB, up to 50dB, which can be suitable for general commercial or electronic products against radiation and electrostatic interference. However, the conductivity of ordinary carbon fiber paper is not high, and its shielding effectiveness cannot meet the occasions with stricter shielding requirements
Moreover, the strength of ordinary carbon fiber paper is greatly affected by the addition of carbon fiber, resulting in a significant decrease in its mechanical properties. In addition, ordinary carbon fiber paper does not involve waterproof and fire prevention considerations, and is not suitable for application requirements in some special occasions, which limits its application range.

Method used

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  • Nickel-plated carbon fiber shielding paper and preparation method thereof

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Embodiment 1

[0027] A preparation method of nickel-plated carbon fiber shielding paper, comprising the following steps:

[0028] A. Preparation of nickel-plated carbon fibers. The nickel-plated carbon fiber is formed by electroplating nickel on the surface of the carbon fiber. The process flow of electroplating nickel is carbon fiber→surface degumming→water washing→electroplating→water washing→drying. Burn for 5 minutes to remove the organic binder on the carbon fiber surface. The current density for electroplating is 100 mA / dm 2 , electroplating time is 6 min, pH value is 4, nickel sulfate 270g / L, boric acid 40g / L, nickel chloride 70g / L are used. At the same time, 0.1g / L sodium dodecylsulfonate should be added, the pH value is 3-4, the temperature is 25°C, and the thickness of the nickel coating is 0.4μm.

[0029] B. Prepare bleached wood pulp. The beating degree of bleached wood pulp is 38°SR, the length of the nickel-plated carbon fiber after chopping is 2-6mm, and the dispersant is ...

Embodiment 2

[0033] A preparation method of nickel-plated carbon fiber shielding paper, comprising the following steps:

[0034] A. Preparation of nickel-plated carbon fibers. The nickel-plated carbon fiber is formed by electroplating nickel on the surface of the carbon fiber. The process flow of electroplating nickel is carbon fiber→surface degumming→water washing→electroplating→water washing→drying. Burn for 5 minutes to remove the organic binder on the carbon fiber surface. The current density for electroplating is 100 mA / dm 2 , the plating time is 8 min, the pH value is 4, nickel sulfate is 280g / L, boric acid is 45g / L, and nickel chloride is 70g / L. At the same time, 0.1 g / L of sodium dodecylsulfonate was added, the pH value was 4, the temperature was 25° C., and the thickness of the nickel coating was 0.5 μm.

[0035] B. Prepare bleached wood pulp, the beating degree of bleached wood pulp is 38°SR, the length of the nickel-plated carbon fiber after chopping is 2 ~ 6mm, the dispersan...

Embodiment 3

[0039] A preparation method of nickel-plated carbon fiber shielding paper, comprising the following steps:

[0040] A. Preparation of nickel-plated carbon fibers. The nickel-plated carbon fiber is formed by electroplating nickel on the surface of the carbon fiber. The process flow of electroplating nickel is carbon fiber→surface degumming→water washing→electroplating→water washing→drying. Burn for 5 minutes to remove the organic binder on the carbon fiber surface. The current density for electroplating is 100 mA / dm 2, plating time 8 min, pH value 4, use nickel sulfate 270g / L, boric acid 40g / L, nickel chloride 70g / L, add sodium dodecylsulfonate 0.1g / L at the same time, pH value 4, temperature 25 ℃, nickel coating thickness is 0.5μm

[0041] B. Prepare bleached wood pulp. The beating degree of bleached wood pulp is 35°SR. The length of the nickel-plated carbon fiber after chopping is 2-6 mm. The dispersant is APAM, which is added in an amount of 1% volume fraction. The nicke...

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Abstract

The invention discloses nickel-plated carbon fiber shielding paper and a preparation method thereof. The preparation method comprises the following process steps: firstly, preparing nickel-plated carbon fibers, preparing a bleached wood pulp, and after the nickel-plated carbon fibers are chopped, adding the chopped nickel-plated carbon fibers into the bleached wood pulp to mix according to a volume fraction of 5-30%; and then, adding a dispersant into the obtained mixture to carry out aqueous phase dispersion, carrying out papermaking on the dispersed mixed pulp, and squeezing and drying the obtained product so as to obtain nickel-plated carbon fiber shielding paper. Through preparing shielding paper by using nickel-plated carbon fibers, the electrical conductivity of the shielding paper is better than that of a common carbon fiber shielding paper, the electromagnetic shielding effect is better, and the shielding effectiveness of the shielding paper in a high-frequency area is similar to that of a conductive fabric, therefore, the shielding paper is suitable for being applied to occasions with stricter requirements on shielding effectiveness. Meanwhile, the strength of the nickel-plated carbon fiber shielding paper disclosed by the invention is higher than that of a common carbon fiber paper, and the comprehensive performance of the shielding paper is more excellent, therefore, the shielding paper accords with the requirements of high-performance materials.

Description

technical field [0001] The invention relates to the interdisciplinary fields of papermaking, shielding technology and composite materials, in particular to a nickel-plated carbon fiber shielding paper and a preparation method thereof. Background technique [0002] Ordinary carbon fiber has properties similar to metal and is a good conductor. Studies have found that the conductive shielding paper made of carbon fiber and plant fiber has a certain shielding performance, and the shielding effectiveness at 100KHz~1500MHz is greater than 30dB, up to 50dB, which can be suitable for general commercial or electronic products against radiation and electrostatic interference. However, the conductivity of ordinary carbon fiber paper is not high, and its shielding effectiveness cannot meet the occasions with stricter shielding requirements. Moreover, the paper strength of ordinary carbon fiber paper is greatly affected by the addition of carbon fiber, resulting in a significant decreas...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21F3/02
Inventor 王美发张欢
Owner SHENZHEN FRD SCI & TECH
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