• Journal of the Korean Recycled Construction Resources Institute
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• v.8 no.4
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• pp.429-435
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• 2020

In this study, physical properties and EMP shielding performance evaluation of cement paste according to the amount of milled carbon fiber was conducted to develop EMP shielding cement using carbon fiber. The length of the milled carbon fiber used was 100㎛, and it was used as a cement admixture because it showed a powdery form to the naked eye. As a result of the experiment, when 5% of the amount of cement was used, the milled carbon fiber was effective in compressive strength and EMP shielding, and the shielding effect did not increase when used beyond that. As a result of examining the EMP shielding performance according to the thickness of the specimen, the plain without milled carbon fiber had no effect of increasing the shielding rate according to the thickness. The shielding performance of the specimens using the milled carbon fiber increased as the thickness increased. Therefore, in order to increase the EMP shielding rate when comparing and evaluating the performance according to the amount of milled carbon fiber used and the thickness of the specimen, 5% of the milled carbon fiber used is optimal. In addition, the method of increasing the thickness is considered to be effective.

• Analytical Science and Technology
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• v.20 no.4
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• pp.296-301
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• 2007

Carbon nanofibers (CNFs) are non-microporous materials with a high surface area ($100{\sim}200m^2/g$) and high purity. Therefore, the material has a high potential for use as catalyst support. Activated carbon fibers (ACFs) are of increasing concern with regard to the levels of toxic air pollutants emitted from high-technology industry. Rayon-based CNFs and ACFs was subjected to thermal oxidation under a wide variety of temperature and air conditions to modify the surface properties. Rayon-based CNFs and ACFs were prepared by using thermal chemistry. CNFs were synthesized at temperatures above $600^{\circ}C$ in an air atmosphere and grew with increased temperature and air conditions. After heating at $800^{\circ}C$ for 72 hr, carbonized rayon with ACFs had $2,662m^2/g$ (BET) of surface area and $1.41cm^3/g$ of pore volume. The resulting ACFs had a 99% surface area in which pore size was 10 nm or less, and a 60 % surface area in which pore size was 2 nm or less.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.201-202
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• 2003

탄소나노튜브는 역학적 물성이 뛰어날 뿐만 아니라 전기적 특성도 우수하여 현재 매우 많은 연구와 응용개발이 시도되고 있다 일반적으로 전기전도성 고분자 복합체를 얻기 위한 방법으로 카본블랙이나 전도성 섬유, 금속섬유, 전도성 분말 등을 고분자에 혼입하는 방법을 주로 이용하지만, 복합체 내에서 나노구조 형성이 가능한 탄소나노튜브를 이용하면 나노물질의 특성상 매우 유리한 점이 많다. 예를 들면, 우수한 전기특성, 낮은 임계농도, 우수한 역학적 성질 둥이다. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 2001.10a
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• pp.320-323
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• 2001

일반적으로 고분자 재료는 그 자체로는 전기가 통하지 않는 전기절연체이나 여기에 카본블랙, 카본파이버, 금속분말 등 전도성을 가지는 입자들을 가지고 도핑할 경우 전기가 통하는 반도체 특성을 지니는 재료로 변화를 한다. 특히, 전기ㆍ전자재료 분야에서 이러한 특성을 이용한 재료 중 하나인 PTC 소자는 나노 크기를 가지는 카본 블랙과 고분자 재료의 복합화를 바탕으로 하여 과전류에 의한 발열의 감지 및 전류를 차단함으로서 회로를 보호하는 소자를 말하는 것으로서 현재 그 수요량이 급격히 증대하고 있는 기능성 재료중 하나이다. (중략)

• Journal of the Korean Recycled Construction Resources Institute
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• v.11 no.1
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• pp.48-54
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• 2023

In this research, The basic physical properties and EMP shielding performance by thickness were evaluated for optimum composition of EMP shield concrete that can be applied on-site by mixing carbon-based materials with high conductivity into concrete that uses electric furnace oxidized slag (EOS). As a result of the evaluation, it was confirmed that the slump decreased as the amount of mixed carbon fib er (CF) increased, and increased when milled carb on (MCF) was mixed. As for the compressive strength, it was confirmed that EOS enhanced the strength compared to NA, and it was confirmed that the strength decreased when CF and MCF were mixed. As the thickness of the EMP shielding measurement increases, the shielding rate increases, and it was confirmed that the type of conductive material and the thickness of the test specimen have a greater influence on the shielding rate than the Amount of conductive material added. As a result of a comparative evaluation, EOS CF 0.2 is considered suitable for EMP shield concrete formulation.

• Proceedings of the Korean Fiber Society Conference
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• 2000.04a
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• pp.137-140
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• 2000

• Elastomers and Composites
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• v.33 no.5
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• pp.355-362
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• 1998

The purpose of this paper is to develop a rational engineering conductive carbon filled composite through understanding of the effect of conductive carbon black. Polycabonate(PC), Acrylonitrile Butadiene Styrene copolymer(ABS) and PC/ABS resin were used as matrix of the conductive polymer composites. From the experimental results, PC filled with the fiber shaped carbon black showed a possibility to be a rational engineering conductive composite.

• Composites Research
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• v.12 no.5
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• pp.80-86
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• 1999

Mechanical characteristics of composite laminates and cylindrical shell using scrim of glass scrim are evaluated in this paper. Composite laminates and cylindrical shells are made by inserting carbon scrim or glass scrim between layers. The mechanical properties are routinely characterized by ASTM stands. Experimental results show that the mechanical properties of UD prepreg in the transverse direction are highly improved by inderting scrims between layers.

• Journal of the Korean Society for Precision Engineering
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• v.24 no.8 s.197
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• pp.21-24
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• 2007

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.747-748
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• 2010