• Title/Summary/Keyword: 전도성섬유

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Studies on PTC Properties of Carbon Black-Filled HDPE Conductive Composites Containing Elastomer (엘라스토머를 함유한 Carbon Black-Filled HDPE 전도성 복합재료의 PTC 특성 연구)

  • 서민강;김학용;이덕래;박수진
    • 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)

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Conductive Carbon Block Filled Composites( II ) - Concentrated on Processabilily - (전도성 카본블랙이 충진된 도전성 고분자 복합재료(II) -가공성을 중심으로 -)

  • Kim, Jin-Kuk
    • Elastomers and Composites
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    • v.34 no.2
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    • pp.113-120
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    • 1999

  • Nobody doubts to say that one of the most important performance polymers is a conductive polymer. The manufacturing process of the commercial conductive polymers has been known by mixing with the conductive materials, but it doesn't noticeably appear of a conductive function. One of the reasons is the lack of comprehension In compounding a carbon black with polymer rosins. This paper involves the understanding of compounding technology of the conductive carbon black filled composite. Our experimental results indicate that the fibrous shaped carbon black was hard to process but appeared of a superior conductivity compared to a stick or a sphelulite shaped carbon black. Therefore, it was processed with a processing oil in compounding, which led to a better processability and a better conductivity. This study was accomplished that the solution process compared to the melting process.

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Analysis of Heat-generating Performance, Flexural Strength and Microstructure of Conductive Mortar Mixed with Micro Steel Fiber and MWCNT (마이크로 강섬유와 MWCNT를 혼입한 전도성 모르타르의 발열성능, 휨강도 및 미세구조 분석 )

  • Beom-gyun Choi;Gwang-hee Heo
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.28 no.3
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    • pp.47-58
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    • 2024

  • This study were conduced experimentally to analyze the heat-generating performance, flexural strength, and microstructure of conductive mortar mixed with micro steel fiber and multi-wall carbon nanotube (MWCNT). In the conductive mortar heat-generating performance and flexural strength tests, the mixing concentration of MWCNT was selected as 0.0wt%, 0.5wt%, and 1.0wt% relative to the weight of cement, and micro steel fibers were mixed at 2.0vol% relative to the volume. The performance experiments were conducted with various applied voltages (DC 10V, 30V, 60V) and different electrode spacings (40 mm, 120 mm) as parameters, and the flexural strength was measured at the curing age of 28 days and compared and analyzed with the normal mortar. Furthermore, the surface shape and microstructure of conductive mortar were analyzed using a field emission scanning electron microscope (FE-SEM). The results showed that the heat-generating performance improved as the mixing concentration of MWCNT and the applied voltage increased, and it further improved as the electrode spacing became narrower. However, even if the mixing concentration of MWCNT was added up to 1.0 wt%, the heat-generating performance was not significantly improved. As a result of the flexural strength test, the average flexural strength of all specimens except the PM specimen and the MWCNT mixed specimens was 4.5 MPa or more, showing high flexural strength due to the incorporation of micro steel fibers. Through FE-SEM image analysis, Through FE-SEM image analysis, it was confirmed that a conductive network was formed between micro steel fibers and MWCNT particles in the cement matrix.

  • https://doi.org/10.11112/jksmi.2024.28.3.47 인용 PDF

Development of Insole Type Capacitive Pressure Sensor for Smart Gait Analysis (스마트 보행분석을 위한 깔창 형태의 전기용량성 압력센서 개발)

  • Woo, Hyunsoo;Min, Se Dong
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2012.07a
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    • pp.411-412
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    • 2012

  • 본 논문에서는 인간의 가장 기본적이며 기초적인 운동인 걸음걸이로부터 검출할 수 있는 걸음 수 및 보행분석을 위해 전도성 섬유를 이용한 전기용량성압력 센서를 깔창형태로 개발하였다. 개발된 깔창 형태의 센서는 보행시의 압력을 측정하여 보행신호를 검출하고, 검출된 신호를 이용하여 걸음 수 및 보행 분석을 실시하였다. 개발된 센서의 성능 검증을 위하여 상용 만보계 및 관찰자의 수계로 도출된 보수를 비교하였으며, 자세에 따른 압력차이를 측정하였다. 기존의 상용 만보계는 저속(1 Km/h)으로 걸었을 때 보수가 잘 측정되지 않은 반면 개발된 센서는 저속에서도 관찰자 수계대비 정확한 보수를 도출 할 수 있었다. 또한 자세에 따라 압력 값을 토대로 사용자의 자세를 모니터링 할 수 있음을 보였다. 본 연구는 향후 스마트폰과 무선 연동하는 스마트 보행관리 시스템을 개발하기 위한 기초연구이다.

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