• Proceedings of the Korean Fiber Society Conference
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• 2003.04a
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• pp.177-178
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• 2003

1934년 Formhals[1,2]에 의해 최초로 특허화된 전기방사(electrospinning)는 최근에 나노기술의 급격한 부각과 함께 과학분야에서 큰 관심의 대상이 되고 있다. 이러한 전기방사는 전형적인 섬유제조방법인 습식ㆍ건식ㆍ용융방사와는 달리 전기적인 힘(electric force)을 이용하여 머리카락 굵기의 100분의 1의 작은 크기의 직경을 갖는 섬유를 제조할 수 있는 방법이다[1,2]. 전기방사에 의해 제조된 웹은 단위 면적당 큰 표면적, 작은 기공, 높은 다공성을 가지고 있기 때문에 필터, 복합체의 강화제, 조직공학에서의 담체(scallold)뿐만 아니라 의료 분야 등에 응용될 수 있다[1,2]. (중략)

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.65-66
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• 2019

In this study, flexural strength and impact resistance were evaluated to investigate the fiber length effect of amorphous metallic fiber. As a result, in the case of 30AFRCC, cutoff behavior due to excellent bonding performance by large specific surface area has greatly influence on the flexural and impact resistance performance. In the case of 15AFRCC, the bonding efficiency is relatively low, because the specific surface area is smaller than that of 30AFRCC and the number of fiber is large, so the effect of improving the flexural and impact resistance performance is smaller than that of 30AFRCC.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.183-184
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• 2023

The purpose of this study is to compare and analyze the effect of type and volume fraction of fiber on the electrical conductivity and shielding effectiveness of cementitious composites. The large specific surface area of amorphous metallic fiber, as well as the high number of fibers per unit weight, provided an advantage in the formation of conductive path. As the result, the electrical conductivity of amorphous metallic fiber was evaluated to be higher, and the shielding effectiveness was also higher. However, the shielding effectiveness according to electrical conductivity was confirmed to have a threshold point, and further research is needed to improve it.

• Journal of the Korean Ceramic Society
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• v.38 no.1
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• pp.52-55
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• 2001

Polyacrylonitrile(PAN)-based 탄소섬유와 epoxy resin matrix 내에 장착된 PAN-based 탄소섬유의 전기저항을 탄소섬유와 파괴될 때까지 인장강도를 증가시키며 측정하였다. 탄소섬유가 끊어져 측정 계기가 open-circuit을 나타내기 전까지 탄소섬유의 전기저항 값은 strain이 증가할수록 증가하였으며, epoxy resin은 탄소섬유의 저항값 측정에 거의 영향을 미치지 않았다. 탄소섬유의 저항값 변화는 strain에 대해 정확도 1% 이내로 예측(calibrate)할 수 있었으며 재현성 또한 우수하였다. 따라서 탄소섬유는 재료의 기계적 강도를 증가시키기 위해 사용될 수 있을 뿐만 아니라 구조재료의 파괴를 예측할 수 있는 스마트 센서로서도 사용할 수 있다는 가능성을 확인하였다.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.279-280
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• 2003

아크릴계 섬유를 포함하여 기존 섬유의 새로운 용도 창출 및 부가가치를 높이기 위하여 특수한 기능성을 나타내는 섬유들에 대한 관심이 꾸준히 증가하고 있다[1]. 이러한 이유로 유기물질과 무기물질의 복합체 제조는 일찍이 1980년대 초부터 연구되고 있고, 새로운 성능 및 기능 화대를 목표로 계속 이루어지고 있다[2]. 폴리아크릴로니트릴(Polyacrylonitrile, PAN)은 용액방사를 하는 대표적인 합성섬유로 담요, 카페트, 커튼 등 다양한 제품으로 응용되고 있으며, 그 성질이 천연섬유인 양모와 유사하기 때문에 양모 대체용으로 많이 사용되고 있다[1]. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 1989.06a
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• pp.41.2-41
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• 1989

• Magazine of the Korea Concrete Institute
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• v.25 no.5
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• pp.25-28
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• 2013

• Proceedings of the Korean Fiber Society Conference
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• 2001.04a
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• pp.209-212
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• 2001

• Proceedings of the Korean Fiber Society Conference
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• 1997.10a
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• pp.207-210
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• 1997

• Journal of the Korea Institute of Building Construction
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• v.19 no.3
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• pp.201-207
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• 2019

In this study, the direct tensile properties of amorphous metallic fiber-reinforced cement based composites according to the strain was evaluated. A thin plate-shape amorphous metallic fiber with 15mm and 30mm in length was used. And fiber-reinforced cement based composites were prepared with contents of 1.0, 1.5, 2.0%. The direct tensile test was conducted under the conditions of $10^{-6}/s(static)$ and $10^1/s(dynamic)$ strain rate. As a results, amorphous metallic fiber with a length of 15mm was observed in pull-out behavior from the cement matrix because of the short fiber length and large portion of mixed fiber. On the other hand, amorphous metallic fiber with a length of 30mm were not pulled out from matrix because the bonding force between the fiber and matrix was large due to rough surface and large specific surface area. However, fracture occurred because thin plate shape fibers were vulnerable to shear force. Tensile strength, strain capacity and toughness were improved due to the increase in the fiber length. The dynamic increase factor of L15 was larger that of L30 because the bonding performance of the fiber-matrix interface is significantly affected by the strain rate.