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전기방사에 의해 제조한 PAN 나노섬유 공기필터 성능평가
김경철(Kyungcheol Kim),김태은(Taeeun Kim),이정구(JungKoo Lee),안지웅(Jiwoong Ahn),박성호(Sungho Park),김형만(Hyungman Kim) 대한기계학회 2015 大韓機械學會論文集B Vol.39 No.11
나노물질은 작은 크기와 공기필터 응용장치의 초고표면적과 함께 기계적, 물리적, 화학적 특성을 가진다. 전기방사는 나노섬유 중합체를 제조하는데 있어 가장 효율적인 기술로 인식되어왔다. 최적의 제조 조건을 찾기 위해, 여러 전기방사 공정 파라미터의 효과에 따른 폴리아크릴로니트릴(PAN) 나노섬유의 직경, 성향 및 분포를 분석했다. 층간파괴 인성 향상시키고 히트롤러로 적층된 부직포의 형태로 박리를 억제하고, PAN 나노섬유 공기필터의 여과효율과 압력강하 성능을 실험적으로 평가하였다. Nanomaterials possess unique mechanical, physical, and chemical properties. They are small, and have an ultrahigh surface area, making them suitable for air filter applications. Electrospinning has been recognized as an efficient technique for fabricating polymer nanofibers. In order to determine the optimum manufacturing conditions, the effects of several electrospinning process parameters on the diameter, orientation, and distribution of polyacrylonitrile (PAN) nanofiber are analyzed. To improve interlaminar fracture toughness and suppress delamination in the form of laminated non-woven fibers by using a heat roller, the performances of filter efficiency and pressure drop achieved with PAN nanofiber air filter are evaluated experimentally.
임경택(Kyungtaek Lim),안택영(Taekyoung Ahn),윤종영(Jongyoung Yoon),김경철(KyungCheol Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
National Highway Traffic Safety Administration (NHTSA) has released revised New Car Assessment Program (NCAP) in July 2008. New frontal NCAP includes the enhanced contents that are extended body injury areas, down injury scale levels and change of the passenger dummy to 5%ile female. Injury probability of new frontal NCAP was increased compared to current one for the same vehicles according to NHTSA research tests. On this study, we analyzed the injury mechanism of each body region (head, neck, chest and femur) and found the countermeasures of restraint systems. The characteristics of airbag, seatbelt and knee bolster are presented to help their design for new frontal NCAP.