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- 저자 : 김태영(Kim T.Y) (검색결과 95 건)
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고급 지방산 N-아실 콜라겐 유도체의 합성 및 계면활성
김태영,남기대,남상인,안정호,이진희,Kim, T.Y.,Nam, K.D.,Nam, S.I.,Ahn, J.H.,Lee, J.H. 한국응용과학기술학회 1993 한국응용과학기술학회지 Vol.10 No.2
The Surfactants composed of acylated aterocollagen which is produced by the acylation of the side chain amino radicals of aterocollagen with an aliphatic acid having 12 to 18 carbon atoms will be discussed in this study. This condensation is done at moderate reaction temperature (<$25^{\circ}C$) in aqueous alkaline solution. The products of this reaction were identified by UV/VIS spectroscopy and infrared spectroscopy. For these compounds, surface active properties and physical properties including isoelectric point, Krafft point, surface tension, critical micelle concentration(cmc), foaming power, viscosity behaviour, water holding capacity, skin irritation and emulsifying power were measured respectively. The experimental results received that the products have a good emulsifying power, excellent water holding capacity while having low skin irritation. Thus, these derivatives will be expected to be used as an emulsifying agent for O/W type cosmetic emulsion.
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자동차 부품 정밀가공면의 소성스트레인 측정을 위한 새로운 기법의 개발
김태영(T. Y. Kim),반야풍(Y. Iino),문상돈(S. D. Mun) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
Metal cutting leaves a plastically deformed layer in the precision machined surface in motor parts, such as torsion beam, rear axle and hole of engin piston. This residual phenomenon affects in various forms the physical properties of machined components such as the fatigue strength. the dimensional instability, microcracks and the stress corrosion cracking. There is an alternative way to determine the residual strain in plastically deformed materials by measuring the plastically deformed layer after a subsequent recrystallization process.<br/> The purpose of this investigation is to explore a new technique for measuring plastic strain in machining applications, and in particular, to find the effect of cutting parameters, on the plastic strains in motor parts.<br/>
ScienceON
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