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CNT 직경에 따른 CNT-Polyamide 복합체의 특성 변화
박영수(Y.S. Park),송준혁(S.J. Song),김경재(K.J. Kim),허몽영(H.M. Huh),유명한(M.H. Yoo),문민석(M.S. Moon),오제하(J.H. Oh),정우성(W.S. Jeong),강신재(S.J. Kang),양성모(S.M. Yang) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
The effect of CNT diameters on properties of CNT-polyamide composites were investigated such as electrical conductivity, tensile strength and thermal conductivity. To get different diameter distributions of CNTs, several portions of Mo and Fe in Mo-Fe/MgO catalysts were synthesized by a combustion method at 600℃. And all CNTs growed at 900℃ with 3 SLM methane and 1 SLM hydrogen for 40min. Four kinds of CNTs with different diameter distributions, such as 1~3㎚, 3~7㎚, 7~13㎚, and 10~30㎚, were selected to make CNT-polyamide composites. Each composite was manufactured by a solution mixing using bar-type ultra-sonicator in the CNT portions from 1phr to 50 phr. And electrical conductivity, tensile strength, and thermal conductivity were measured. Three properties of CNT-polyamide composite, manufactured with 10㎚ diameter, were more excellent compared to other composites, with electrical conductivity 10°Ω at 7phr, thermal conductivity 2.4.W/mK at 40phr, tensile strength 60㎫ at 30phr. CNTs with diameter 10㎚ were superior to other diameters for the multi-functional composite such as CNT-polyamide Composites.
송준혁(S.J. Song),김하수(H.S. Kim),강희용(H.Y. Kang),양성모(S.M. Yang),홍동표(D.P. Hong),정태진(T.L. Chung),최병기(B.K. Choi) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
This study has two main pants, comqaring the characteristics between the conventional clutch system and DMF system, and the DMF system in vehicle and computer simulation of DMF. The characteristics of torsional vibrations between a conventiona1 clutch system after optimal clutch system tunning and DMF system at engine phase of stat up, idle, creeping drive and coast. To develope a new optimum system, a dynamic model of powertrain at idle phase is developed compared with actual vehicle at start up ant idle phase of engine. This model is well suited for actual system. First of all, a DMF system is superior to a conventional clutch system.