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- 주제어 : ammonium dithiocarbamate(암모니움 디티오카바메이트) (검색결과 1 건)
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암모니움 디티오카바메이트계 이온성 액체의 합성 및 내마모성능 (Ⅰ)
백승엽(Seung-Yeob Baek),김남균(Nam-Kyun Kim),신지훈(Jihoon Shin),정근우(Keunwo Chung),김영운(Young-Wun Kim) 한국트라이볼로지학회 2014 한국윤활학회지(윤활학회지) Vol.30 No.6
The friction-reducing properties of lubricants containing ionic liquids based on ammonium dithiocarbamate are studied. The ionic liquids are produced through the following two steps: the synthesis of sodium alkyl dithiocarbamates via the substitution reaction of dialkylamine and carbon disulfide and their subsequent conversion into ammonium dithiocarbamate-based ionic liquids through an ion-exchange reaction with a quaternary alkyl ammonium halide salt. The structures of the ionic liquids are characterized by NMR spectroscopy and Fourier transform infrared spectroscopy. The isolated yields of the ionic liquids, which are viscous and pale yellow, are approximately 92%. The Brookfield viscosities and pour points of the ionic liquids are determined. Further, their wear resistances are measured through the four-ball wear test and the Schwingung Reibung Verschleiss (oscillation, friction, wear) test. The wear scar diameter of the lubricants containing 1 wt of the quaternary alkyl ammonium dithiocarbamate-based ionic liquids (0.475-0.631 mm) is significantly lower than that of the base oil (0.825 mm), proving that the ammonium dithiocarbamate-based ionic liquids have good frictionreducing characteristics. However, these friction-reducing characteristics fade significantly after long-term storage, owing to the degradation of the ionic liquids.
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