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IONIC LIQUIDS CONTAINING QUATERNARY AMMONIUM AND PHOSPHONIUM CATIONS, AND THEIR USE AS ENVIRONMENTALLY FRIENDLY LUBRICANT ADDITIVES
IONIC LIQUIDS CONTAINING QUATERNARY AMMONIUM AND PHOSPHONIUM CATIONS, AND THEIR USE AS ENVIRONMENTALLY FRIENDLY LUBRICANT ADDITIVES
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机译:含有季铵和鏻阳离子的离子液体,其用作环保润滑剂添加剂
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摘要
An ionic liquid composition having the following generic structural formula:; ;wherein Z is N or P, and R1, R2, R3, and R4 are independently selected from hydrogen atom and hydrocarbon groups having one to four carbon atoms with optional interconnection to form a cyclic group that includes Z, and wherein R1, R2, R3, and R4 are all hydrocarbon groups when Z is P, and X− is a phosphorus-containing or carboxylate anion, particularly an organophosphate, organophosphonate, or organophosphinate anion, or a thio-substituted analog thereof containing hydrocarbon groups with at least three carbon atoms. Also described are lubricant compositions comprising the above ionic liquid and a base lubricant, wherein the ionic liquid is dissolved in the base lubricant. Further described are methods for applying the ionic liquid or lubricant composition onto a mechanical device for which lubrication is beneficial, with resulting improvement in friction reduction, wear rate, and/or corrosion inhibition.
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