Fatty Acid-Derived Ionic Liquid Lubricant. Protic Ionic Liquid Crystals as Protic Ionic Liquid Additives

被引:16
作者
Aviles, Maria-Dolores [1 ]
Pamies, Ramon [1 ]
Sanes, Jose [1 ]
Carrion, Francisco-Jose [1 ]
Bermudez, Maria-Dolores [1 ]
机构
[1] Univ Politecn Cartagena, Grp Ciencia Mat & Ingn Met, Campus Muralla del Mar, Cartagena 30202, Spain
关键词
protic ionic liquid crystals; citrate; palmitate; bis(2-hydroxyethyl)ammonium; friction; wear; lubrication; LOW-FRICTION; LUBRICITY; WEAR;
D O I
10.3390/coatings9110710
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Fatty acids are natural products which have been studied as green lubricants. Ionic liquids are considered efficient friction reducing and wear preventing lubricants and lubricant additives. Fatty acid-derived ionic liquids have shown potential as neat lubricant and additives. Protic ionic liquid crystals (PILCs) are protic ionic liquids (PILs) where cations and anions form ordered mesophases that show liquid crystalline behavior. The adsorption of carboxylate units on sliding surfaces can enhance the lubricant performance. Ionic liquid crystal lubricants with longer alkyl chains can separate sliding surfaces more efficiently. However, they are usually solid at room temperature and, when used as additives in water, transitions to high friction coefficients and wear rates, with tribocorrosion processes occur when water evaporation takes place at the interface. In order to avoid these inconveniences, in the present work, a protic ammonium palmitate (DPA) ionic liquid crystal has been added in 1 wt.% proportion to a short chain citrate ionic liquid (DCi) with the same protic ammonium cation. A spin coated layer of (DCi + DPA) was deposited on AISI316L steel surface before the sliding test against sapphire ball. Synergy between DCi PIL and DPA PILC additive reduces friction coefficient and wear rate, without tribocorrosion processes, as shown by scanning electron microscopy (SEM)/energy dispersive X-ray microanalysis (EDX) and X-ray photoelectron spectroscopy (XPS) results.
引用
收藏
页数:10
相关论文
共 33 条
[1]   Synthesis and thermophysical properties of two new protic long-chain ionic liquids with the oleate anion [J].
Alvarez, Victor H. ;
Mattedi, Silvana ;
Martin-Pastor, Manuel ;
Aznar, Martin ;
Iglesias, Miguel .
FLUID PHASE EQUILIBRIA, 2010, 299 (01) :42-50
[2]   Sustainable Cotton Dyeing in Nonaqueous Medium Applying Protic Ionic Liquids [J].
Andrade, Rebecca S. ;
Torres, Dayse ;
Ribeiro, Fabia R. ;
Chiari-Andreo, Bruna G. ;
Oshiro Junior, Joao Augusto ;
Iglesias, Miguel .
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2017, 5 (10) :8756-8765
[3]   Ionic Liquid Crystals in Tribology [J].
Aviles, M. D. ;
Sanchez, C. ;
Pamies, R. ;
Sanes, J. ;
Bermudez, M. D. .
LUBRICANTS, 2019, 7 (09)
[4]   Effects of protic ionic liquid crystal additives on the water-lubricated sliding wear and friction of sapphire against stainless steel [J].
Aviles, M. D. ;
Carrion, F. J. ;
Sanes, J. ;
Bermudez, M. D. .
WEAR, 2018, 408 :56-64
[5]   Self-lubricating, wear resistant protic ionic liquid-epoxy resin [J].
Aviles, M. D. ;
Saurin, N. ;
Espinosa, T. ;
Sanes, J. ;
Arias-Pardilla, J. ;
Carrion, F. J. ;
Bermudez, M. D. .
EXPRESS POLYMER LETTERS, 2017, 11 (03) :219-229
[6]   Novel fatty acid anion-based ionic liquids: Contact angle, surface tension, polarity fraction and spreading parameter [J].
Blanco, D. ;
Rivera, N. ;
Oulego, P. ;
Diaz, M. ;
Gonzalez, R. ;
Battez, A. Hernandez .
JOURNAL OF MOLECULAR LIQUIDS, 2019, 288
[7]   Diprotic ammonium palmitate ionic liquid crystal and nanodiamonds in aqueous lubrication. Film thickness and influence of sliding speed [J].
Carrion, F. J. ;
Aviles, M. D. ;
Nakano, K. ;
Tadokoro, C. ;
Nagamine, T. ;
Bermudez, M. D. .
WEAR, 2019, 418 :241-252
[8]   Biobased Green Lubricants: Physicochemical, Tribological and Toxicological Properties of Fatty Acid Ionic Liquids [J].
Fan, Mingjin ;
Ma, Lin ;
Zhang, Chaoyang ;
Wang, Zijing ;
Ruan, Jiacheng ;
Han, Mei ;
Ren, Yuyu ;
Zhang, Chi ;
Yang, Desuo ;
Zhou, Feng ;
Liu, Weimin .
TRIBOLOGY TRANSACTIONS, 2018, 61 (02) :195-206
[9]   Fatty acid ionic liquids as environmentally friendly lubricants for low friction and wear [J].
Gusain, Rashi ;
Khatri, Om P. .
RSC ADVANCES, 2016, 6 (05) :3462-3469
[10]   Physicochemical, traction and tribofilm formation properties of three octanoate-, laurate- and palmitate-anion based ionic liquids [J].
Hernandez Battez, A. ;
Rivera, N. ;
Blanco, D. ;
Oulego, P. ;
Viesca, J. L. ;
Gonzalez, R. .
JOURNAL OF MOLECULAR LIQUIDS, 2019, 284 :639-646