Diprotic ammonium palmitate ionic liquid crystal and nanodiamonds in aqueous lubrication. Film thickness and influence of sliding speed

被引:30
作者
Carrion, F. J. [1 ]
Aviles, M. D. [1 ]
Nakano, K. [2 ]
Tadokoro, C. [3 ]
Nagamine, T. [3 ]
Bermudez, M. D. [1 ]
机构
[1] Univ Politecn Cartagena, Grp Ciencia Mat & Ingn Met, Campus Muralla Mar,C Doctor Fleming S-N, Cartagena 30202, Spain
[2] Yokohama Natl Univ, Fac Environm & Informat Sci, Hodogaya Ku, 79-7 Tokiwadai, Yokohama, Kanagawa 2408501, Japan
[3] Saitama Univ, Dept Mech Engn, Saitama, Japan
关键词
Water; Ionic liquid crystals; Nanodiamonds; Lubrication; Film thickness; Friction; Wear; TRIBOLOGICAL PROPERTIES; HALOGEN-FREE; LOW-FRICTION; WATER; ADDITIVES; LUBRICANTS; BEHAVIOR; ORIENTATION; BOUNDARY; OIL;
D O I
10.1016/j.wear.2018.12.011
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Ionic liquid based lubricants offer potential to reduce the sliding friction and wear of ferrous bearing surfaces such as those used in cutting and machining processes. In this study, two types of promising additives were investigated: (1) diprotic bis(2-hydroxyethyl)ammonium palmitate (DPA) ionic liquid crystal and (2) a 0.1 wt% dispersion of nanodiamonds (ND) in DPA. Both have been used at 1 wt% concentration in aqueous lubricants. Those were Water + DPA, and Water + DPA + ND. The stability of the dispersions has been studied by dynamic light scattering, finding that the interaction between the additives and water changes particle size distribution. Glass-against-steel optical interferometry using water film alone indicated that the film thickness decreased with number of sliding strokes and that in turn increased the friction coefficient. By comparison, Water + DPA and Water + DPA + ND showed lower friction coefficients and increased film thickness. In steel-steel pin-on-disk contacts lubricated only by water, electrical resistance increases at speeds higher than 100 mm/s. DPA and DPA + ND additives displace the electrical resistance increase to lower sliding speed, around 10 mm/s. The additives reduced the coefficients of sliding friction up to 82%, and wear rates of AISI 316L disks by more than two orders of magnitude. The combination of the palmitate ionic liquid crystal and nanodiamonds in Water + DPA + ND gave the lowest wear rates. The wear mechanism and surface analysis associated with these results are discussed.
引用
收藏
页码:241 / 252
页数:12
相关论文
共 53 条
[1]   Bronsted Ionic Liquids for Sustainable Processes: Synthesis and Physical Properties [J].
Alvarez, Victor H. ;
Dosil, Noelia ;
Gonzalez-Cabaleiro, Rebeca ;
Mattedi, Silvana ;
Martin-Pastor, Manuel ;
Iglesias, Miguel ;
Navaza, Jose M. .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2010, 55 (02) :625-632
[2]   Ultralow Friction of Mesogenic Fluid Mixtures in Tribological Reciprocating Systems [J].
Amann, Tobias ;
Kailer, Andreas .
TRIBOLOGY LETTERS, 2010, 37 (02) :343-352
[3]   A review on ionic liquids as sustainable lubricants in manufacturing and engineering: Recent research, performance, and applications [J].
Amiril, S. A. S. ;
Rahim, E. A. ;
Syahrullail, S. .
JOURNAL OF CLEANER PRODUCTION, 2017, 168 :1571-1589
[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]  
Avilés MD, 2017, LUBRICANTS, V5, DOI 10.3390/lubricants5020014
[6]   Ionic Liquids as Advanced Lubricant Fluids [J].
Bermudez, Maria-Dolores ;
Jimenez, Ana-Eva ;
Sanes, Jose ;
Carrion, Francisco-Jose .
MOLECULES, 2009, 14 (08) :2888-2908
[7]   Tribological properties of liquid crystals as lubricant additives [J].
Bermudez, MD ;
Martinez-Nicolas, G ;
Carrion-Vilches, FJ .
WEAR, 1997, 212 (02) :188-194
[8]   Ionic liquid crystals [J].
Binnemans, K .
CHEMICAL REVIEWS, 2005, 105 (11) :4148-4204
[9]   Elastohydrodynamic Performance of a Bio-Based, Non-Corrosive Ionic Liquid [J].
Bjorling, Marcus ;
Bair, Scott ;
Mu, Liwen ;
Zhu, Jiahua ;
Shi, Yijun .
APPLIED SCIENCES-BASEL, 2017, 7 (10)
[10]   Liquid Crystals in Tribology [J].
Carrion, Francisco-Jose ;
Martinez-Nicolas, Gines ;
Iglesias, Patricia ;
Sanes, Jose ;
Bermudez, Maria-Dolores .
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2009, 10 (09) :4102-4115