TY - JOUR
T1 - Poly(alkylimidazolium bis(trifluoromethylsulfonyl)imide)-Based Polymerized Ionic Liquids
T2 - A Potential High-Performance Lubricating Grease
AU - Wu, Jian
AU - Mu, Liwen
AU - Feng, Xin
AU - Lu, Xiaohua
AU - Larsson, Roland
AU - Shi, Yijun
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/3/8
Y1 - 2019/3/8
N2 - Polymers prepared from ionic liquids are widely called polymerized ionic liquids (PILs). Compared to monocationic and dicationic ILs, PILs have higher molecular weights, charge, and greater intermolecular interactions, which make PILs have a higher possibility to generate better lubricity. PILs of poly-alkylimidazolium bis(trifluoromethylsulfonyl)imide (PImC 6 NTf 2 ) is studied herein. Dicationic ILs of 1,1′-(pentane-1,5-diyl)-bis(3-butylimidazolium) bis(trifluoromethylsulfonyl)imide (BIm 5 -(NTf 2 ) 2 ) is used as additive to decrease the crystallization temperature of PImC 6 NTf 2 . Lubricity of PImC 6 NTf 2 and PImC 6 NTf 2 +BIm 5 -(NTf 2 ) 2 , as well as BIm 5 -(NTf 2 ) 2 for comparison is evaluated under severe conditions, i.e., 3.0 to 3.5 GPa and 200 °C. The rheological study suggests that PImC 6 NTf 2 can be classified into grease. Tribological test results show that PImC 6 NTf 2 has much better antiwear property than BIm 5 -(NTf 2 ) 2 , especially at 3.5 GPa. Adding 4% BIm 5 -(NTf 2 ) 2 to PImC 6 NTf 2 is able to reduce friction under high pressure. At 200 °C, PImC 6 NTf 2 exhibits excellent lubricity. The mixture of 96%PImC 6 NTf 2 +4%BIm 5 -(NTf 2 ) 2 shows even better antiwear property than neat PImC 6 NTf 2 and exhibits the highest friction reducing property among the ILs at 200 °C. It is speculated that the robust strength of PILs and strong adhesion between PILs and solids are key factors in achieving the excellent antiwear property.
AB - Polymers prepared from ionic liquids are widely called polymerized ionic liquids (PILs). Compared to monocationic and dicationic ILs, PILs have higher molecular weights, charge, and greater intermolecular interactions, which make PILs have a higher possibility to generate better lubricity. PILs of poly-alkylimidazolium bis(trifluoromethylsulfonyl)imide (PImC 6 NTf 2 ) is studied herein. Dicationic ILs of 1,1′-(pentane-1,5-diyl)-bis(3-butylimidazolium) bis(trifluoromethylsulfonyl)imide (BIm 5 -(NTf 2 ) 2 ) is used as additive to decrease the crystallization temperature of PImC 6 NTf 2 . Lubricity of PImC 6 NTf 2 and PImC 6 NTf 2 +BIm 5 -(NTf 2 ) 2 , as well as BIm 5 -(NTf 2 ) 2 for comparison is evaluated under severe conditions, i.e., 3.0 to 3.5 GPa and 200 °C. The rheological study suggests that PImC 6 NTf 2 can be classified into grease. Tribological test results show that PImC 6 NTf 2 has much better antiwear property than BIm 5 -(NTf 2 ) 2 , especially at 3.5 GPa. Adding 4% BIm 5 -(NTf 2 ) 2 to PImC 6 NTf 2 is able to reduce friction under high pressure. At 200 °C, PImC 6 NTf 2 exhibits excellent lubricity. The mixture of 96%PImC 6 NTf 2 +4%BIm 5 -(NTf 2 ) 2 shows even better antiwear property than neat PImC 6 NTf 2 and exhibits the highest friction reducing property among the ILs at 200 °C. It is speculated that the robust strength of PILs and strong adhesion between PILs and solids are key factors in achieving the excellent antiwear property.
KW - grease
KW - high pressure and high temperature
KW - lubricity
KW - polymerized ionic liquids
UR - http://www.scopus.com/inward/record.url?scp=85060163753&partnerID=8YFLogxK
U2 - 10.1002/admi.201801796
DO - 10.1002/admi.201801796
M3 - 文章
AN - SCOPUS:85060163753
SN - 2196-7350
VL - 6
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 5
M1 - 1801796
ER -