TY - JOUR
T1 - Fabrication of ionic liquid-functionalized covalent organic frameworks for friction and wear reduction
AU - Yan, Yaojie
AU - Zhang, Xiaozhi
AU - Cui, Yuhong
AU - Xue, Shenghua
AU - Liu, Shujuan
AU - Ye, Qian
AU - Zhou, Feng
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/7/15
Y1 - 2023/7/15
N2 - Herein, the ionic liquid functionalized covalent organic frameworks (COFs) nanosheets were successfully prepared via solvothermal reaction and then surface modification. Firstly, the COF with –OH groups (COF-OH) can bond with isocyanate (TDI) via the reactions between –OH group of COF-OH and para-NCO group of TDI, then the NH2-ionic liquid ([NH2C2MIm][Br]) can graft onto COF-OH surface (Br-IL@COF-OH) via nucleophilic addition reactions between –NH2 and ortho-NCO group. The as-prepared Br-IL@COF-OH exhibited outstanding lubrication performance as oil-based lubrication additives, with a trace amount addition of 2.0 wt%, the friction coefficient decreases from 0.144 to 0.102, and the wear volume decreases from 1.38 × 104 μm3 to 2.58 × 103 μm3, nearly 81.4%. The remarkable tribological properties are derived from the formation of stable protective film, which is composed of a physical adsorption layer via grafting ionic liquid and the friction film via tribochemical reaction.
AB - Herein, the ionic liquid functionalized covalent organic frameworks (COFs) nanosheets were successfully prepared via solvothermal reaction and then surface modification. Firstly, the COF with –OH groups (COF-OH) can bond with isocyanate (TDI) via the reactions between –OH group of COF-OH and para-NCO group of TDI, then the NH2-ionic liquid ([NH2C2MIm][Br]) can graft onto COF-OH surface (Br-IL@COF-OH) via nucleophilic addition reactions between –NH2 and ortho-NCO group. The as-prepared Br-IL@COF-OH exhibited outstanding lubrication performance as oil-based lubrication additives, with a trace amount addition of 2.0 wt%, the friction coefficient decreases from 0.144 to 0.102, and the wear volume decreases from 1.38 × 104 μm3 to 2.58 × 103 μm3, nearly 81.4%. The remarkable tribological properties are derived from the formation of stable protective film, which is composed of a physical adsorption layer via grafting ionic liquid and the friction film via tribochemical reaction.
KW - Covalent organic frameworks
KW - Ionic liquids functionalized
KW - Lubricant additives
KW - Tribological properties
UR - http://www.scopus.com/inward/record.url?scp=85158862903&partnerID=8YFLogxK
U2 - 10.1016/j.molliq.2023.122026
DO - 10.1016/j.molliq.2023.122026
M3 - 文章
AN - SCOPUS:85158862903
SN - 0167-7322
VL - 382
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 122026
ER -