Adsorption limitation investigation on olefins for Cu-BTC

• Published in: Friction Vol. 12; no. 4; pp. 606 - 617
• Main Authors: Yang, Xiao, Wang, Yunbo, Cao, Weihua, Jiang, Ruizheng, Xie, Guoxin, Cao, Yuying, Qi, Xiaowen
• Format: Journal Article
• Language: English
• Published: Beijing Tsinghua University Press 01.04.2024; Springer Nature B.V; SpringerOpen
• Subjects: 1-olefins; Adsorption; adsorption properties; Alkenes; Benzene; Composite materials; Copper; Corrosion and Coatings; Cu-benzene-1,3,5-tricarboxylate (Cu-BTC); Distribution functions; Engineering; Friction; Hydrocarbons; Infrared spectra; Lubricants; Lubricants & lubrication; Mechanical Engineering; metal-organic framework (MOF); Metal-organic frameworks; Monte Carlo method; Monte Carlo simulation; Nanoparticles; Nanotechnology; Physical Chemistry; Porous materials; Process controls; Radial distribution; Research Article; Self lubrication; Simulation; Solid lubricants; Surfaces and Interfaces; Thin Films; Tribology; adsorption properties; 1-olefins; metal-organic framework (MOF); Monte Carlo method; Cu-benzene-1,3,5-tricarboxylate (Cu-BTC)
• ISSN: 2223-7690; 2223-7704
• DOI: 10.1007/s40544-023-0763-5

To utilize Cu-benzene-1,3,5-tricarboxylate (Cu-BTC) adsorbed lubricant oils in the self-lubricating field, the adsorption properties of Cu-BTC on different 1-olefins must be clarified. In this work, 1-hexene, 1-octene, 1-nonene, 1-decene, 1-undecene, and 1-dodecene were studied by the Monte Carlo method and experimentally. The adsorption limit of Cu-BTC for n-olefins was determined as 1-undecene by the adsorption isotherms. This suggested a limit for even straight-chain molecules to the adsorption of Cu-BTC. The maximum ratio of the olefin length of the largest pore diameter ( L / D ) of Cu-BTC was approximately 1.57. Furthermore, theoretical calculations (radial distribution function (RDF)) and experiments (infrared (IR) spectra) confirmed the interaction of n-olefin adsorbates and the Cu-BTC framework occurred between the -CH= of olefins and the Cu and O atoms of the Cu-BTC framework. This work adds to the understanding and investigation of the adsorption of liquid lubricants using Cu-BTC as a metal-organic framework (MOF).