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Research Article | Open Access

Adsorption limitation investigation on olefins for Cu–BTC

Xiao YANG1,2( ), Yunbo WANG1,2, Weihua CAO1,2, Ruizheng JIANG1,2, Guoxin XIE3( ), Yuying CAO1, Xiaowen QI1,4
School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
Key Laboratory of Self-Lubricating Spherical Plain Bearing Technology of Hebei Province, Yanshan University, Qinhuangdao 066004, China
State Key Laboratory of Tribology in Advanced Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Aviation Key Laboratory of Science and Technology on Generic Technology of Self-Lubricating Spherical Plain Bearing, Yanshan University, Qinhuangdao 066004, China
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Abstract

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).

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Keywords

metal–organic framework (MOF)Cu–benzene-1,3,5-tricarboxylate (Cu–BTC)Monte Carlo methodadsorption properties1-olefins

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Friction
Volume 12 Issue 4,
April 2024
Pages 606-617
DOI: 10.1007/s40544-023-0763-5

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Cite this article:
YANG X, WANG Y, CAO W, et al. Adsorption limitation investigation on olefins for Cu–BTC. Friction, 2024, 12(4): 606-617. https://doi.org/10.1007/s40544-023-0763-5

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Received: 26 August 2022
Revised: 16 November 2022
Accepted: 21 March 2023
Published: 24 August 2023
© The author(s) 2023.

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