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Title: Preparation of Mg/Al-LDHs intercalated with dodecanoic acid and investigation of its antiwear ability

Abstract

Graphical abstract: Comparable studies of nano Mg/Al-LDHs powder on the anti-wear properties of lubricating oil were carried out on four-ball and gear testing machine. Mg/Al-NO{sub 3}{sup −}-LDHs and Mg/Al-DA-LDHs powder in base oil possess an excellent friction-reducing property, with a friction coefficient at 23.9% and 22.2% which are lower than that of the base oil Highlights: ► We synthesized nano Mg/Al-NO{sub 3}{sup −}(DA)-LDHs via coprecipitation and anion exchange. ► The optimal exchanging condition is as follows: water dispersion and pH value of 5. ► The tribological properties of LDHs were studied on four-ball and gear machine. ► We reported nano LHDs as anti-wear materials in lubricates for the first time. ► The greatest decline in friction coefficient of lubricates with LDHs is up to 23.9%. -- Abstract: Layered double hydroxides (LDHs) intercalated with dodecanoic acid have been prepared by anion exchange with Mg/Al-NO{sub 3}{sup −}-LDHs as the precursor under acid condition with water and ethanol as the dispersion medium. The obtained materials were characterized by X-ray diffraction (XRD), thermogravimetric and differential thermal analyser (TG–DTA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and BET. Patterns of XRD and FTIR show that interlayer nitrate ions have substituted with dodecanoic acidmore » and the gallery height has increased from 0.88 nm to 1.99 nm. The interlayer distance of the intercalated materials increases with the increase of pH value due to the different arrangement of interlayer anions. The tribological performance of LDHs precursor and intercalated LDHs in base oil were studied for the first time by using four-ball wear machine and gear testing machine. Experimental results show that the LDHs precursor and intercalated LDHs powder are excellent in friction-reducing, with decreases in friction coefficient by 23.9% and 22.2% respectively comparing with base oil.« less

Authors:
 [1]; ;  [1]
  1. School of Materials Science and Technology, China University of Geosciences, Beijing 100083 (China)
Publication Date:
OSTI Identifier:
22215608
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; CLATHRATES; DODECANOIC ACID; FOURIER TRANSFORM SPECTROMETERS; FOURIER TRANSFORMATION; FRICTION FACTOR; INFRARED SPECTRA; ION EXCHANGE; LHD DEVICE; LUBRICATING OILS; MECHANICAL PROPERTIES; SCANNING ELECTRON MICROSCOPY; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION

Citation Formats

Zhao, Dong, E-mail: zhaodongpinbo@163.com, Bai, Zhimin, and Zhao, Fuyan. Preparation of Mg/Al-LDHs intercalated with dodecanoic acid and investigation of its antiwear ability. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.06.042.
Zhao, Dong, E-mail: zhaodongpinbo@163.com, Bai, Zhimin, & Zhao, Fuyan. Preparation of Mg/Al-LDHs intercalated with dodecanoic acid and investigation of its antiwear ability. United States. doi:10.1016/J.MATERRESBULL.2012.06.042.
Zhao, Dong, E-mail: zhaodongpinbo@163.com, Bai, Zhimin, and Zhao, Fuyan. Thu . "Preparation of Mg/Al-LDHs intercalated with dodecanoic acid and investigation of its antiwear ability". United States. doi:10.1016/J.MATERRESBULL.2012.06.042.
@article{osti_22215608,
title = {Preparation of Mg/Al-LDHs intercalated with dodecanoic acid and investigation of its antiwear ability},
author = {Zhao, Dong, E-mail: zhaodongpinbo@163.com and Bai, Zhimin and Zhao, Fuyan},
abstractNote = {Graphical abstract: Comparable studies of nano Mg/Al-LDHs powder on the anti-wear properties of lubricating oil were carried out on four-ball and gear testing machine. Mg/Al-NO{sub 3}{sup −}-LDHs and Mg/Al-DA-LDHs powder in base oil possess an excellent friction-reducing property, with a friction coefficient at 23.9% and 22.2% which are lower than that of the base oil Highlights: ► We synthesized nano Mg/Al-NO{sub 3}{sup −}(DA)-LDHs via coprecipitation and anion exchange. ► The optimal exchanging condition is as follows: water dispersion and pH value of 5. ► The tribological properties of LDHs were studied on four-ball and gear machine. ► We reported nano LHDs as anti-wear materials in lubricates for the first time. ► The greatest decline in friction coefficient of lubricates with LDHs is up to 23.9%. -- Abstract: Layered double hydroxides (LDHs) intercalated with dodecanoic acid have been prepared by anion exchange with Mg/Al-NO{sub 3}{sup −}-LDHs as the precursor under acid condition with water and ethanol as the dispersion medium. The obtained materials were characterized by X-ray diffraction (XRD), thermogravimetric and differential thermal analyser (TG–DTA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and BET. Patterns of XRD and FTIR show that interlayer nitrate ions have substituted with dodecanoic acid and the gallery height has increased from 0.88 nm to 1.99 nm. The interlayer distance of the intercalated materials increases with the increase of pH value due to the different arrangement of interlayer anions. The tribological performance of LDHs precursor and intercalated LDHs in base oil were studied for the first time by using four-ball wear machine and gear testing machine. Experimental results show that the LDHs precursor and intercalated LDHs powder are excellent in friction-reducing, with decreases in friction coefficient by 23.9% and 22.2% respectively comparing with base oil.},
doi = {10.1016/J.MATERRESBULL.2012.06.042},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}