Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives

In this paper, ultrathin WS2 nanosheets with thickness of about 5 nm were successfully prepared by a facile solid phase reaction method. The as-synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). On the ba...

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Main Authors:	Zhang, Xianghua, Xu, Hongxiang, Wang, Jiangtao, Ye, Xia, Lei, Weining, Xue, Maoquan, Tang, Hua, Li, Changsheng
Format:	Online
Language:	English
Published:	Springer US 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5045450/

id	pubmed-5045450
recordtype	oai_dc
spelling	pubmed-50454502016-10-03 Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives Zhang, Xianghua Xu, Hongxiang Wang, Jiangtao Ye, Xia Lei, Weining Xue, Maoquan Tang, Hua Li, Changsheng Nano Express In this paper, ultrathin WS2 nanosheets with thickness of about 5 nm were successfully prepared by a facile solid phase reaction method. The as-synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). On the basis of experimental results obtained under different reaction durations, a possible formation mechanism of WS2 nanosheets is proposed. The tribological performance of ultrathin WS2 nanosheets as additives in the 500SN base oil was tested by an UMT-2 ball-on-disc tribotester, and the worn surface of the steel disc was investigated by a non-contact optical profile testing instrument and SEM. The results showed that the friction coefficient and anti-wear property of base oil can be improved strikingly by adding ultrathin WS2 nanosheets. Especially, when the concentration of WS2 nanosheets was 1.0 wt.%, the corresponding lubricating oil exhibited the best tribological properties. Moreover, according to the investigation of the wear scar, an anti-friction and anti-wear mechanism is proposed. It is believed that the reduction of friction and wear must come from the addition of ultrathin WS2 nanosheets which can penetrate and enter the friction interface and form a continuous tribofilm on the rubbing face. Springer US 2016-10-01 /pmc/articles/PMC5045450/ /pubmed/27696323 http://dx.doi.org/10.1186/s11671-016-1659-3 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Zhang, Xianghua Xu, Hongxiang Wang, Jiangtao Ye, Xia Lei, Weining Xue, Maoquan Tang, Hua Li, Changsheng
spellingShingle	Zhang, Xianghua Xu, Hongxiang Wang, Jiangtao Ye, Xia Lei, Weining Xue, Maoquan Tang, Hua Li, Changsheng Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives
author_facet	Zhang, Xianghua Xu, Hongxiang Wang, Jiangtao Ye, Xia Lei, Weining Xue, Maoquan Tang, Hua Li, Changsheng
author_sort	Zhang, Xianghua
title	Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives
title_short	Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives
title_full	Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives
title_fullStr	Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives
title_full_unstemmed	Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives
title_sort	synthesis of ultrathin ws2 nanosheets and their tribological properties as lubricant additives
description	In this paper, ultrathin WS2 nanosheets with thickness of about 5 nm were successfully prepared by a facile solid phase reaction method. The as-synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). On the basis of experimental results obtained under different reaction durations, a possible formation mechanism of WS2 nanosheets is proposed. The tribological performance of ultrathin WS2 nanosheets as additives in the 500SN base oil was tested by an UMT-2 ball-on-disc tribotester, and the worn surface of the steel disc was investigated by a non-contact optical profile testing instrument and SEM. The results showed that the friction coefficient and anti-wear property of base oil can be improved strikingly by adding ultrathin WS2 nanosheets. Especially, when the concentration of WS2 nanosheets was 1.0 wt.%, the corresponding lubricating oil exhibited the best tribological properties. Moreover, according to the investigation of the wear scar, an anti-friction and anti-wear mechanism is proposed. It is believed that the reduction of friction and wear must come from the addition of ultrathin WS2 nanosheets which can penetrate and enter the friction interface and form a continuous tribofilm on the rubbing face.
publisher	Springer US
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5045450/
_version_	1613668740342218752

Synthesis of Ultrathin WS2 Nanosheets and Their Tribological Properties as Lubricant Additives

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