二维WS2纳米片的规模化可控制备及其摩擦学性能

doi:10.16085/j.issn.1000-6613.2022-1908

化工进展 ›› 2023, Vol. 42 ›› Issue (9): 4783-4790.DOI: 10.16085/j.issn.1000-6613.2022-1908

二维WS₂纳米片的规模化可控制备及其摩擦学性能

向硕¹(), 卢鹏¹(), 石伟年², 杨鑫¹, 何燕¹, 朱立业³, 孔祥微⁴

^1.陆军勤务学院油料系，重庆 401311
^2.96725部队，云南红河哈尼族彝族自治州 651400
^3.中国人民解放军成都质量监督站, 四川成都 610000
^4.海军航空大学，山东烟台 264000

收稿日期:2022-10-14 修回日期:2022-11-16 出版日期:2023-09-15 发布日期:2023-09-28
通讯作者: 卢鹏
作者简介:向硕（1986—），男，博士，讲师，研究方向为二维润滑材料。E-mail：xslaplace@163.com。
基金资助:
国家自然基金青年基金(51704301);重庆市自然科学基金(cstc2019jcyj-msxmX0453)

Controllable and large-scale preparation of two-dimensional WS₂ nanosheet and its tribological properties as lubricant additives in lithium grease

XIANG Shuo¹(), LU Peng¹(), SHI Weinian², YANG Xin¹, HE Yan¹, ZHU Liye³, KONG Xiangwei⁴

^1.Oil and Lubricant Department, Army Logistics Academy, Chongqing 401311, China
^2.Unit 96725 of PLA, Honghe Hani and Yi Autonomous Prefecture 651400, Yunnan, China
^3.Chengdu Quality Supervision Station of PLA，Chengdu 610000, Sichuan, China
^4.Naval Aeronautical University, Yantai 264000, Shandong, China

Received:2022-10-14 Revised:2022-11-16 Online:2023-09-15 Published:2023-09-28
Contact: LU Peng

摘要/Abstract

摘要：

以微米级WS₂为原料、异丙醇为剥离介质，通过超声辅助液相剥离、液相级联离心和固液分离的策略制备二维WS₂纳米片，采用X射线衍射仪、拉曼光谱仪、扫描电子显微镜、透射电子显微镜、热重-差示扫描量热联用分析仪等对二维WS₂纳米片的微观结构、形貌和热稳定性进行表征。借助四球摩擦磨损试验机考察二维WS₂纳米片作为锂基润滑脂添加剂的极压、减摩和抗磨性能，利用电子显微镜对钢球磨斑表面进行分析。结果表明，实现了不同片径二维WS₂纳米片的规模化制备，且所制备的样品晶型无破坏、晶格完整，具有较好的热稳定性；二维WS₂纳米片的片径对锂基润滑脂的摩擦学性能有显著影响，随着片径减小，其极压、减摩和抗磨性能均明显提升；当WS₂-3纳米片质量分数添加量为2.0%时，最大无卡咬负荷和烧结负荷较锂基脂分别提升63.3%和86.1%，摩擦系数和磨斑直径减小19.3%和34%。

关键词: 二维WS₂纳米片, 超声辅助液相剥离, 液相级联离心, 润滑添加剂, 摩擦学性能

Abstract:

A sonication-assisted liquid phase exfoliation method was demonstrated based on liquid cascade centrifugation and freeze-drying method, which was designed to prepare two-dimensional WS₂ nanosheet. X-ray diffraction (XRD), Raman, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and thermogravimetric and differential scanning calorimetry (TG-DSC) analyses were used to examine the morphology of two-dimensional WS₂ nanosheets and crystalline structures as well as their thermal stability. A four ball tribometer was used to characterize the extreme pressure, friction-reducing and anti-wear properties of lithium grease containing two-dimensional WS₂ nanosheets, and the wear scar of steel balls were observed under SEM. The results showed that the controllable and large-scale preparation of two-dimensional WS₂ nanosheet was achieved, and the prepared samples possessed consistent crystal form and lattice as well as good thermal stability. The tribological properties of all of the lithium grease containing two-dimensional WS₂nanosheets were improved in comparison with lithium-based grease. Furthermore, 2.0% of WS₂-3 (as the optimal concentration) in comparison with lithium-based grease, improved the P_B and P_D values by 63.3% and 86.1%, and reduced friction coefficient and wear scar diameter by 19.3% and 34%, respectively.

Key words: two-dimensional WS₂ nanosheet, sonication-assisted liquid phase exfoliation, liquid cascade centrifugation, lubricating additive, tribological properties

中图分类号:

TH117.1

向硕, 卢鹏, 石伟年, 杨鑫, 何燕, 朱立业, 孔祥微. 二维WS₂纳米片的规模化可控制备及其摩擦学性能[J]. 化工进展, 2023, 42(9): 4783-4790.

XIANG Shuo, LU Peng, SHI Weinian, YANG Xin, HE Yan, ZHU Liye, KONG Xiangwei. Controllable and large-scale preparation of two-dimensional WS₂ nanosheet and its tribological properties as lubricant additives in lithium grease[J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4783-4790.

图/表 8

图1 超声辅助液相剥离制备二维WS2纳米片的流程图

图2 二维WS2纳米片的形貌表征

图3 二维WS2纳米片的结构表征

图4 二维WS2纳米片的结构表征TG-DSC曲线图

图5 二维WS2纳米片对锂基脂极压性能的影响

图6 二维WS2纳米片对锂基脂减摩性能的影响

图7 二维WS2纳米片对锂基脂抗磨性能的影响

图8 WS2-3 添加量对钢球磨斑表面形貌的影响

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二维WS₂纳米片的规模化可控制备及其摩擦学性能

Controllable and large-scale preparation of two-dimensional WS₂ nanosheet and its tribological properties as lubricant additives in lithium grease

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