应用化学 ›› 2023, Vol. 40 ›› Issue (7): 1044-1053.DOI: 10.19894/j.issn.1000-0518.230064

• 研究论文 • 上一篇    下一篇

MXenes的刻蚀方法及其在有机溶剂中的分散性

马雯雯1,2, 李彤阳1, 汤华国1, 乔竹辉1()   

  1. 1.中国科学院兰州化学物理研究所,固体润滑国家重点实验室,兰州 730000
    2.中国科学院大学,北京 100039
  • 收稿日期:2023-03-17 接受日期:2023-06-02 出版日期:2023-07-01 发布日期:2023-07-19
  • 通讯作者: 乔竹辉
  • 基金资助:
    山东省自然科学基金(ZR2021JQ20);国家重点研发计划(2022YFB3706204)

MXenes Etching Method and Dispersion in Organic Solvents

Wen-Wen MA1,2, Tong-Yang LI1, Hua-Guo TANG1, Zhu-Hui QIAO1()   

  1. 1.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100039,China
  • Received:2023-03-17 Accepted:2023-06-02 Published:2023-07-01 Online:2023-07-19
  • Contact: Zhu-Hui QIAO
  • About author:zhqiao@licp.cas.cn
  • Supported by:
    the Shandong Provincial Natural Science Foundation(ZR2021JQ20);the National Key R&D Program of China(2022YFB3706204)

摘要:

MXenes是一种亲水性二维无机材料,具有良好的可调控性。通过调控表面形貌和表面端基使其拥有更广泛的分散性能和应用特性。本研究对MXenes刻蚀方法和在有机溶剂中的分散性进行了研究,研究发现Al作为“A”层的MAX相更易刻蚀生成Ti3C2T x,且HF刻蚀可以得到多层Ti3C2T x,利用HCl+LiF原位生成HF刻蚀更容易得到单层Ti3C2T x 溶液。使用DMF等有机溶剂作为助分散剂可以将Ti3C2T x 由亲水性转变为疏水性,且其作为助分散剂可以将Ti3C2T x 有效分散在润滑油中; 而十二烷基磷酸修饰的Ti3C2T x 表现出较好的疏水性,水接触角高于90(°),可以制备更高浓度的Ti3C2T x -润滑油分散液。这为MXenes的有机分散和润滑油添加剂的应用提供了广阔的思路和坚实的基础。

关键词: MXenes, 刻蚀, 助分散, 表面修饰, 亲水性

Abstract:

MXenes is a hydrophilic two-dimensional inorganic materialand has a wide range of dispersion properties and application characteristics through the regulation of its morphology and surface end-group. The etching method and dispersibility in organic solvents are studied. It is found that Al as the “A” layer of the MAX phase is more likely to be etched to form Ti3C2T x . Multilayer Ti3C2T x can be obtainedby HF etching. Etching of MAX by in situ generated HF from HCl+LiFis more likely to obtain single layer Ti3C2T x solution. DMF and other organic solvents as dispersants can change Ti3C2T x from hydrophilic to hydrophobic, and Ti3C2T x can effectively dispersed in lubricating oil as the dispersant aid. Ti3C2T x modified with dodecyl phosphate shows a better hydrophobicity with the water contact angle of higher than 90(°), which can be used to prepare higher concentration Ti3C2T x -lubricating oil dispersion. This research provides a broad idea and a solid foundation for the application of MXenes in organic dispersion and lubricant additives.

Key words: MXenes, Etch, Auxiliary dispersion, Surface-modified, Hydrophilic

中图分类号: