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The effects of ultrasonication on the microstructure, gelling and tribological properties of 12-HSA soft-nanocomposite with LaF3 nanoparticles
Department先进润滑与防护材料研究发展中心
Zhang RC(张若冲); Ding Q(丁奇); Zhang SW(张松伟); Li Y(李毅); Niu QB(牛清波); Yang LL(杨玲玲); Ye J(叶军); Hu LT(胡丽天)
The second department特种油脂与密封材料课题组(605)
2020
Source PublicationColloids and Surfaces A: Physicochemical and Engineering Aspects
Issuein pressPages:暂无
Abstract

During the preparation of soft-nanocomposites, ultrasonic treatment is widely utilized to improve the dispersion of nanomaterial in the gel system. However, both the nanomaterials and the low molecular weight organic gelators (LMWGs) could interact with the ultrasonic energy. In this paper, the influence of ultrasonication in the microstructure and properties of 12-hydroxystearic acid (12-HSA) soft-nanocomposites with LaF3 nanoparticles were investigated. It was found that despite ultrasonication could improve the dispersion of LaF3 nanoparticles, the viscoelastic properties of the gel system were greatly changed. Via characterizing the xerogel, the ultrasonic-induced fining effect in gelator fibers was confirmed, which accounted for the changed gel properties. Tribological evaluations show that the 12-HSA gel with coarse fibers shows better performance under low load, while the one with fine fibers exhibits better performance under higher load. With the aid of LaF3 nanoparticles, the adaptability of soft-nanocomposites for severe conditions could be further improved due to the cooperative effects between 12-HSA and LaF3 nanoparticles in constructing the boundary lubricating films. Although the nanomaterials are effective to improve the functionality of LMWG gels, the microstructure of gelator assembly and gel properties could be also significantly changed during the dispersion process of nanomaterials via sonication.

KeywordSoft-nanocomposite Ultrasonication Structure-activity relationship Gel lubricants Boundary lubrication
MOST Discipline Catalogue工学::材料科学与工程(可授工学、理学学位)
DOI10.1016/j.colsurfa.2019.124247
Indexed BySCI
If3.131
Language英语
compositor第一作者单位
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Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/25744
Collection先进润滑与防护材料研究发展中心
Corresponding AuthorDing Q(丁奇); Ye J(叶军); Hu LT(胡丽天)
Affiliation1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
3.Luoyang Bearing Research Institute Co., Ltd., Luoyang 471000, China.
4.China North Vehicle Research Institute, Beijing 100072, China.
Recommended Citation
GB/T 7714
Zhang RC,Ding Q,Zhang SW,et al. The effects of ultrasonication on the microstructure, gelling and tribological properties of 12-HSA soft-nanocomposite with LaF3 nanoparticles[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2020(in press):暂无.
APA Zhang RC.,Ding Q.,Zhang SW.,Li Y.,Niu QB.,...&Hu LT.(2020).The effects of ultrasonication on the microstructure, gelling and tribological properties of 12-HSA soft-nanocomposite with LaF3 nanoparticles.Colloids and Surfaces A: Physicochemical and Engineering Aspects(in press),暂无.
MLA Zhang RC,et al."The effects of ultrasonication on the microstructure, gelling and tribological properties of 12-HSA soft-nanocomposite with LaF3 nanoparticles".Colloids and Surfaces A: Physicochemical and Engineering Aspects .in press(2020):暂无.
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