Microwave-assisted synthesis of oleic acid-capped silver nanoparticles as lubricant additives
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https://doi.org/10.54939/1859-1043.j.mst.93.2024.71-76Keywords:
Silver nanoparticles; Lubricant additive; Capping agent; Oleic acid; Oleylamine.Abstract
Recently, metal nanoparticles have been studied extensively as lubricant additives. Owning to their nanometer size, the nanoparticles can fill micro defects on contacting surfaces, acting as repairing agents. In this work, we describe a simple and fast method to fabricate monodisperse silver nanoparticles using oleic acid as a capping agent. In particular, silver nitrate was reduced by oleylamine in the oleic acid medium using acetonitrile as a co-solvent, and the reaction was heated by a microwave source. Results showed that the particle size was greatly affected by varying the reductant concentration. The average diameter of synthesized nanoparticles ranges from 3.0 nm to 4.0 nm at optimum conditions. The dispersibility in the oil of the product is attributed to the long-chain alkyl from fatty acid grafted on the surface layer, which constitutes about 21% of the weight of the nanoparticles as determined by thermogravimetric analysis.
References
[1]. Vivek K. Bajpai, Madhu Kamle, Shruti Shukla, Dipendra Kumar Mahato, Pranjal Chadra, Seung Kyu Hwang, Pradeep Kumar, Yun Suk Huh, Young-Kyu Han "Prospects of using nanotechnology for food preservation, safety and security," Journal of Food and Drug Analysis, Vol. 26, pp. 1201-1214, (2018). DOI: https://doi.org/10.1016/j.jfda.2018.06.011
[2]. Yi Jiang, Di Liu, Minjung Cho, Seung Soo Lee, Fuzhong Zhang "In situ photocatalytic synthesis of Ag nanoparticles (nAg) by crumpled graphene oxide composite membranes for filtration and disinfection applications," Environ. Sci. Technol. Vol. 50, pp. 2514-2521, (2016). DOI: https://doi.org/10.1021/acs.est.5b04584
[3]. Zhengfeng Jia, Zhengfeng Jia, Zhengqi Wang, "The synthesis and tribological properties of Ag/polydopamine nanocomposites as additives in poly-alpha-olefin," Tribology International, Vol. 114, pp. 282-289, (2017). DOI: https://doi.org/10.1016/j.triboint.2017.04.039
[4]. Linghui Kong, Jianlin Sun, Yueyue Bao. "Preparation, characterization and tribological mechanism of nanofluids," RSC Advances, Vol. 7, pp. 12599-12609, (2017). DOI: https://doi.org/10.1039/C6RA28243A
[5]. Elena Husanu, Cinzia Chiappe, Andrea Bernardini, "Synthesis of colloidal Ag nanoparticles with citrate based ionic liquids as reducing and capping agents," Colloids and Surfaces A, Vol. 538, pp. 506-512, (2018). DOI: https://doi.org/10.1016/j.colsurfa.2017.11.033
[6]. Yaqiong Qin, Xiaohui Ji, Jing Jing, Hong Liu, Hong li Wu, Wensheng Yang, “Size control over spherical silver nanoparticles by ascorbic acid reduction,” Colloids and Surfaces A, Vol. 372, pp. 172-176, (2010). DOI: https://doi.org/10.1016/j.colsurfa.2010.10.013
[7]. Yongyang Zhu, Liuzhang Ouyang, Hao Zhong, Jiangwen Liu, Hui Wang, Huaiyu Shao, Zhenguo Huang, Min Zhu, “Efficient synthesis of sodium borohydride: Balancing reducing agents with an intrinsic hydrogen source in hydrated borax,” ASC Sustainable Chem. Eng. Vol. 35, pp. 13499-13458 (2010).
