Mono-dispersed AuNPs decorated enlarged halloysite nanotubes to encapsulate [HMIm][NTf2] microcapsules for improving the wear resistance of composites

• Published in: Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2023-12, Vol.175, p.107752, Article 107752
• Main Authors: Wang, Yanling, Zhang, Zhaozhu, Jiang, Wei, Wang, Kun, Liu, Meng, He, Yaohui, Liao, Chaoyin, Li, Peilong, Yuan, Junya, Yang, Mingming
• Format: Article
• Language: English
• Subjects: 1-hexyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide ([HMIm][NTf2]); Halloysite nanotube (HNTs); Microcapsules; Wear
• ISSN: 1359-835X; 1878-5840
• DOI: 10.1016/j.compositesa.2023.107752

In this study, a microcapsule, with gold nanoparticles dispersed on enlarged halloysite nanotube (HNTs) was prepared for encapsulating ionic liquid 1-hexyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide ([HMIm][NTf2]). The thermal conductivity and mechanical properties of the PBO/PTFE fabric/phenolic resin composite liner improved after incorporating [HMIm][NTf2]@HNTs/Au microcapsules. Pin-on-disk wear tests (55 MPa and 0.8 m/s for 120 min) demonstrated that the wear rate decreased from 9.4 × 10−15 m3 /(N⋅m) to 3.9 × 10−15 m3 /(N⋅m) when the filler content up to 2.0 wt% was added to a pure composites. This was attributed to a 40 nm adaptive tribofilm constructed on the counterpart surface due to filler.