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| Autori principali: | , , , , |
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| Natura: | Artículo Open Access |
| Pubblicazione: |
Wiley
2025
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| Soggetti: | |
| Accesso online: | https://4spepublications.onlinelibrary.wiley.com/doi/10.1002/pc.29985 |
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- Influence of lamellar MoS2 size on the crystallization process, surface mechanical properties, and friction behavior of POM self‐lubricating composites Qun Yang Kaitian Mei Yanghui Xiang Xuepeng Li Wangqing Wu Polymer Composites AbstractIn order to enhance the self‐lubricating properties of polymers, various types of solid lubricants have been incorporated, with lamellar molybdenum disulfide (MoS2) being the most widely used. However, impact of the MoS2 particle size on the molecular chain conformation and properties has been neglected. In this work, different sizes of MoS2 were incorporated into polyformaldehyde (POM), focusing on the crystallization process, surface mechanical properties and friction behaviors were analyzed. The results indicate that the MoS2 promotes the POM crystallization process, and the crystallinity is increased both before and after eliminating the thermal history. This leads to an increase in surface microhardness and modulus. As the particle size decreases, the composites show a decrease in the friction coefficient and wear rate when paired with both metal and POM friction balls. The greatest improvement in the friction coefficient was achieved at the particle size of 500 nm, which was 0.154 (POM ball) and 0.124 (metal ball), respectively. Meanwhile, the wear rates were 50.62%(POM ball) and 66.90%(metal ball) lower than those of pure POM, respectively. Interestingly, the friction coefficient decreases with increasing load under the action of POM friction balls, while the opposite trend is observed with metal friction balls.Highlights The crystallinity of all POM/MoS2 composite samples was increased. The modulus and hardness of POM composites were higher than those of pure POM. The best tribological properties of composites were obtained at MoS2 of 500 nm. 10.1002/pc.29985 http://onlinelibrary.wiley.com/termsAndConditions#vor