The mucilage, originating from the seeds of quince fruit was characterized as a potential bio-inspired water-based lubricant. The mucilage consists mainly of fine cellulose nanofibrils and charged hemicelluloses whose structure and properties were characterized here by atomic force microscopy (AFM) and tribological Pin-On-Disc (POD) experiments. The hemicellulose-decorated nanocellulose fibrils were 3.0±0.7 nm in thickness, had a very large aspect ratio and also had a tendency to self-align when dried on mica surface. Macroscale tribological tests showed that the mucilage was able to reduce the coefficient of friction of polyethylene/stainless steel contact to values below 0.03. Thus, we show that quince mucilage is a native nanocellulose material with a notable ability to lower friction.
- boundary lubrication
Hakala, T. J., Saikko, V., Arola, S., Ahlroos, T., Helle, A., Kuosmanen, P., Holmberg, K., Linder, M., & Laaksonen, P. (2014). Structural characterization and tribological evaluation of quince seed mucilage. Tribology International, 77, 24-31. https://doi.org/10.1016/j.triboint.2014.04.018