Micro-scratch behaviour of adsorbed film formed by aqueous copolymer lubricants with phosphate ester additive on Ti-coated surface
| Autor: | Oyong Novareza, Hongtao Zhu, A. Kiet Tieu, Buyung Kosasih, Bingjing Lin |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Polypropylene
Materials science Mechanical Engineering Oxide 02 engineering and technology Adhesion 021001 nanoscience & nanotechnology Phosphate Surfaces Coatings and Films chemistry.chemical_compound 020303 mechanical engineering & transports General Energy Adsorption 0203 mechanical engineering chemistry Chemical engineering Copolymer Lubrication Lubricant 0210 nano-technology |
| Zdroj: | Industrial Lubrication and Tribology. 69:881-890 |
| ISSN: | 0036-8792 |
| Popis: | Purpose This paper aims to assess the adsorption behaviour and the adhesion strength of lubricant films formed by polypropylene oxide-polyethylene oxide-polypropylene oxide (PPO-PEO-PPO) with phosphate ester additive on Ti-coated surface and to identify the influence of molecular architecture and phosphate ester additive. Design/methodology/approach The thickness of the adsorbed PPO-PEO-PPO with phosphate ester lubricant films on Ti surfaces was measured by ellipsometry. The adhesion strength of the copolymer and the copolymer with phosphate ester lubricants was studied by the micro-scratch tests; the scratch tracks on the surfaces were observed by atomic force microscopy and scanning electronic microscopy. Findings The copolymer with a higher weight percentage of PPO not only formed a thicker film but also showed stronger adhesion and better lubrication performance. The added phosphate ester increased the film thickness and improved the tribological behaviour. The finding reveals that the adsorbed film thickness which depends on the PPO chain length and the presence of phosphate ester has a considerable effect on the scratch behaviour. Originality/value This paper fulfils the studies about adsorption behaviour and lubrication mechanism of this new lubricant which has not been adequately investigated on the metal surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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