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Boundary Lubrication of Oxide Surfaces by Poly(L-lysine)- g -poly(ethylene glycol) (PLL- g -PEG) in Aqueous Media

Lee, Seunghwan ; Müller, Markus ; Ratoi-Salagean, Monica ; Vörös, Janos ; Pasche, Stéphanie ; De Paul, Susan ; Spikes, Hugh ; Textor, Marcus ; Spencer, Nicholas

In: Tribology Letters, 2003, vol. 15, no. 3, p. 231-239

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    Titre
    • Boundary Lubrication of Oxide Surfaces by Poly(L-lysine)- g -poly(ethylene glycol) (PLL- g -PEG) in Aqueous Media
    Auteur
    • Lee, Seunghwan. Laboratory for Surface Science and Technology, Department of Materials, ETH-Zürich, Sonneggstrasse 5, CH-8092, Zürich, Switzerland
    • Müller, Markus. Laboratory for Surface Science and Technology, Department of Materials, ETH-Zürich, Sonneggstrasse 5, CH-8092, Zürich, Switzerland
    • Ratoi-Salagean, Monica. Tribology Section, Department of Mechanical Engineering, Imperial College, SW7 2BX, London, U.K
    • Vörös, Janos. Laboratory for Surface Science and Technology, Department of Materials, ETH-Zürich, Sonneggstrasse 5, CH-8092, Zürich, Switzerland
    • Pasche, Stéphanie. Laboratory for Surface Science and Technology, Department of Materials, ETH-Zürich, Sonneggstrasse 5, CH-8092, Zürich, Switzerland
    • De Paul, Susan. Laboratory for Surface Science and Technology, Department of Materials, ETH-Zürich, Sonneggstrasse 5, CH-8092, Zürich, Switzerland
    • Spikes, Hugh. Tribology Section, Department of Mechanical Engineering, Imperial College, SW7 2BX, London, U.K
    • Textor, Marcus. Laboratory for Surface Science and Technology, Department of Materials, ETH-Zürich, Sonneggstrasse 5, CH-8092, Zürich, Switzerland
    • Spencer, Nicholas. Laboratory for Surface Science and Technology, Department of Materials, ETH-Zürich, Sonneggstrasse 5, CH-8092, Zürich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Tribology Letters, 2003, vol. 15, no. 3, p. 231-239. Kluwer Academic Publishers-Plenum Publishers
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:320840
    Summary
    In this work, we have explored the application of poly(L-lysine)-g-poly(ethylene glycol) (PLL-g-PEG) as an additive to improve the lubricating properties of water for metal-oxide-based tribo-systems. The adsorption behavior of the polymer onto both silicon oxide and iron oxide has been characterized by optical waveguide lightmode spectroscopy (OWLS). Several tribological approaches, including ultra-thin-film interferometry, the mini traction machine (MTM), and pin-on-disk tribometry, have been employed to characterize the frictional properties of the oxide tribo-systems in various contact regimes. The polymer appears to form a protective layer on the tribological interface in aqueous buffer solution and improves both the load-carrying and boundary-layer-lubrication properties of water