Details

Autor(en) / Beteiligte

• Wright, Roger A. E.
• Wang, Kewei
• Qu, Jun
• Zhao, Bin

Titel

Oil-Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction

Ist Teil von

• Angewandte Chemie, 2016-07, Vol.128 (30), p.8798-8802

Ort / Verlag

Weinheim: Blackwell Publishing Ltd

Erscheinungsjahr

2016

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• The development of high performance lubricants has been driven by increasingly growing industrial demands and environmental concerns. Herein, we demonstrate oil‐soluble polymer brush‐grafted inorganic nanoparticles (hairy NPs) as highly effective lubricant additives for friction and wear reduction. A series of oil‐miscible poly(lauryl methacrylate) brush‐grafted silica and titania NPs were synthesized by surface‐initiated atom transfer radical polymerization. These hairy NPs showed exceptional stability in poly(alphaolefin) (PAO) base oil; no change in transparency was observed after being kept at −20, 22, and 100 °C for ≥55 days. High‐contact stress ball‐on‐flat reciprocating sliding tribological tests at 100 °C showed that addition of 1 wt % of hairy NPs into PAO led to significant reductions in coefficient of friction (up to ≈40 %) and wear volume (up to ≈90 %). The excellent lubricating properties of hairy NPs were further elucidated by the characterization of the tribofilm formed on the flat. These hairy NPs represent a new type of lubricating oil additives with high efficiency in friction and wear reduction. Haarige Partikel: In Öl lösliche, mit Polymerbürsten beschichtete Nanopartikel (NPs) wurden synthetisiert und als Schmiermittelzusatz untersucht. Die NPs waren in einem Schmieröl bei tiefen und hohen Temperaturen außergewöhnlich stabil. In Tests bei 100 °C reduzierte der Zusatz von 1 Gew.‐% NPs die Reibung des Öls und das Abriebvolumen erheblich.