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Mechanical Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

2008

Friction

Iowa State University

Articles 1 - 2 of 2

Full-Text Articles in Mechanical Engineering

Effect Of Conformational Change On Nanoscale Friction Behavior Of Organic Thin Films, Kanaga Karuppiah Kanaga Subramanian Jan 2008

Effect Of Conformational Change On Nanoscale Friction Behavior Of Organic Thin Films, Kanaga Karuppiah Kanaga Subramanian

Graduate Theses and Dissertations

The overarching theme of this dissertation is to probe relationships between structure of organic thin films and their specific functional property of friction in the context of various engineering applications. Two specific thin film systems were studied - biological macromolecules in total joint replacements and self-assembled alkanethiol monolayers for microdevice applications. Before delving into the actual systems, a thorough understanding of friction at small length scales was required. To address this, a friction study of two material pairs (Si3N4/mica and Si3N4/ultra-high molecular weight polyethylene) was conducted using a microtribometer and atomic force microscope (AFM) at the micro- and nanometer ...


Investigation Of Tribological Properties Of Biobased Polymers And Polymeric Composites, Satyam Kumar Bhuyan Jan 2008

Investigation Of Tribological Properties Of Biobased Polymers And Polymeric Composites, Satyam Kumar Bhuyan

Graduate Theses and Dissertations

Worldwide potential demands for replacing petroleum derived raw materials with renewable plant-based ones in the production of valuable polymeric materials and composites are quite significant from the social and environmental standpoints. Therefore, using low-cost renewable resources has deeply drawn the attention of many researchers. Among them, natural oils are expected to be ideal alternative feedstock since oils, derived from plant and animal sources, are found in profusion in the world. The important feature of these types of materials is that they can be designed and tailored to meet different requirements. The real challenge lies in finding applications which would use ...