1. Sliding friction of hierarchically micro–micro textured polymer surfaces on ice
- Author
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Leo Hillman, Yu Jiang, Mika Suvanto, Tapani A. Pakkanen, Alexander Diem, Joel Voyer, and Kati Mielonen
- Subjects
Polypropylene ,chemistry.chemical_classification ,Materials science ,010504 meteorology & atmospheric sciences ,Abrasive ,0211 other engineering and technologies ,02 engineering and technology ,Polymer ,Adhesion ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,chemistry.chemical_compound ,chemistry ,Natural rubber ,visual_art ,visual_art.visual_art_medium ,General Earth and Planetary Sciences ,Texture (crystalline) ,Composite material ,Micro/Micro ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,Tribometer - Abstract
The ice friction behavior of various microtextured polymer surfaces was studied with respect to ice temperature and applied load using a customized linear tribometer. Similar micropillar patterns were replicated on polypropylene and two rubber compounds, and when hierarchical micro–micro textures were present, all the materials exhibited superhydrophobicity. Taller protective micropillars were shown to be crucial for protecting the smaller microtextures from abrasive wear. The mechanical properties of the polymers affected the sliding friction of the microtextured surfaces on ice. High loading of hierarchical textures on rigid polypropylene or operation near the ice melting point tended to increase its adhesion tendency or resisting behavior. The sliding performance of the hard and soft rubber compounds was temperature-dependent, and the texture on the soft rubber influenced the sliding friction differently depending on the ice temperature. Consequently, textural modifications of the sliding surface enabled a certain degree of control over the sliding friction behavior on ice.
- Published
- 2019