Lang Jiang, Haibao Hu, Luo Xie, Jun Wen, Wufang Yang, Feng Zhou
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引用次数: 0
Abstract
Hydrogels have considerable potential for use in marine transportation, but few studies have examined its attribute of drag reduction in liquid oils. In this paper, we first prepared a series of hydrogels crosslinked by ferric ion (Fe3+) through photoinitiated radical polymerization, and then a rheometer was used to measure their performance in terms of reducing drag in flow fields containing the water-soluble aqueous glycerol solution and the water-insoluble dimethyl silicone oil (DSO). The results showed all the hydrogels considered in our experiments could reduce drag in both experimental liquid oils, where their crosslinking with Fe3+ led to the decline of drag reduction. The higher viscosity of the aqueous glycerol solution induced a higher reduction in drag until it reached a value of 18 mPa·s. The hydrogels exhibited different mechanisms of drag reduction in different liquids. Drag reduction was induced in the aqueous glycerol solution by the boundary slip on the lubricating layer formed by the dissolution of water and glycerol, while that in DSO was induced by the boundary slip on the water layer of the surface of the hydrogel due to the insolubility of DSO in water. The work here revealed the mechanism of drag reduction induced by hydrogels that could be applied to marine transportation.
期刊介绍:
Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as:
Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc.
Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc.
Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc.
Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc.
Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc.
Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.