Experimental investigation of drag reduction induced by hydrogels crosslinked with Fe3+ in water-soluble and -insoluble liquid oils

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Lang Jiang, Haibao Hu, Luo Xie, Jun Wen, Wufang Yang, Feng Zhou
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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.

Abstract Image

水凝胶交联Fe3+对水溶性和非水溶性液体油减阻的实验研究
水凝胶在海洋运输中具有相当大的应用潜力,但很少有研究考察其在液体油中的减阻特性。本文首先通过光引发自由基聚合法制备了一系列由铁离子(Fe3+)交联的水凝胶,然后用流变仪测量了它们在含有水溶性甘油水溶液和水不溶性二甲基硅油(DSO)的流场中的减阻性能。结果表明,我们实验中考虑的所有水凝胶都可以降低两种实验液体油的阻力,其中它们与Fe3+交联导致阻力下降。高粘度的甘油水溶液在达到18 mPa·s时阻力减小幅度较大。水凝胶在不同的液体中表现出不同的减阻机理。在甘油水溶液中,由于水与甘油溶解形成的润滑层边界滑移导致阻力减少,而在DSO中,由于DSO不溶于水,水凝胶表面水层的边界滑移导致阻力减少。本研究揭示了水凝胶的减阻机理,可用于海洋运输。
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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
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.
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