剪切增稠液(STFs)作为智能材料的一种,在施加剪切应力或提高剪切速率条件下表观黏度显著增加,可增大几倍至几十倍。实验室常见的STFs通常以无机氧化物作为分散相,乙二醇或聚乙二醇作为连续相,与部分添加剂混合制作而成。作为一种能快速感应外部刺激并做出响应的材料,STFs可在施加冲击后的毫秒级时间内,由液体向固体进行转变。STFs具有响应迅速、出力大、反复可逆等优点,但流变效应的不稳定性和剪切增稠作用机理研究的滞后仍阻碍着其在现代工业中的广泛应用。重点对STFs的最新理论模型、流变特性、流变特性影响因素等进行综述,为后续研究奠定基础。
Shear thickening fluids (STFs) are one of the categories of smart materials,whose viscosity increases considerably in the presence of shear strain or shear rate.These fluids were prepared by dispersing hard metal oxide particles into the carrier fluid with stabilizer additives.The main feature of these fluids was their ability to change from liquid to semi-solid state just in few milliseconds after applying an impact.Instability of rheological properties and shear thickening mechanism of STFs were the most important problems against the extensive application of STFs technology in modern industries.The focus was to review the latest related theoretical models,rheological properties,and influencing factors of rheological properties of shear thickening fluids,and layed the foundation for subsequent research.
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基金资助
国家自然科学基金(51605490)
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