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Influence of Surface‐Modified Nanoparticles on the Hydrodynamics of Rising Bubbles
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-01-07 , DOI: 10.1002/ceat.201900234 Pouyan Fayzi 1 , Dariush Bastani 1 , Marzieh Lotfi 2 , Reinard Miller 3
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-01-07 , DOI: 10.1002/ceat.201900234 Pouyan Fayzi 1 , Dariush Bastani 1 , Marzieh Lotfi 2 , Reinard Miller 3
Affiliation
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Local velocities of bubbles rising in four different nanosilica solutions were investigated experimentally. Also, the density, viscosity, and surface tension of fumed nanosilica and modified nanosilica solutions were measured. Heat treatment and chemical functionalization were used to modify the properties of silica nanoparticles. It was found that the addition of nanosilica affected the hydrodynamics of the rising bubble by increasing the drag friction at the interface. However, environmentally responsive nanosilica particles behaved like surfactant molecules, due to the interfacial activity of hydrophilic and hydrophobic chains. Silica nanoparticles coated with both hydrophilic and hydrophobic agents had a stronger effect on the interfacial properties than those coated only with the hydrophobic agent.
中文翻译：
表面改性的纳米颗粒对上升气泡水动力的影响
实验研究了在四种不同的纳米二氧化硅溶液中气泡上升的局部速度。而且，测量了气相法纳米二氧化硅和改性纳米二氧化硅溶液的密度，粘度和表面张力。热处理和化学官能化用于修饰二氧化硅纳米粒子的性能。已经发现，纳米二氧化硅的添加通过增加界面处的阻力来影响上升气泡的流体力学。然而，由于亲水和疏水链的界面活性，对环境敏感的纳米二氧化硅颗粒表现得像表面活性剂分子。与仅涂覆疏水剂的二氧化硅纳米颗粒相比，涂覆亲水和疏水剂的二氧化硅纳米颗粒对界面性能的影响更大。
更新日期：2021-02-19
中文翻译：
表面改性的纳米颗粒对上升气泡水动力的影响
实验研究了在四种不同的纳米二氧化硅溶液中气泡上升的局部速度。而且，测量了气相法纳米二氧化硅和改性纳米二氧化硅溶液的密度，粘度和表面张力。热处理和化学官能化用于修饰二氧化硅纳米粒子的性能。已经发现，纳米二氧化硅的添加通过增加界面处的阻力来影响上升气泡的流体力学。然而，由于亲水和疏水链的界面活性，对环境敏感的纳米二氧化硅颗粒表现得像表面活性剂分子。与仅涂覆疏水剂的二氧化硅纳米颗粒相比，涂覆亲水和疏水剂的二氧化硅纳米颗粒对界面性能的影响更大。
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