Interfacial rheology of nano-TiO2 particles at air/water interface

Heqing Jiang; Xiaowei Hu; Shuna Duan; Chenyu Ma

doi:10.1117/12.2654899

28 September 2022 Interfacial rheology of nano-TiO₂ particles at air/water interface

Heqing Jiang, Xiaowei Hu, Shuna Duan, Chenyu Ma

Proceedings Volume 12339, Second International Conference on Cloud Computing and Mechatronic Engineering (I3CME 2022); 123390B (2022) https://doi.org/10.1117/12.2654899
Event: Second International Conference on Cloud Computing and Mechatronic Engineering (I3CME 2022), 2022, Chendu, China

Abstract

Titanium dioxide nanoparticles have been widely used in many industrial fields due to their outstanding physicochemical properties. Particularly, the inter-particle affinity can significantly affect the behaviors the fluid interfaces. In this paper, the rheological properties of TiO₂ nanoparticles at two-phase interface were summarized by measuring and calculating its dilatational viscoelasticity and dilatational phase angle changes in the adsorption and aggregation of TiO₂nanoparticles at the air/water interface using bubble and droplet morphology analysis methods. The experimental results show that the dilatational modulus and dilatational elasticity of the interface first increase with the concentration, and then decrease slightly after reaching the adsorption limit, while the dilatational viscosity continues to increase, the interface is still dominated by elasticity as a whole. With the increase of the dilatational frequency, the dilatational modulus and elasticity increase rapidly and then tardily, while the dilatational viscosity decreases quickly. It can be seen that the final interface tends to be pure elastic. Moreover, the phase Angle increases with the concentration and decreases with frequency. As a quantitative feature of viscoelasticity, the phase Angle also reflects the viscoelastic variation trend of the interface.

Citation Download Citation

Heqing Jiang, Xiaowei Hu, Shuna Duan, and Chenyu Ma "Interfacial rheology of nano-TiO₂ particles at air/water interface", Proc. SPIE 12339, Second International Conference on Cloud Computing and Mechatronic Engineering (I3CME 2022), 123390B (28 September 2022); https://doi.org/10.1117/12.2654899

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