Experimental Technique to Study the Interaction Between a Bubble and the Particle-Laden Interface

Frontiers in Chemistry

Robert Pugh¹  Alexander Mayer²  Xingshi Yang²  Ghislain Bournival²  Seher Ata² 

[1] Department of Physics and Mathematics, Nottingham Trent University, Nottingham, United Kingdom;School of Mining Engineering, University of New South Wales, Sydney, NSW, Australia;

关键词: particle monolayer;    packing factor;    particle tracking;    surface pressure;    bubble coalescence;   

DOI  :  10.3389/fchem.2018.00348

来源: DOAJ

【 摘 要 】

An experimental apparatus was developed based on the Langmuir-Blodgett trough design to investigate the compression of monolayers of micron size spherical glass particles at the air-water interface and the interaction of an air bubble with the monolayers. The setup modifies the regular Langmuir-Blodgett trough by using a deep and clear glass cell. The cell allowed both the optical observation of the particle monolayer and the insertion of a capillary to produce a bubble under the layer of particles. Surface pressure-area (Π-A) isotherms were measured while the particles rearranged at the interface during compression and expansion for different pH values and particle wettability. We also analyzed the motion of particles in the monolayer by the surface pressure and packing factor to gain further insights into the behavior of particles during the coalescence process. The results suggested that the coalescence of a bubble was dependent on the formation of a defect in the particle layer and the defect size was both strongly influenced by particle hydrophobicity and the pH of the subphase.

【 授权许可】

Unknown