Coalescence or Bounce? How Surfactant Adsorption in Milliseconds Affects Bubble Collision

Liu, Bo1; Manica, Rogerio1; Liu, Qingxia1; Klaseboer, Evert2; Xu, Zhenghe1,3

2019-09-19

10.1021/acs.jpclett.9b01598

Journal of Physical Chemistry Letters   影响因子和分区

1948-7185

The coalescence between two colliding bubbles in ultraclean water can be 3 or 4 orders of magnitude faster than coalescence in contaminated solutions. This surprising result can be mostly explained by the mobile or immobile boundary conditions at the air-water interface. In this work, we employ a rising bubble technique to study bubble collisions in aqueous solutions with up to 2 mM surfactant. The experimental results clearly show that freshly generated bubbles can coalesce within milliseconds if they collide right after generation. However, once the bubbles reside in the bulk for tens of milliseconds, the coalescence is heavily hindered. Considering these results, we conclude that a clean air-water interface, rather than clean water, is required to achieve the mobile boundary condition that allows quick coalescence. These findings provide fundamental understanding for further improvements in bubble generation that will benefit industrial processes such as mineral flotation, oil extraction, and wastewater treatment.

SCI ; EI

英语

NI期刊

其他

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000487178900058

AMER CHEMICAL SOC

20194107509020

Air ; Boundary conditions ; Coalescence ; Froth flotation ; Industrial water treatment ; Surface active agents ; Wastewater treatment

Water Treatment Techniques for Industrial Use:445.1.2 ; Industrial Wastes Treatment and Disposal:452.4 ; Colloid Chemistry:801.3 ; Physical Chemistry:801.4 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

Web of Science

1.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
2.Inst High Performance Comp, 1 Fusionopolis Way, Singapore 138632, Singapore
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Liu, Bo,Manica, Rogerio,Liu, Qingxia,et al. Coalescence or Bounce? How Surfactant Adsorption in Milliseconds Affects Bubble Collision[J]. Journal of Physical Chemistry Letters,2019,10(18):5662-5666.

Liu, Bo,Manica, Rogerio,Liu, Qingxia,Klaseboer, Evert,&Xu, Zhenghe.(2019).Coalescence or Bounce? How Surfactant Adsorption in Milliseconds Affects Bubble Collision.Journal of Physical Chemistry Letters,10(18),5662-5666.

Liu, Bo,et al."Coalescence or Bounce? How Surfactant Adsorption in Milliseconds Affects Bubble Collision".Journal of Physical Chemistry Letters 10.18(2019):5662-5666.