Direct observation of the attachment behavior of hydrophobic colloidal particles onto a bubble surface

Soft Matter ◽  
2020 ◽  
Vol 16 (3) ◽  
pp. 695-702
Author(s):  
Nozomi Arai ◽  
Satoshi Watanabe ◽  
Minoru T. Miyahara ◽  
Ryoichi Yamamoto ◽  
Uwe Hampel ◽  
...  
Keyword(s):  
Contact Angle ◽  
Direct Observation ◽  
Single Particle ◽  
Colloidal Particles ◽  
Bubble Surface ◽  
Static Contact Angle ◽  
Attachment Behavior ◽  
Static Contact ◽  
Hydrophobic Particle

This article addresses the attachment behavior of a single particle onto a bubble from a microscopic view, in which a hydrophobic particle abruptly “jumps into” a bubble to satisfy its static contact angle.

scholarly journals Precise Static Contact Angle Measurements Using Pythagolas Rule

2014 ◽  
Vol 15 (2) ◽  
pp. 57-62
Author(s):  
Jin-Yeong Choi ◽  
Dong-Jun Kwon ◽  
Zuo-Jia Wang ◽  
Pyeong-Su Shin ◽  
Joung-Man Park
Keyword(s):  
Contact Angle ◽  
Static Contact Angle ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements

scholarly journals Numerical Study of Formation of a Series of Bubbles from an Orifice by Applying Dynamic Contact Angle Model

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Nan Chen ◽  
Xiyu Chen ◽  
Antonio Delgado
Keyword(s):  
Contact Angle ◽  
Gas Flow ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Static Contact Angle ◽  
Bubble Shape ◽  
Flow Rates ◽  
Bubble Detachment ◽  
Static Contact ◽  
Detachment Time

The dynamic contact angle model is applied in the formation process of a series of bubbles from Period-I regime to Period-II regime by using the VOF method on a 2D axisymmetric domain. In the first process of the current research, the dynamic contact angle model is validated by comparing the numerical results to the experimental data. Good agreement in terms of bubble shape and bubble detachment time is observed from a lower flow rate Q = 150.8 cm3/min (Re = 54.77, Period-I regime) to a higher flow rate Q = 603.2 cm3/min (Re = 219.07, Period-III regime). The comparison between the dynamic contact angle model and the static contact angle model is also performed. It is observed that the static contact angle model can obtain similar results as the dynamic contact angle model only for smaller gas flow rates (Q ≤ 150.8 cm3/min and Re ≤ 54.77)). For higher gas flow rates, the static contact angle model cannot produce good results as the dynamic contact angle model and has larger relative errors in terms of bubble detachment time and bubble shape.

scholarly journals Specific ion modulated thermoresponse of poly(N-isopropylacrylamide) brushes

2016 ◽  
Vol 18 (8) ◽  
pp. 6037-6046 ◽  
Author(s):  
Ben A. Humphreys ◽  
Joshua D. Willott ◽  
Timothy J. Murdoch ◽  
Grant B. Webber ◽  
Erica J. Wanless
Keyword(s):  
Contact Angle ◽  
Static Contact Angle ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements

Specific anion identity and concentration dictates the direction and magnitude of the shift in LCST for a pNIPAM brush determined by in situ ellipsometry, QCM-D and static contact angle measurements.

Research on the Prediction of Static Contact Angle in Circular Capillary Tubes

2012 ◽  
Vol 161 ◽  
pp. 21-25
Author(s):  
Jun Biao Wang ◽  
Dong Zi Zeng ◽  
Jian Jun Jiang
Keyword(s):  
Contact Angle ◽  
Height Function ◽  
Static Contact Angle ◽  
Liquid Volume ◽  
Capillary Tubes ◽  
Partial Wetting ◽  
Static Contact ◽  
Glass Tubes ◽  
Circular Capillary ◽  
New Discovery

New discovery was found by the capillary experiments with circular glass tubes and partial-wetting liquids that the partial liquid volume under moon surface could be expressed by equivalent height function H(r). Contact angle models suggested in this work, evaluated by Eq. 5, was eventually given by the concept of equivalent height, and so-determined models presented a much higher accuracy on prediction of contact angle compared to Jurin formula.

Smooth and Transparent Films Showing Paradoxical Surface Properties: The Lower the Static Contact Angle, the Better the Water Sliding Performance

Langmuir ◽  
2019 ◽  
Vol 35 (21) ◽  
pp. 6822-6829
Author(s):  
Sohei Kaneko ◽  
Chihiro Urata ◽  
Tomoya Sato ◽  
Roland Hönes ◽  
Atsushi Hozumi
Keyword(s):  
Contact Angle ◽  
Surface Properties ◽  
Static Contact Angle ◽  
Transparent Films ◽  
Static Contact
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