Effects of the Sequence Distribution of Poly(acrylonitrile−butadiene) Copolymers on the Surface Chemical Composition As Determined by XPS and Dynamic Contact Angle Measurements

1997 ◽  
Vol 30 (12) ◽  
pp. 3698-3700 ◽  
Author(s):  
Lin Li ◽  
Chi-Ming Chan ◽  
Lu Tao Weng
Keyword(s):  
Contact Angle ◽  
Chemical Composition ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Surface Chemical ◽  
Sequence Distribution ◽  
Surface Chemical Composition ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Poly Acrylonitrile

Dynamic contact angle measurements on superhydrophobic surfaces

2015 ◽  
Vol 27 (3) ◽  
pp. 032107 ◽  
Author(s):  
Jeong-Hyun Kim ◽  
H. Pirouz Kavehpour ◽  
Jonathan P. Rothstein
Keyword(s):  
Contact Angle ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Superhydrophobic Surfaces ◽  
Angle Measurements ◽  
Contact Angle Measurements

Adsorption of modified dextrins to a hydrophobic surface: QCM-D studies, AFM imaging, and dynamic contact angle measurements

2010 ◽  
Vol 345 (2) ◽  
pp. 417-426 ◽  
Author(s):  
Iliana G. Sedeva ◽  
Renate Fetzer ◽  
Daniel Fornasiero ◽  
John Ralston ◽  
David A. Beattie
Keyword(s):  
Contact Angle ◽  
Dynamic Contact Angle ◽  
Hydrophobic Surface ◽  
Dynamic Contact ◽  
Angle Measurements ◽  
Afm Imaging ◽  
Contact Angle Measurements

Initial bioadhesion on medical glass packaging materials investigated by dynamic contact angle measurements

2013 ◽  
Vol 210 (5) ◽  
pp. 983-987 ◽  
Author(s):  
Oliver Köhler ◽  
Christine Müller ◽  
Anne Hermsdörfer ◽  
Holger Röhl ◽  
Christiane Ziegler
Keyword(s):  
Contact Angle ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Packaging Materials ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Glass Packaging ◽  
Medical Glass

Measurements of the Contact Angles for Various Fluids Which Are Widely Used in the Oilfields to Improve Oil Recovery

2018 ◽  
Author(s):  
M. Elsharafi ◽  
K. Vidal ◽  
R. Thomas
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Interfacial Tension ◽  
Oil Recovery ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Contact Angles ◽  
Rock Face ◽  
Angle Measurements ◽  
Contact Angle Measurements

Contact angle measurements are important to determine surface and interfacial tension between solids and fluids. A ‘water-wet’ condition on the rock face is necessary in order to extract oil. In this research, the objectives are to determine the wettability (water-wet or oil-wet), analyze how different brine concentrations will affect the wettability, and study the effect of the temperature on the dynamic contact angle measurements. This will be carried out by using the Cahn Dynamic Contact Angle. Analyzer DCA 315 to measure the contact angle between different fluids such as surfactant, alkaline, and mineral oil. This instrument is also used to measure the surface properties such as surface tension, contact angle, and interfacial tension of solid and liquid samples by using the Wilhelmy technique. The work used different surfactant and oil mixed with different alkaline concentrations. Varying alkaline concentrations from 20ml to 1ml were used, whilst keeping the surfactant concentration constant at 50ml.. It was observed that contact angle measurements and surface tension increase with increased alkaline concentrations. Therefore, we can deduce that they are directly proportional. We noticed that changing certain values on the software affected our results. It was found that after calculating the density and inputting it into the CAHN software, more accurate readings for the surface tension were obtained. We anticipate that the surfactant and alkaline can change the surface tension of the solid surface. In our research, surfactant is desirable as it maintains a high surface tension even when alkaline percentage is increased.

scholarly journals Evaluation of fouling potential of nanofiltration membranes based on the dynamic contact angle measurements

2012 ◽  
Vol 14 (3) ◽  
pp. 97-104 ◽  
Author(s):  
Marek Gryta ◽  
Justyna Bastrzyk ◽  
Diana Lech
Keyword(s):  
Contact Angle ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Deionized Water ◽  
Membrane Surfaces ◽  
Angle Measurements ◽  
Wilhelmy Plate ◽  
Contact Angle Measurements ◽  
Organic Fouling ◽  
Wilhelmy Plate Method

In this work the studies were performed on the intensity of fouling of the membrane NF90 and NF270 depending on the value of dynamic contact angle, previously determined for these membrane. The NF membranes were used for the separation of broth obtained during the fermentation of glycerol by Lactobacilluscasei bacteria. The measurements of dynamic contact angle were carried out using the Wilhelmy plate method. Taped membranes samples (support layer to support layer), wetted for 2 days in deionized water prior to testing, were used to study the contact angle of top layer and its organic fouling. Using deionized water; the contact angle values equal to 27-30o and 53-57o for NF270 and NF90, respectively, were obtained. As a consequence of adsorption of organic compound on the membrane surfaces, the contact angle obtained for both fouled membranes was about 55-56o, and this value was closer to the contact angle of non-fouled NF90 membrane. Therefore, the NF90 membrane was more resistant to organic fouling during the separation of broth.

Investigation of the surface rearrangement of poly(imide-siloxane) using dynamic contact angle measurements

2000 ◽  
Vol 14 (1) ◽  
pp. 107-121 ◽  
Author(s):  
C. K. Cho ◽  
J. H. Kang ◽  
Y. T. An ◽  
K. Cho ◽  
C. E. Park ◽  
...  
Keyword(s):  
Contact Angle ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Poly Imide
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