Determination of Adhesion Tension of Liquids against Solids. A Microscopic Method for the Measurement of Interfacial Contact Angles

1932 ◽  
Vol 36 (4) ◽  
pp. 1178-1190 ◽  
Author(s):  
F. E. Bartell ◽  
E. J. Merrill
Keyword(s):  
Contact Angles ◽  
Microscopic Method ◽  
Interfacial Contact

Direct determination of contact angles of model soils in comparison with wettability characterization by capillary rise

2010 ◽  
Vol 382 (1-4) ◽  
pp. 10-19 ◽  
Author(s):  
Juan Carlos Ramírez-Flores ◽  
Jörg Bachmann ◽  
Abraham Marmur
Keyword(s):  
Capillary Rise ◽  
Direct Determination ◽  
Contact Angles

Determination of contact angles and pore sizes of porous media by column and thin layer wicking

1992 ◽  
Vol 6 (4) ◽  
pp. 413-428 ◽  
Author(s):  
C.J. Van Oss ◽  
R.F. Giese ◽  
Z. Li ◽  
K. Murphy ◽  
J. Norris ◽  
...  
Keyword(s):  
Porous Media ◽  
Thin Layer ◽  
Contact Angles ◽  
Pore Sizes

scholarly journals Antimicrobial Coatings from Hybrid Nanoparticles of Biocompatible and Antimicrobial Polymers

2018 ◽  
Vol 19 (10) ◽  
pp. 2965 ◽  
Author(s):  
Carolina Galvão ◽  
Luccas Sanches ◽  
Beatriz Mathiazzi ◽  
Rodrigo Ribeiro ◽  
Denise Petri ◽  
...  
Keyword(s):  
Colloidal Stability ◽  
Contact Angles ◽  
Silicon Wafers ◽  
Hybrid Nanoparticles ◽  
Ammonium Bromide ◽  
Antimicrobial Coatings ◽  
Cell Counts ◽  
Conversion Rates ◽  
Nanoparticles Dispersions

Hybrid nanoparticles of poly(methylmethacrylate) synthesized in the presence of poly (diallyldimethyl ammonium) chloride by emulsion polymerization exhibited good colloidal stability, physical properties, and antimicrobial activity but their synthesis yielded poor conversion. Here we create antimicrobial coatings from casting and drying of the nanoparticles dispersions onto model surfaces such as those of silicon wafers, glass coverslips, or polystyrene sheets and optimize conversion using additional stabilizers such as cetyltrimethyl ammonium bromide, dioctadecyldimethyl ammonium bromide, or soybean lecithin during nanoparticles synthesis. Methodology included dynamic light scattering, determination of wettability, ellipsometry of spin-coated films, scanning electron microscopy, and determination of colony forming unities (log CFU/mL) of bacteria after 1 h interaction with the coatings. The additional lipids and surfactants indeed improved nanoparticle synthesis, substantially increasing the conversion rates by stabilizing the monomer droplets in dispersion during the polymerization. The coatings obtained by spin-coating or casting of the nanoparticles dispersions onto silicon wafers were hydrophilic with contact angles increasing with the amount of the cationic polymer in the nanoparticles. Against Escherichia coli and Staphylococcus aureus, bacteria cell counts were reduced by approximately 7 logs upon interaction with the coatings, revealing their potential for several biotechnological and biomedical applications.

Spontaneous imbibition of water and determination of effective contact angles in the Eagle Ford Shale Formation using neutron imaging

2017 ◽  
Vol 28 (5) ◽  
pp. 874-887 ◽  
Author(s):  
Victoria H. DiStefano ◽  
Michael C. Cheshire ◽  
Joanna McFarlane ◽  
Lindsay M. Kolbus ◽  
Richard E. Hale ◽  
...  
Keyword(s):  
Contact Angles ◽  
Neutron Imaging ◽  
Spontaneous Imbibition ◽  
Eagle Ford Shale ◽  
Eagle Ford ◽  
Effective Contact ◽  
Shale Formation
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