The wetting behaviour of several organic liquids in water on coal surfaces

Guy, David W.; Crawford, Russell J.; Mainwaring, David E.

doi:10.1016/0016-2361(95)00210-3

Cited by 30 publications

(11 citation statements)

References 19 publications

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“…The reference state chosen was that corresponding to no NaDS being present. Subtracting Equation 1 for the condition of interest from Equation 1 for the standard state condition yields: [4] Rearrangement of Equation 4 yields [5] where the superscript 0 refers to the standard state when no NaDS is added to the solution, i.e., the CaC 12 saturated solution. The γ SL is the solid/liquid surface tension of the mixed surfactant solution at a given NaDS concentration.…”

Section: Resultsmentioning

confidence: 99%

“…The ability of a liquid to spread over a solid surface is controlled by the overall free energy at the interfaces. If spreading of a liquid results in lowering the total free energy at the interfaces, then the wetting process can occur spontaneously (5). Adsorption of anionic or cationic surfactants on nonpolar solids such as Teflon can change the interfacial tension and contact angle (6)(7)(8)(9).…”

Section: Wettability Of Solid Surfaces By Surfactants Is An Importantmentioning

confidence: 99%

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Contact angle of surfactant solutions on precipitated surfactant surfaces. II. Effects of surfactant structure, presence of a subsaturated surfactant, pH, and counterion/surfactant ratio

Balasuwatthi

Dechabumphen

Saiwan

2004

J Surfact & Detergents

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The contact angle of a saturated aqueous surfactant solution on the precipitate of that surfactant was measured by using the sessile drop method. The sodium and calcium salts of alkyl sulfates (C 12 , C 14 , and C 18 ) had advancing contact angles higher than those of alkyl trimethylammonium bromides (C 14 , C 16 , and C 18 ). The measured advancing contact angles for several surfactant solutions did not substantially change with varying surfactant/counterion ratios; therefore, the precipitating counterion concentration (e.g., water hardness) had little effect on the wettability. The contact angles of fatty acid (C 12 and C 16 ) solutions did not show any dependence on pH between a pH of 4 and 10. The contact angles of saturated calcium dodecanoate (CaC 12 ) solutions containing a second subsaturated surfactant (sodium dodecyl sulfate: NaDS) decreased with increasing NaDS concentrations until reaching the critical micelle concentration of the surfactant mixture. These results show that the second suractant can act as a wetting agent in this saturated surfactant system. Application of Young's equation to contact angles showed that the solid/liquid surface tension can change substantially with surfactant concentration and be important in addition to the liquid/vapor surface tension in reducing contact angles. Application of the Zisman equation results in a "critical" surface tension for the CaC 12 or soap scum of 25.5 mN/m, which is comparable to difluoroethene.

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Section: Resultsmentioning

confidence: 99%

Section: Wettability Of Solid Surfaces By Surfactants Is An Importantmentioning

confidence: 99%

Contact angle of surfactant solutions on precipitated surfactant surfaces. II. Effects of surfactant structure, presence of a subsaturated surfactant, pH, and counterion/surfactant ratio

Balasuwatthi

Dechabumphen

Saiwan

2004

J Surfact & Detergents

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“…The contact angles of Milli-Q water on the wing surfaces were measured using the sessile drop method [30][31][32][33]. The contact angle measurements were carried out in air using an FTA1000 (First Ten Ångstroms, Inc., Portsmouth, VA, USA) instrument.…”

Section: Wettability Of the Wing Surfacesmentioning

confidence: 99%

Wing wettability of Odonata species as a function of quantity of epicuticular waxes

Nguyen

Webb

Hasan

et al. 2014

Vibrational Spectroscopy

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“…Using the Kratos Vision II software, peaks in the high-resolution regions of spectra were fitted with synthetic Gaussian-Lorentzian components. Surface wettability was determined from contact angle measurements using (KSV 101) employing the sessile drop method [51][52][53][54].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Polyterpenol Thin Film Surfaces on Bacterial Viability and Adhesion

et al. 2011

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Abstract:The nanometer scale surface topography of a solid substrate is known to influence the extent of bacterial attachment and their subsequent proliferation to form biofilms. As an extension of our previous work on the development of a novel organic polymer coating for the prevention of growth of medically significant bacteria on three-dimensional solid surfaces, this study examines the effect of surface coating on the adhesion and proliferation tendencies of Staphylococcus aureus and compares to those previously investigated tendencies of Pseudomonas aeruginosa on similar coatings. Radio frequency plasma enhanced chemical vapor deposition was used to coat the surface of the substrate with thin film of terpinen-4-ol, a constituent of tea-tree oil known to inhibit the growth of a broad range of bacteria. The presence of the coating decreased the substrate surface roughness from approximately 2.1 nm to 0.4 nm. Similar to P. aeruginosa, S. aureus presented notably different patterns of attachment in response to the presence of the surface film, where the amount of attachment, extracellular polymeric substance production, and cell proliferation on the coated surface was found to be greatly reduced compared to that obtained on the unmodified surface. This work suggests that the antimicrobial and antifouling coating used in this study could be effectively integrated into

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The wetting behaviour of several organic liquids in water on coal surfaces

Cited by 30 publications

References 19 publications

Contact angle of surfactant solutions on precipitated surfactant surfaces. II. Effects of surfactant structure, presence of a subsaturated surfactant, pH, and counterion/surfactant ratio

Contact angle of surfactant solutions on precipitated surfactant surfaces. II. Effects of surfactant structure, presence of a subsaturated surfactant, pH, and counterion/surfactant ratio

Wing wettability of Odonata species as a function of quantity of epicuticular waxes

The Effect of Polyterpenol Thin Film Surfaces on Bacterial Viability and Adhesion

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