The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform

C. A. Fuentes - One of the best experts on this subject based on the ideXlab platform.

  • Equilibrium Contact Angle measurements of natural fibers by an acoustic vibration technique
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014
    Co-Authors: C. A. Fuentes, L. Q.n. Tran, Ignaas Verpoest, H Pfeiffer, Kristian Beckers, Christine C Dupontgillain, A W Van Vuure
    Abstract:

    tSorption of fluids during typical wetting experiments on natural fibers produces a zero receding ContactAngle situation, leading to an incomplete analysis of their wetting behavior. An acoustic vibration methodwas used to measure “Equilibrium” Contact Angles on natural bamboo fibers. The correctness of the tech-nique is verified by performing the experiment with polyethylene terephthalate (PET) fibers and films,and comparing these results with the average of the cosine functions of the advancing and receding Anglesfor a given system. Surface energies and components of the surface energies of bamboo and PET fiberswere estimated using the “Equilibrium” Contact Angle data of various test liquids by using the acid–baseapproach. The results are in general agreement with X-ray photoelectron spectroscopy (XPS) analysis ofthe fiber’s surface. The findings contribute to a better understanding of the complex phenomena occur-ring during wetting of natural fibers and suggest that the Contact Angle obtained by forcing relaxationthrough acoustic vibration is a reliable method for study the wetting behavior of natural fibers.

  • Equilibrium Contact Angle measurements of natural fibers by an acoustic vibration technique
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014
    Co-Authors: C. A. Fuentes, L. Q.n. Tran, C. Dupont-gillain, Ignaas Verpoest, H Pfeiffer, Kristian Beckers, A. W. Van Vuure
    Abstract:

    Sorption of fluids during typical wetting experiments on natural fibers produces a zero receding Contact Angle situation, leading to an incomplete analysis of their wetting behavior. An acoustic vibration method was used to measure "Equilibrium" Contact Angles on natural bamboo fibers. The correctness of the technique is verified by performing the experiment with polyethylene terephthalate (PET) fibers and films, and comparing these results with the average of the cosine functions of the advancing and receding Angles for a given system. Surface energies and components of the surface energies of bamboo and PET fibers were estimated using the "Equilibrium" Contact Angle data of various test liquids by using the acid-base approach. The results are in general agreement with X-ray photoelectron spectroscopy (XPS) analysis of the fiber's surface. The findings contribute to a better understanding of the complex phenomena occurring during wetting of natural fibers and suggest that the Contact Angle obtained by forcing relaxation through acoustic vibration is a reliable method for study the wetting behavior of natural fibers. © 2014 Elsevier B.V.

Karin John - One of the best experts on this subject based on the ideXlab platform.

  • correction to Equilibrium Contact Angle and adsorption layer properties with surfactants
    Langmuir, 2019
    Co-Authors: Uwe Thiele, Jacco H Snoeijer, Sarah Trinschek, Karin John
    Abstract:

    The last line in eq 27 on page 7213 should read (Formula Presented) In the caption for Figure 2a on page 7213 it should read (a) In the macroscopic approach, the Equilibrium Contact Angle is determined by the solid-liquid interfacial tension γsl and the liquid-gas and solid-gas interfacial tensions γ and γ sg that depend on the respective surfactant concentrations Gd and Ga on the droplet and the adsorption layer. (Formula Presented).

  • Equilibrium Contact Angle and adsorption layer properties with surfactants
    Langmuir, 2018
    Co-Authors: Uwe Thiele, Jacco H Snoeijer, Sarah Trinschek, Karin John
    Abstract:

    The three-phase Contact line of a droplet on a smooth surface can be characterized by the Young equation. It relates the interfacial energies to the macroscopic Contact Angle θe. On the mesoscale, wettability is modeled by a film-height-dependent wetting energy f(h). Macro- and mesoscale descriptions are consistent if γ cos θe = γ + f(ha), where γ and ha are the liquid–gas interface energy and the thickness of the Equilibrium liquid adsorption layer, respectively. Here, we derive a similar consistency condition for the case of a liquid covered by an insoluble surfactant. At Equilibrium, the surfactant is spatially inhomogeneously distributed, implying a nontrivial dependence of θe on surfactant concentration. We derive macroscopic and mesoscopic descriptions of a Contact line at Equilibrium and show that they are consistent only if a particular dependence of the wetting energy on the surfactant concentration is imposed. This is illustrated by a simple example of dilute surfactants, for which we show excel...

D. Paul - One of the best experts on this subject based on the ideXlab platform.

A. W. Van Vuure - One of the best experts on this subject based on the ideXlab platform.

  • Equilibrium Contact Angle measurements of natural fibers by an acoustic vibration technique
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014
    Co-Authors: C. A. Fuentes, L. Q.n. Tran, C. Dupont-gillain, Ignaas Verpoest, H Pfeiffer, Kristian Beckers, A. W. Van Vuure
    Abstract:

    Sorption of fluids during typical wetting experiments on natural fibers produces a zero receding Contact Angle situation, leading to an incomplete analysis of their wetting behavior. An acoustic vibration method was used to measure "Equilibrium" Contact Angles on natural bamboo fibers. The correctness of the technique is verified by performing the experiment with polyethylene terephthalate (PET) fibers and films, and comparing these results with the average of the cosine functions of the advancing and receding Angles for a given system. Surface energies and components of the surface energies of bamboo and PET fibers were estimated using the "Equilibrium" Contact Angle data of various test liquids by using the acid-base approach. The results are in general agreement with X-ray photoelectron spectroscopy (XPS) analysis of the fiber's surface. The findings contribute to a better understanding of the complex phenomena occurring during wetting of natural fibers and suggest that the Contact Angle obtained by forcing relaxation through acoustic vibration is a reliable method for study the wetting behavior of natural fibers. © 2014 Elsevier B.V.

A W Van Vuure - One of the best experts on this subject based on the ideXlab platform.

  • Equilibrium Contact Angle measurements of natural fibers by an acoustic vibration technique
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014
    Co-Authors: C. A. Fuentes, L. Q.n. Tran, Ignaas Verpoest, H Pfeiffer, Kristian Beckers, Christine C Dupontgillain, A W Van Vuure
    Abstract:

    tSorption of fluids during typical wetting experiments on natural fibers produces a zero receding ContactAngle situation, leading to an incomplete analysis of their wetting behavior. An acoustic vibration methodwas used to measure “Equilibrium” Contact Angles on natural bamboo fibers. The correctness of the tech-nique is verified by performing the experiment with polyethylene terephthalate (PET) fibers and films,and comparing these results with the average of the cosine functions of the advancing and receding Anglesfor a given system. Surface energies and components of the surface energies of bamboo and PET fiberswere estimated using the “Equilibrium” Contact Angle data of various test liquids by using the acid–baseapproach. The results are in general agreement with X-ray photoelectron spectroscopy (XPS) analysis ofthe fiber’s surface. The findings contribute to a better understanding of the complex phenomena occur-ring during wetting of natural fibers and suggest that the Contact Angle obtained by forcing relaxationthrough acoustic vibration is a reliable method for study the wetting behavior of natural fibers.