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Dissertations / Theses on the topic 'Contact angle'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Lam, C. N. Catherine. "A study of advancing & receding contact angles and contact angle hysteresis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58840.pdf.

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2

He, Ying Bin. "Contact angle measurements on fine coal particles." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27882.

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This study investigates the techniques of contact angle measurement on fine coal particles. Two techniques, one direct and one indirect, have been investigated and modified. In the direct contact angle measurement technique, high pressure is employed to compress the coal powder into a pellet and the artificial surface of the pellet is employed in the contact angle measurements. The contact angle versus time and versus drop size on the pellet surface are examined. In addition, the pellet properties and factors affecting the pellet properties are also studied. A pellet surface model and a metho

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3

Hatipogullari, Metin. "Modelling of contact lines on heterogeneous substrates :stick-slip and contact angle hysteresis." Doctoral thesis, Universite Libre de Bruxelles, 2020. https://dipot.ulb.ac.be/dspace/bitstream/2013/304847/5/contratMH.pdf.

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This thesis highlights generic aspects of contact angle hysteresis and stick-slip motion,encountered in most practical wetting situations.First, we study the scaling relation between the heterogeneity strength and the amplitudeof the contact angle hysteresis it induces in the model configuration of a chemicallyheterogeneous microchannel. A key parameter which determines the qualitativefeatures is the heterogeneity wavelength. In particular, we identify a near-thresholdbehavior where the quadratic scaling between the heterogeneity amplitude and the resultinghysteresis, already known for a dilut

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4

Burel, Thomas. "Investigation of smooth contact angle treatment in porous media." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=30826.

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Some of the key challenges faced in the oil/gas extraction and carbon dioxide injection/storage processes are the presence of complex geometries and the significant effect of the capillary forces which arise at low capillary numbers. Therefore, the contact angle needs to be carefully treated. Mesoscopic techniques such as lattice Boltzmann methods are capable of dealing with lower capillary numbers as compared to the Navier-Stokes solvers, which can also implicitly capture the interface between two fluids. To investigate immiscible two-phase ows at low Reynolds and capillary numbers (Re < 1 an

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5

Vijayan, Ria. "Wheel-terrain contact angle estimation for planetary exploration rovers." Thesis, Luleå tekniska universitet, Rymdteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70676.

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During space missions, real time tele-operation of a rover is not practical because of significant signal latencies associated with inter planetary distances, making some degree of autonomy in rover control desirable. One of the challenges to achieving autonomy is the determination of terrain traversability. As part of this field, the determination of motion state of a rover on rough terrain via the estimation of wheel-terrain contact angles is proposed. This thesis investigates the feasibility of estimating the contact angles from the kinematics of the rover system and measurements from the o

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6

Gujjula, Sushrutha Reddy. "Numerical Investigation of Droplet Spread: Effect of Contact Angle Models." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1460447092.

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7

Ritchie, John. "Contact Angle Of A Nano-Drop On A Heterogeneous Surface." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/174.

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CONTACT ANGLE OF A NANO-DROP ON A HETEROGENEOUS SURFACE By John Andre Ritchie, Master of Science A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth University Virginia Commonwealth University, 2010 Major Director: Dr. Alenka Luzar, Professor of Chemistry We examine the relation between contact angle of a nanodrop of water and the location of surface-water interaction energy at the perimeter and beneath the drop. Young’s equations gives the relationship between surface tension, at the three phase solid liquid vapor interfac

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8

Sasges, Michael R. "The effect of gravity on fluid configuration and contact angle hysteresis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ27716.pdf.

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9

Moon, Jungun. "Effect of contact-release angle on hand-handrim for peak velocity." Virtual Press, 1992. http://liblink.bsu.edu/uhtbin/catkey/834622.

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The purpose of this study was to investigate the relationships between the arm joint angle at contact-release with peak velocity in experienced cerebral palsied athletes during wheelchair propulsion. The subjects (n = 5) exercised for a few minutes to familiarize themselves with the roller set up. After practice, each subject was asked to push the wheelchair as fast as possible up to 10 seconds. A tach-generator was attached to the core of the roller and interfaced to a computer via an eight bit A/D converter. The sampling rate of the roller speed was 200Hz. One video camera operating at 30 fr

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10

Dakpanon, Yaï Laurent. "Contributions expérimentale et théorique à l'identification de paramètres adéquats pour la modélisation de la mouillabilité en ingénierie." Vandoeuvre-les-Nancy, INPL, 2002. http://www.theses.fr/2002INPL103N.

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Ce travail, essentiellement expérimental, s'inscrit dans le cadre des travaux de modélisation mathématique de l'équipe; ceux ci cherchent à identifier des paramètres susceptibles de caractériser les propriétés de mouillabilité d'un support solide par un liquide, lesquelles dépendent du fluide environnant. Le premier résultat de cette étude est la validation de deux corrélations admissibles entre le volume d'une goutte sessile axisymétrique (contrôlé de façon incrémentale et quasi- statique), et l'aire (mesurée) de la surface mouillée associée; ceci tout au long d'un cycle manifestant un phénom

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11

Epstein, Lindsay(Lindsay M. ). "Bi-modal hemispherical sensors for three axis force and contact angle measurement." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127161.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2020<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references (pages 139-143).<br>Humans and animals demonstrate a unique ability to interact with the physical environment around them with coordination and control, including moving quickly across rugged terrain or deftly handling small objects. Much of this success is related to our ability to accurately perceive the world around us through a sense of touch. In order to better perform dynamic, physical interactions, such

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12

Diawara, Jules. "Mouillabilité de surfaces hétérogènes (fer/oxyde) par un alliage de zinc liquide." Phd thesis, Ecole Centrale Paris, 2011. http://tel.archives-ouvertes.fr/tel-00658768.

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Le phénomène de mouillage intervient dans de nombreux procédés, parmi lesquels la galvanisation en continu de tôles d'acier pour carrosserie automobile. Dans ce procédé, la tôle est immergée dans un bain de zinc liquide afin de la recouvrir d'une couche protectrice de zinc. Mais avant cela, cette tôle, laminée à froid, est soumise à un recuit sous atmosphère réductrice dans le but d'éliminer l'écrouissage et les oxydes de fer superficiels et favoriser ainsi les réactions de galvanisation. Des nouveaux aciers, dits à haute limite d'élasticité, ont été élaborés afin d'améliorer la sécurité passi

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13

Klier, Jurgen. "Liquid helium on weak binding substrates." Thesis, University of Exeter, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337745.

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14

Zhang, Ning. "SURFACE MODIFICATION OF MICRON-SIZE POWDERS BY PLASMA POLYMERIZATION." University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin971280515.

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15

Janeček, Valdislav. "Evaporation à l'échelle microscopique et à haut flux thermique." Paris 6, 2012. http://www.theses.fr/2012PA066512.

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Cette thèse étudie théoriquement les processus de transport au voisinage de la ligne triple de contact liquide-gaz-solide et leur impact sur l'évaporation macroscopique. Dans la première partie de la thèse, l'hydrodynamique au voisinage de la ligne de contact est étudiée sous les conditions de mouillage partiel. L'évaporation induite par le chauffage du substrat dans l'atmosphère de vapeur du même fluide est considérée. La relaxation de la singularité hydrodynamique de la ligne triple est considérée. La principale conclusion de la thèse est que l'effet Kelvin (dépendance de la température de s

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16

Jakubowicz, Agnieszka. "Investigation of growth kinetics of self-assembling monolayers by means of contact angle, optical ellipsometry, angle-resolved XPS and IR spectroscopy." Thesis, University of North Texas, 2004. https://digital.library.unt.edu/ark:/67531/metadc4602/.

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Absorption of octadecanethiol and p-nitrobenzenethiol onto gold surfaces from ethanol solutions has been studied by means of contact angle, optical ellipsometry, angle-resolved XPS (ARXPS), and with grazing angle total reflection FTIR. Growth of the monolayers from dilute solutions has been monitored and Langmuir isotherm adsorption curves were fitted to experimental data. A saturated film is formed within approximately 5h after immersion in solutions of concentrations ranging from 0.0005mM to 0.01mM. We found, that the final density of monolayer depends on the concentration of the solution.

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17

Butz, Julia [Verfasser], and Helmut [Akademischer Betreuer] Abels. "The Curve Diffusion Flow with a Contact Angle / Julia Butz ; Betreuer: Helmut Abels." Regensburg : Universitätsbibliothek Regensburg, 2018. http://d-nb.info/1168009448/34.

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18

Osborne, III Kenneth L. "Temperature-Dependence of the Contact Angle of Water on Graphite, Silicon, and Gold." Digital WPI, 2009. https://digitalcommons.wpi.edu/etd-theses/900.

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"The temperature dependence of the contact angle of water on graphite, silicon and gold was investigated under various conditions to test the Sharp-Kink Approximation. Despite correctly predicting the contact angle at room temperature, the ideal Sharp-Kink Approximation was not found to accurately describe the contact angle's temperature dependence. The discrepancies from the predicted contact angle were characterized in terms of a correction H(T) to the liquid-solid surface tension. H(T) was found to be linear in temperature and decreasing, and is consistent with electrostatic charge effects

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19

Jalalahmadi, Golnaz. "Development of A New Methodology for Contact Angle Measurment on Monolayer of Cells." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1374765701.

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20

Baird, Russell A. "Novel techniques for interfacial tension and contact angle measurements in polymer/CO2 systems." Connect to this title online, 2005. http://hdl.handle.net/1811/306.

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Senior Honors Thesis (Chemical Engineering)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains 27 p.; also includes graphics Includes bibliographical references (p. 24-25). Available online via Ohio State University's Knowledge Bank.

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21

Trapuzzano, Matthew A. "Controlled Wetting Using Ultrasonic Vibration." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7974.

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Many industrial processes such as printing and cleaning, as well as products like adhesives, coatings, and biological testing devices, rely on the wetting of liquids on a surfaces. Wetting is commonly controlled through material selection, coatings, and/or surface texture, but these means are sensitive to environmental conditions. Wetting is influenced by variables like surface tension, density, the surface chemistry, local energy barriers like surface roughness, and how the droplet is placed on the surface. Wetting of droplets can also be influenced externally in many ways such as introducing

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22

Bukiet, Frédéric. "Influence de la modification de l'hypochlorite de sodium par adjonction de tensioactifs sur l'énergie interfaciale et la viscosité dynamique de la solution d'irrigation." Thesis, Montpellier 1, 2014. http://www.theses.fr/2014MON12201/document.

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La complexité anatomique de l'endodonte implique un protocole d'irrigation efficace. L'hypochlorite de sodium doit donc pouvoir pénétrer dans l'ensemble du réseau endodontique afin d'exercer son activité antiseptique et protéolytique. Dans cet objectif, l'utilisation d'un tensioactif mélangé à l'hypochlorite de sodium constitue une approche potentiellement intéressante pour optimiser la pénétration et l'étalement de l'hypochlorite de sodium au sein du système canalaire. Cette thèse sur publications a donc pour objectif d'étudier l'influence de la modification de l'hypochlorite de sodium par ad

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23

Alvarellos, Jose. "Fundamental Studies of Capillary Forces in Porous Media." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5314.

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The contact angle defined by Young's equation depends on the ratio between solid and liquid surface energies. Young's contact angle is constant for a given system, and cannot explain the stability of fluid droplets in capillary tubes. Within this framework, large variations in contact angle and explained aassuming surface roughness, heterogeneity or contamination. This research explores the static and dynamic behavior of fluid droplets within capillary tubes and the variations in contact angle among interacting menisci. Various cases are considered including wetting and non-wetting gluids,

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24

Al-Siyabi, Zaid Khamis Sarbookh. "The contact angle, interfacial tension and viscosity of reservoir fluids : experimental data and modelling." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/1198.

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25

Fedeli, Livio. "Numerical techniques for the study of wetting on rough surfaces and contact angle hysteresis." Doctoral thesis, SISSA, 2011. http://hdl.handle.net/20.500.11767/4256.

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26

Martinez, Nelson. "Wettability of Silicon, Silicon Dioxide, and Organosilicate Glass." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12161/.

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Wetting of a substance has been widely investigated since it has many applications to many different fields. Wetting principles can be applied to better select cleans for front end of line (FEOL) and back end of line (BEOL) cleaning processes. These principles can also be used to help determine processes that best repel water from a semiconductor device. It is known that the value of the dielectric constant in an insulator increases when water is absorbed. These contact angle experiments will determine which processes can eliminate water absorption. Wetting is measured by the contact angle bet

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27

Hayoun, Pascaline. "Partial wetting of thin liquid films in polymer tubes." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066202/document.

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Les tubes polymères, de PDMS ou de PVC, sont des matériaux hydrophobes polyvalents et peu couteux. Ils sont très largement utilisés dans l'industrie pour transférer des fluides plus ou moins complexes tels que de l'eau potable, des émulsions (e.g lait), des suspensions (e.g café), ou encore des solutions de molécules actives (e.g médicament). La plupart de ces applications mettent en jeux des écoulements intermittents répétés de liquide qui peuvent contaminer le matériau. Cette étude a pour but de mieux comprendre comment ces écoulements de fluides complexes entraînent la contamination des tub

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28

Griffiths, Peter Robert. "Static and Dynamic Components of Droplet Friction." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4897.

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As digital microfluidics has continued to mature since its advent in the early 1980's, an increase in new and novel applications of this technology have been developed. However, even as this technology has become more common place, a consensus on the physics and force models of the motion of the contact line between the fluid, substrate, and ambient has not been reached. This uncertainty along with the dependence of the droplet geometry on the force to cause its motion has directed much of the research at specific geometries and droplet actuation methods. The goal of this thesis is to help cha

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29

Bushnell, Tyler D. "A Biomechanical Analysis of Sprinters vs. Distance Runners at Equal and Maximal Speeds." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/217.

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In the sport of track and field, sprinting and distance running represent two major categories of athletes. Sprinting is associated with power and speed, whereas distance running focuses on the economy of movement. With distance running there are elements of sprint technique that overlap. With distance events, there comes a time near the end of the race where economy gives way to speed. If the distance runners knew how to alter their technique in a way to become more sprint-like, this process could possibly be more successful. PURPOSE: This study compared the differences in technique between s

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30

Nguyen, Sébastien Thanh-Lâm. "Dynamique d'une interface en présence d'une singularité de contact solide/fluide." Paris 11, 2005. https://tel.archives-ouvertes.fr/tel-01390365.

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La solution d'un grande nombre de problèmes académiques, embrassant une grande variété de configurations : la cavité entrainée, la ligne de contact mobile, les écoulements thermocapillaires confinés, possède une singularité (discontinuité d'un champ ou d'une de ses dérivées). Il est bien connu que les méthodes spectrales sont très sensibles aux singularités, ce qui se traduit par la présence d'oscillations non-physiques (phénomène de Gibbs) au voisinage de la discontinuité. Pour cette raison, il est nécessaire de remplacer les conditions aux limites singulières par des conditions régulières fi

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31

Hayoun, Pascaline. "Partial wetting of thin liquid films in polymer tubes." Electronic Thesis or Diss., Paris 6, 2016. http://www.theses.fr/2016PA066202.

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Les tubes polymères, de PDMS ou de PVC, sont des matériaux hydrophobes polyvalents et peu couteux. Ils sont très largement utilisés dans l'industrie pour transférer des fluides plus ou moins complexes tels que de l'eau potable, des émulsions (e.g lait), des suspensions (e.g café), ou encore des solutions de molécules actives (e.g médicament). La plupart de ces applications mettent en jeux des écoulements intermittents répétés de liquide qui peuvent contaminer le matériau. Cette étude a pour but de mieux comprendre comment ces écoulements de fluides complexes entraînent la contamination des tub

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32

Koran, Karen M. "Surface interactions of surface washing agents an examination of detergency, interfacial tension and contact angle /." Cincinnati, Ohio : University of Cincinnati, 2007. http://www.ohiolink.edu/etd/view.cgi?ucin1186105489.

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33

SANTOS, SAMANTHA FONSECA DOS. "DSC, DMA, XPS, CONTACT ANGLE E AFM ANALYSIS OF DE ACC/PHAMCL THICK FILMS SURFACES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7887@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Neste trabalho, foram estudadas filmes poliméricos densos formadas por acetato de celulose (AcC) e polihidroxialkanoato de cadeia média PHAmcl, com diferentes concentrações relativas de cada polímero. Os filmes de PHAmcl/DAC foram preparadas a partir de soluções poliméricas, diluídas em dimetil cetona, na qual se realiza uma mistura com agitação contínua. Foram preparadas as amostras: AcC puro, PHAmcl puro e seis misturas com concentrações variando de 2 porcento a 12 porcento (m/v) de PHAmcl em AcC. Medidas de calorimetria

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34

Vaskov, Sean K. (Sean Kikeri). "Characterizing the spreading behavior of radius, contact angle, and spreading velocity of trisiloxane "superspreader" surfactants:/." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74913.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 35).<br>The ability of surfactants to lower surface tension makes them a key element in many products in a variety of industries. Trisiloxane surfactants have shown extraordinary wetting on hydrophobic surfaces, and are known as "superspreaders". Studies in the past have had inconsistent results characterizing the spreading of these surfactants. In this study, the radius and contact angle during spreading of different c

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35

Chandra, Santanu. "A NUMERICAL STUDY FOR LIQUID BRIDGE BASED MICROGRIPPING AND CONTACT ANGLE MANIPULATION BY ELECTROWETTING METHOD." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1197299987.

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36

KORAN, KAREN M. "SURFACE INTERACTIONS OF SURFACE WASHING AGENTS: AN EXAMINATION OF DETERGENCY, INTERFACIAL TENSION AND CONTACT ANGLE." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1186105489.

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37

Hoang, Van Quan. "Well-Balanced PISO Algorithm, Height Function, Dynamic Contact Angle, Liquid Film Flow over Complex Surface." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2024. http://www.theses.fr/2024ESMA0013.

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Le défi de construire un solveur pour la simulation du refroidissement à l'huile dans les extrémités des bobinages des moteurs électriques est l'objet de cette étude. Le premier segment se concentre sur les phénomènes de transfert thermique du flux de film liquide sur une surface complexe pré-mouillée. L'objectif est de comprendre les mécanismes d'interaction entre le liquide et la surface complexe. Une analyse détaillée des résultats de la simulation est réalisée, en tenant compte des effets de paramètres variables tels que le nombre de Reynolds et le nombre de Prandtl. Suite à cela, un solve

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38

Cunha, Alex Pereira da. "A method for measuring contact angle and influence of surface fluid parameters on the boiling heat transfer performance /." Ilha Solteira, 2019. http://hdl.handle.net/11449/183048.

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Orientador: Elaine Maria Cardoso<br>Resumo: O avanço de novas tecnologias, associado à minimização dos custos de fabricação e instala-ção, constitui um grande desafio para a área de refrigeração, uma vez que a geração de calor tem aumentado gradativamente nos últimos anos. Assim, a busca de novos fluidos com pro-priedades térmicas superiores aos comumente usados tornou-se indispensável para melhorar a eficiência energética. Nas últimas décadas os nanofluidos - dispersões de partículas de escala nanométrica (1 a 100nm) em um fluido-base - têm atraído especial interesse não somente da comunidade

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39

Emonot, Jérôme. "Contribution à l'étude du contact dynamique entre une nappe de liquide et un substrat solide." Lyon 1, 1994. http://www.theses.fr/1994LYO10232.

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Une operation d'enduction concerne le revetement en continu d'une surface solide par un liquide et se retrouve dans de nombreux secteurs de l'industrie (papier, plastique, textile non tisse, emballage, magnetique, photographie). L'interet porte par les scientifiques sur le sujet n'est pas nouveau mais force est de constater que le savoir faire technologique a jusqu'a present devance la comprehension physique pour le developpement des nombreux outils d'enduction existants. Celle-ci se heurte a deux problemes majeurs: la presence de surfaces libres et le contact du liquide avec la surface du sub

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40

Giljean, Sylvain. "Caractérisation Multi-Échelles de la Rugosité de Matériaux Métalliques à Usage Biomédical : Effet sur la Mouillabilité et l'Adhésion de Cellules Osseuses." Mulhouse, 2007. http://www.theses.fr/2007MULH0888.

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Ce travail a pour but de caractériser, à différentes échelles, par profilométrie tactile et par des méthodes de calcul rigoureuses, la topographie de biomatériaux métalliques (acier inoxydable, titane et alliage de titane) obtenue par polissage à différents grades de papier abrasif et par électroérosion. L'effet de la rugosité sur la mouillabilité. Quantifiée par gonion et l'effet de la rugosité sur le comportement de cellules osseuses humaines, quantifie iac r- analyse d'images est statistiquement déterminé par le calcul de la pertinence de 101 paramètres de rugosité à toutes les échelles all

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41

Manzo, Gabriel M. "Drop Motion on Superhydrophobic Fiber Mats." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1323465810.

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42

Eratak, Deniz Ozlem. "Determination Of Contact Angles Of Powders By Capillaric Dewatering Of Filter Cakes." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605901/index.pdf.

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Solid-liquid contact angle is an important parameter in many particulate processes of the mineral, ceramic and chemical industries. In particular, modification of the contact angle through surface active agents plays a crucial role in froth flotation of minerals. In the case of flat solid surfaces, direct measurement of the contact angle is possible. However, such flat surfaces can not be obtained with finely divided solids typically encountered in flotation applications. Then, indirect methods based on powder beds as thin layers of powders deposited on glass plates or packed columns are used

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43

Munzer, Charlotte. "Etude de l'action d'un bioadjuvant aux substances extracellulaires sur la microstructure et les caractéristiques de surface de pâtes cimentaires pour des bétons plus éco-respectueux." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAD028/document.

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L’influence de l’incorporation d’un produit bio sourcé comme adjuvant dans les matériaux cimentaires tant à l’état frais qu’à l’état durci a été étudiée. La présence du bioproduit ne provoque pas de modifications sur les résistances mécaniques et sur la microstructure des pâtes de ciment (ATG/ATD et DRX). Des essais de caractérisation du réseau poreux de mortiers et pâtes cimentaires ont montré un effet du bioproduit sur la qualité de la peau des échantillons. Un protocole de réalisation et de conservation d’échantillons de pâte cimentaire a été mis au point afin de permettre différents essais

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Liu, Jie. "Chemical composition of coal surface as derived from micro-FTIR and its effects on contact angle." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58636.

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In this study, in-situ image analysis, contact angle measurements, micro-FTIR spectroscopy and SEM are used to obtain information on the surface composition of coal. The heterogeneous coal surface is investigated with regard to the distribution of the chemical functional groups and its effect on hydrophobicity as derived from contact angle measurements. Contact angles obtained from sessile drop and captive bubble techniques are correlated with the semi-quantitative ratios from micro-FTIR spectroscopy. As part of the new methodology, image analysis and SEM are also applied in order to character

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Zhang, Yi. "Static and Dynamic Behaviour of Inter-granular Liquid Bridges: Hysteresis of Contact Angle and Capillary Forces." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16151.

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The wet granular material, a mixture of solid grains, liquid and air, has been studied in many industrial applications. Understanding the mechanical properties of wet granular materials is extremely important in geotechnical engineering. The cohesion in these materials arising from a liquid bridge between a pair of grains is produced by the capillary force and the viscous force. Thus, investigating the behaviour of liquid bridges between grains helps people obtain a better understanding of the factors influencing the cohesion, including the geometry and topological distribution of liquid bridg

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Stefin-Tyree, Amanda Joy. "Investigating Interfacial Behaviors of Silicon Dioxide in Contact with Liquids and Polymers in Contact with Water." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627404674037109.

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Frost, Daniel Wayne. "Study of adsorption of biological and nanoparticle solutions at the solid-liquid interface." Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/411.

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Lomax, Deborah. "Electrowetting and electrodeposition on graphitic surfaces." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/electrowetting-and-electrodeposition-on-graphitic-surfaces(0ecee720-fb95-48cb-bfb2-75e7adc305f3).html.

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Graphite and graphene electrodes are used to study two electrochemical processes: the decoration of these electrodes with Au metallic nanoparticles through the use of electrodeposition, and electrowetting, the potential-dependent change in hydrophobicity of a surface. Electrodeposition provides a useful route to electrode functionalisation, in particular to combine the enhanced properties of metallic nanoparticles with the advantageous features of carbon materials. A combination of cyclic voltammetry, chronoamperometry, and both ex situ and in situ atomic force microscopy are used to deduce th

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KIM, BONGSU. "LONG-TERM STABILITY OF PLASMA OXIDIZED POLYDIMETHYLSILOXANE SURFACES." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1100893247.

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Viswanadam, Goutham. "Water-Diesel Secondary Dispersion Separation Using Superhydrophobic Tubes of Nanofibers." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1373984491.

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