Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 30 for “"sessile drop"”.
-
INTERFACIAL TENSION MEASUREMENT BY SESSILE DROP USING DIGITAL IMAGE PROCESSING
… of interfacial tensions, IFTs. The spinning drop technique is very popular but the sessile drop method offers the advantage that it is a static system. Most previous systems required a photograph to be taken and analysis was limited to key coordinates along the profile. A sessile drop system …
-
Experimental Investigation of Synthetic Fines Injection for Enhanced Residual CO2 Trapping during CO2 sequestration
… spectroscopy (XPS) analysis was performed at the sessile droplet location after the experiment, for analysis of surface chemistry. Contact angle measurements on Berea sandstone was performed for any difference between captive bubble and sessile drop method. A high-pressure, high-temperature (HPHT) …
-
Basics of detached Bridgman growth of Ge1-xSix crystals
… of potential crucible materials using the sessile drop technique. The surface tension of Ge and Ge1-xSix, as well as its temperature and concentration dependence, was determined simultaneously. <br>Growth experiments were performed in pBN (pyrolytic boron nitrite) and fused silica ampoules. …
-
Packaging of the MIT Microengine
… to thermal expansion mismatch with the glass. Sessile drop tests were conducted to determine which process parameters affect these strength-limiting factors. Voids were found to depend on the type of glass used, specifically the manufacturing process of the preforms, and wetting was found to …
-
Wettability and hydrophilicity of rigid and soft contact lens surfaces
… lens surface and a liquid. The wettability and hydrophilicity of both soft and rigid contact lens surfaces were determined using two novel techniques and an established method. The two novel techniques were the un-separated adherent quid/laser method and the adherent liquid/ maximum force method …
-
Characterization of PET samples processed in an RF oxygen discharge
… at high pressures (2.0 Torr).</p> <p>The sessile drop method was used to determine the relative change in the wettability of the sample surface along a continuum from hydrophobic to hydrophilic.</p> <p>The measured angles were compared to the initial readings (Figure 18) and showed a …
-
Investigation of spiropyrans and merocyanines in mixed thin films with long chain alkyl silanes: Towards a command surface for liquid crystal realignment
… molecules doped into polymers than in solution. Sessile drop contact angle measurements show a decrease from 70 $\pm$ 3 degrees to 63 $\pm$ 2 degrees for films prepared from the trialkoxy silanes upon irradiation with UV light. Evaluation of this system as a surface to control the realignment of …
-
ΜΕΛΕΤΗ ΤΩΝ ΕΠΙΦΑΝΕΙΑΚΩΝ ΚΑΙ ΔΙΕΠΙΦΑΝΕΙΑΚΩΝ ΙΔΙΟΤΗΤΩΝ ΤΗΣ ΣΤΑΘΕΡΟΠΟΙΗΜΕΝΗΣ ΖΙΡΚΟΝΙΑΣ ΚΑΙ ΣΥΣΤΗΜΑΤΩΝ ΖΙΡΚΟΝΙΑΣ ΣΕ ΕΠΑΦΗ ΜΕ ΡΕΥΣΤΑ ΜΕΤΑΛΛΑ
… K-1 AND DΓSS/DT=-392X10-3 Z.M-2 K-D. THE DT "SESSILE DROP EXPERIMENT" WAS USED IN ORDER TO STUDY THE WETTING OF THE ZO2/IN, SU, BI, PB, AG, CU, NI, CO SYSTEMS. THE RESULTS INDICATED THAT THE LIQUID METALS DO NOT WET THEZRO2(U>90 ). THE INTERFACIAL ENERGIES IN ALL THE INVESTIGATED SYSTEMS VARY …
-
Investigating the Surface Energy and Bond Performance of Compression Densified Wood
… adhesive type. Surface energy was studied using sessile drop contact angle measurement and the Chang model of acid-base, surface energy component calculation. Water, glycerol, formamide, ethylene glycol, and -Bromonapthalene were used as probe liquids. Densified and hygro-thermally treated …
-
Investigating Differences in Douglas-fir and Southern Yellow Pine Bonding Properties
… Surface energy was measured using the static sessile drop contact angle method and the acid/base approach. Southern yellow pine contained a lower average contact angle than Douglas-fir. Shear stress, % wood failure, and durability were measured using ASTM-D2559 with two adhesives, a one-part …
-
Gravitational effects on defect formation in melt grown photorefractive materials : bismuth silicate
… conditions. Wetting experiments revealed the sessile drop method to be inappropriate for the BSO-platinum system due to grain boundary pinning. No fundamental difference between the wetting behavior in a terrestrial and a low gravity environment was observed.
-
Wetting and Penetration Behavior of Resin/Wood Interfaces
… into wood lumens. Wetting was analyzed with the sessile drop method, which observed the initial contact angle and change in contact angle over 35s. Penetration was measured within each individual tracheid. The Lucas-Washburn equation analyzed the wetting and penetration by calculating the …
-
Novel Fluorous Hybrid Surface Modification Characterized by Wetting Dynamics, Morphology and Nanomechanics
… Wetting behavior was characterized using the sessile drop technique as well as Dynamic Contact Analysis (DCA, Wilhelmy Plate). Surface composition as well as near surface topology and morphology are characterized by X-ray Photoelectron Spectroscopy (XPS) and Tapping Mode Atomic Force …
-
Hydrogels containing linear and cyclic polyethers
… varies, generally EWC is enhanced due to the hydrophilicity of the polyether side chain. The macroscopic surface properties were investigated using a sessile drop technique and FTIR spectroscopy. At a molecular level surface properties were probed using an in vitro ocular spoilation model and …
-
Adhesion Fundamentals in Spotted Gum (Corymbia citriodora)
… Wetting measurements were performed using the sessile drop method. Initial and equilibrium contact angles, time-dependent wetting, and surface energy were determined. Time-dependent wetting and equilibrium contact angles were most informative. Initial contact angles and surface energy …
-
Fluid mechanics of liquid drops and thin-films
… of the complex phenomenon exhibited by liquid drops and liquid thin-films. Studying these systems is important both from fundamental and applied science perspectives. The first topic of the dissertation is on using pendant droplet tensiometry to measure surface tension of biological fluid …
-
Silane Surface Modification of Boron Carbide in Epoxy Composites
… found on borosilicate glass. Increased hydrophobicity and adhesive wettability confirmed by sessile drop method, led to PMCs with higher density, lower porosity and reduced water permeability. Mechanical testing by means of three-point bending (3PB), Iosipescu and double v-notch (DVN) …
-
Effect of surfactants and brine salinity and composition on spreading, wettability and flow behavior in gas-condensate reservoirs
… contact angles were measured using the Dual-Drop-Dual-Crystal (DDDC) technique and sessile drop method to characterize reservoir wettability and spreading behavior. Interfacial tension was measured using pendent drop shape analysis (DSA) technique and capillary rise techniques. Anionic and …
-
Der photorefraktive Effekt in vanadiumdotierten CdTe- und (Cd,Zn)Te-Kristallen
… sind Bestandteil der Arbeit. <br> <br>Mittels Sessile-Drop-Messungen wird gezeigt, dass sich der Kontaktwinkel zwischen einer CdTe-Schmelze und einem Quarzglassubstrat durch Aufrauen des Substrates deutlich erhöhen lässt. Dieser Effekt führt bei der Kristallzüchtung in aufgerauten …
Page 1 of 2