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Showing 1 to 20 of 58 for “"Surface Free Energy"”.
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Surface Free Energy Characterization of Powders
… angle measurements were conducted to study the surface chemistry of powdered minerals. The contact angle measurements were conducted on both flat and powdered talc samples, and the results were used to determine the surface free energy components using Van Oss-Chaudhury-Good (OCG) equation. It …
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Mechanical and surface free energy characterization of asphalt concrete for moisture damage detection
… AASHTO T-283 and dynamic modulus tests. The surface free energy (SFE), direct adhesion test (DAT) and blister test (BT) represent the component-level types. Samples for the mixture-level tests were prepared at different aging and conditioning durations. Aging durations include one hour and …
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Surface Forces between Silica Surfaces in CnTACl Solutions and Surface Free Energy Characterization of Talc
… measure the forces between two interacting surfaces in media. <i>The other</i> is to study the interfacial surface free energies of the particles in suspension. Direct surface force measurements were conducted between silica surfaces in octadecyltrimetylammonium chloride (C₁₈TACl) solutions …
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Oberflächeneigenschaften von Zahnrestaurationsmaterialien
The surface free energy describes the physical effects at boundary surfaces. It appears conceivable to optimize the surface free energy of restorative materials and to shift them into a range, where the initial adhesion of bacteria became more difficult. It is expected that materials with a surface …
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Investigating the Effect of Surface Properties on Ice Scaling in Eutectic Freeze Crystallization
Eutectic Freeze Crystallization (EFC) is an innovative technology that can be applied to treat reverse osmosis (RO) waste streams (brines), to produce pure salt and water. Scaling of the heat exchanger (HX) surface by both ice and salt is currently one of the major drawbacks in the industrial …
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Kr-F laser surface treatment of poly(methyl methacrylate), glycol-modified poly(ethylene terephthalate), and polytetrafluoroethylene for enhanced adhesion of Escherichia Coli K-12
… interactions are most influenced by substrate surface free energy, surface chemistry, topography, and rigidity[1]. Alteration of these properties through surface treatment has become a common approach to attain the desired cellular interaction. This study investigates Kr-F excimer laser(248 nm) …
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Multi-scale morphology development in solution coated conjugated polymers
… edge-on LC orientation at the top interface to surface energy minimization of alkyl side chains, and the face-on LC orientation in the bulk liquid and bottom interface to symmetry braking effect near the substrate. The out-of-plane molecular orientation is preserved in the LC mesophase and is …
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Wetting Phenomena Near the Melting Curve
… A new MC technique was developed with which the surface free energy of various interfaces can be calculated. The surface free energies of the interfaces involving the smooth hard wall were in agreement with both the present MD simulations and existing theoretical work for the fluid-wall …
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Cellulose Nanocrystals: Size Characterization and Controlled Deposition by Inkjet Printing
… a solvent mixture, and characterized in terms of surface chemical composition, surface free energy, polarity, roughness, ζ-potential, and surface charge distribution in air by X-ray photoelectron spectroscopy, contact angle measurements, AFM, streaming potential, and scanning Kelvin probe …
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Surface properties of poly(bisphenol-A-carbonate)
… the development of a technique to measure surface free energies of amorphous polymers <br></br>(b) an investigation of chemical polishing and <br></br>c) the problems of injection moulded polycarbonate. <br></br><br></br>Grooves inscribed in an amorphous polymer surface change in dimensions …
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Bio-inspired surface engineering for hydrophobicity
… innovations. This research explored specific surface structures on plant leaves with respect to their hydrophobicity in the context of the often arid Australian climate. The relationships between leaf surface structures and their hydrophobicity could inform the making of artificial surfaces …
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Effects of Crystalline Anisotropy on Solid-state Dewetting
… toward geometries which reduce the overall surface free energy of the system. This process, also sometimes referred to as agglomeration, occurs at elevated temperatures and is mediated by surface selfdiffusion. Regardless of initial conditions, dewetting eventually leads to the formation of …
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Characterization of Laser Modified Surfaces for Wood Adhesion
The controlled degradation of wood surfaces with infrared light from a CO2 pulsed laser facilitated adhesion without the use of additional resins. Laser modification creates a surface phenomenon that physically and chemically alters the natural biopolymer organization of lignocellulosic materials …
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On the Melting and Crystallization of Linear Polyethylene, Poly(ethylene oxide) and Metallocene Linear Low-Density Polyethylene
… stems, and temperature dependence of the lateral surface free energy. Analysis of spherulite growth rate and wide angle X-ray diffraction data for 26 linear polyethylene and 5 poly(ethylene oxide) fractions revealed that the undercooling at the regime I/II transition, the equilibrium fold surface …
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Growth and properties of metal-on-metal nanostructures: Ag on Cu(110) and Co on Ag(110)
… in part to a competition between lattice strain, surface and interfacial free energies. When Ag is deposited on clean, single-crystal Cu(110), it initially wets the surface with a (111) monolayer, and spontaneously nucleates nanowires as the coverage is increased. The nanowires nucleate at defects …
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Molecular simulation study of homogeneous crystal nucleation in n-alkane melts
… as a whole, and the chains end at the end surface of the cylindrical nucleus. For C20, the partial participation of chains in the crystal nucleus became apparent, where the critical nucleus consists of a bundle of crystal segments with the tails on the same chains extending into the …
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A Study of Crystallization in Bisphenol-A Polycarbonate
… the equilibrium melting temperature and the surface free energy. Including data from literature in the determination of the constants, the equilibrium melting temperature and surface free energy of BAPC is 303°C and 36.6mJ/m2, respectively. Comparing the lamellar thickness measurements by …
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A calorimetric study of the effects of surface energy in a type II superconductor
… study of the effects of the interphase surface free energy has been conducted on ellipsoidal samples of first and second kind superconductors. The measurements were performed using a specially designed magnetization calorimeter by two different techniques. The measurements were made on …
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On the Shape of the Free Surface of a Rubber-Like Material in Proximity to a Rigid Contactor
… Gurtin's pioneering work on the wrinkling of a free surface with residual stress and investigate the wrinkling of residually stressed solid films subjected to van der Waals or other types of interaction from a proximate contactor. We consider an incompressible rubber-like film of infinite depth, …
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Capillary-driven shape evolution in solid-state micro- and nano-scale systems
… and nano-scale devices. However, their high surface-area-to-volume ratio makes them unstable due to excess surface free energy. Capillarity drives a process known as dewetting, during which holes form, the film edges retract, and a thickened rim of material accumulates at the edges. Various …
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