Composites thermoplastiques à fibres continues : mise en œuvre et comportement au feu
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Viscous fingering with partial miscible fluids
Viscous fingering—the fluid-mechanical instability that takes place when a low-viscosity fluid displaces a high-viscosity fluid—has traditionally been studied under either fully miscible or fully immiscible fluid systems. Here we study the impact of partial miscibility (a common occurrence in practice) on the fingerin…
Partial coalescence of soap bubbles
We present the results of an experimental investigation of the merger of a soap bubble with a planar soap film. When gently deposited onto a horizontal film, a bubble may interact with the underlying film in such a way as to decrease in size, leaving behind a smaller daughter bubble with approximately half the radius…
Electrochemical Impedance Spectroscopy and Characterization of 20% Yttria doped Cerium on Silicon
Bare silicon and 20% yttria stabilized ceria on a silicon substrate are annealed. The annealed substrates are analyzed at varying temperatures using electrochemical impedance spectroscopy. The impedance data is fitted against appropriate equivalent circuits and the fitted data is characterized with an Arrhenius plot a…
Colloidal PbS and PbS/CdS Core/Shell Nanosheets
Liangfeng Sun, Advisor PbS/CdS core/shell nanosheets were synthesized using the cation exchange method.A strong quantum confinement was observed in the PbS core due to a decrease in its thickness, indicated by a blue shift in photoluminescence.HRTEM revealed a flat atomic interface between PbS and CdS, and also the re…
Predicting growth of gold nanoparticle by photochemical reduction process associated with mathematical modelling
Nowadays, to develop new generation of nanodevices, most researchers such as chemists, physicists, biologists, even the engineers are focusing their studies towards the uniqueness as well as the chemical properties of metal nanoparticles. Even, the mathematician also has governed the appropriate mathematical modelling…
Redukce korozních vrstev mosazi pomocí nízkotlakého nízkoteplotního plazmatu
Tato práce pojednává o odstranění vrstev korozních produktů, které se mohou vyskytovat na archeologických nálezech. K redukci korozních vrstev bylo použité nízkotlaké nízkoteplotní plazma. Experimenty byly provedeny na mosazných vzorcích. Modelové korozní vrstvy byly připravené dvěma různými způsoby. Některé sady vzor…
Novel oxidative-acidic bifunctional catalyst of tungsten-phosphate modified silica-titania
A novel oxidative-acidic bifunctional catalyst of silica-titania supported tungsten-phosphate was successfully synthesized and characterized. Different tungsten amount was impregnated into silica-titania followed by phosphoric acid treatment via sol gel method. The impregnation of WO3 and PO43- into TiO2-SiO2 followed…
Healing Capillary Films
Consider the dynamics of a healing film driven by surface tension, that is, the inward spreading process of a liquid film to fill a hole. The film is modelled using the lubrication (or thin-film) approximation, which results in a fourth-order nonlinear partial differential equation. We obtain a self-similar solution d…
Responsive Polymeric Nanoparticles
Figure 3.1 A thermoresponsive nanogel in its swollen state (T < VPTT) and in its shrunken state (T > VTPP) and schematic representation of a swollen and collapsed nanoparticle. The most frequently used family of responsive polymers in the synthesis of sensitive nanogels is that of temperature-sensitive poly(alkylacryl…
General Introduction and Definitions
Polymer microparticle (often a microsphere): A polymer particle of any shape with an equivalent diameter approximately from 0.1 to 100 µm. Polymer nanoparticle (often a polymeric nanosphere): A polymer particle of any shape with an equivalent diameter from a few to a hundred nanometers. In the literature this definiti…
Strain-engineering of thin polymer films : a novel route for the development of functional materials and microfluidic devices
Les deux systemes de creation d’une contrainte dans les films polymeriques ont ete developpes, chacun repondant a un gradient de gonflement du polymere dans la direction normale au film. Ce gonflement peut etre provoque soit par la presence d’un gradient de densite de reticulation dans la direction normale a la surfac…
Micelles, Liposomes, Bubble Liposomes, the Layer-by-Layer Approach, and Nanocapsules
Figure 10.1 Multifunctional liposome showing a unique bilayer. 10.2.2 Materials Used in the Preparation of LiposomesAs indicated previously, the main component of liposomes is amphiphilic lipids with the ability to self-assemble in solution into more or less complex aggregates, provided their concentration exceeds a c…
Dendrimers
Nature has inspired humankind for centuries and on many fronts, with translation of its beauty, functionality, and innate processes having been carefully studied and transformed into products and applications that shape the fields of science and engineering well into this century, and beyond. Structures of immense str…
PENGARUH PENAMBAHAN FLUX DOLOMITE PADA PROSES CONVERTING PADA TEMBAGA MATTE MENJADI BLISTER
Penelitian ini merupakan proses pemurnian lanjut tembaga matte dari smelting blast furnace pada metode pirometalurgi. Converting pada penelitian ini merupakan proses oksidasi tembaga matte dan logam tembaga yang masih memiliki pengotor dengan peniupan oksigen dan penambahan flux. Penelitian ini bertujuan untuk mengeta…
Capillary displacement of viscous liquids
When\na capillary tube is brought into contact with a wetting liquid,\nsurface tension forces overcome gravity and the liquid spontaneously\nrises into the tube until an equilibrium height is reached. The early\nviscous dynamics of the rise typically follow the well-known Lucas–Washburn\nlaw, which is independent of g…
Responsive Polymers: Types and Properties
The mechanism of free-radical polymerizations belongs to the class of so-called chain reactions. Chain reactions are characterized by the fast subsequent addition of monomers to an active center at the chain end. The activity of the growing chain is transferred to the adding unit. The active centers are present in ver…
Solution processed inorganic semiconductor solar cells
En aquesta tesi, l'estudi optoelectronica i fabricacio de diferents solucio de processament de semiconductors inorganics com ara PBS Quantum Dots i cel·lules solars perovskita s'han fabricat. Al llarg d'aquesta tesi mesuraments optoelectronics com fotoinducidas carrega Extraccio (PICE), fotoinducidas transitoria fotov…
Protein Stability during Hot Melt Extrusion: The Effect of Extrusion Temperature, Hydrophilicity of Polymers and Sugar Glass Pre-stabilization
Biodegradable polymers have been widely invesBgated for controlled release formulaBons for protein delivery.However, the processing stability of proteins remains a major challenge.Hot melt extrusion (HME) is a suitable producBon process for polymeric implants, as it is a simple and conBnuous process, and lacks the use…
Preparation of Micelles, Vesicles, and Liposomes
This chapter and the next two chapters will focus on the general preparation methods for micelles, vesicles, liposomes, nanoparticles, nanocapsules, and nanobottles. In this chapter will cover the preparation of micelles, vesicles, and liposomes because these require only physical methods, compared to most of the prep…