Bøger af Mohamed Mahmoud

Silicone surfactants have been widely used in our daily life and many industrial fields on the basis of their unusual properties. Only in the past decades has the use of silicone as a hydrophobic building block for the preparation of surfactants become common. The recent trend to combine silicone, polyoxyalkylene and carbohydrate moieties in the same molecule has resulted in a plethora of new compounds with new properties. In this book I report the preparation of a series of ¿glycopolysiloxanes¿ surfactants with different molecular weight. They were structurally characterized by IR, Proton NMR and MS. Specifically, the critical micelle concentration, effectiveness of surface tension reduction, maximum surface excess, minimum surface area and standard free energies of micellization and adsorption have been determined from aqueous surface tension measurements. All the surfactants have good surface properties and have low Critical Micelles concentration. The bacteriostatic power of these polymers was tested and compared under the same conditions in aqueous solution against common strains of Bacteria and Shows good results. The prepared Surfactants can be used for Pesticides.

Fluid-Solid Interactions in Upstream Oil and Gas Applications, Volume 78 delivers comprehensive understanding of fluid-rock interactions in oil and gas reservoirs and their impact on drilling, production, and reservoir hydrocarbon management. The book is arranged based on intervals of the oil and gas production process and introduces the basics of reservoir fluids and their properties, along with the rheological behavior of solid-fluid systems across all stages of the reservoir, including drilling processes, acidizing, and fracking. The reference then addresses different application-specific issues, such as solid-fluid interactions in tight reservoirs, the applications of nanoparticles, interactions during the EOR processes, and environmental concerns.