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.
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Showing 1 to 9 of 9 for “"critical micelle concentrations"”.
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Preparation of green non-ionic surfactants from 2,3-epoxy-1-propanol
… and good surfactant properties including low critical micelle concentrations (CMC), low surface tension at the CMC point and good foaming characteristics which make their market prospects very favourable.<br/>
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Theoretical modeling of micellization and solubilization in ionic surfactant systems
… (that is, the capacity of the surfactant micelles to encapsulate hydrophobic solutes in their interior, leading to a significant increase in the aqueous solubility of the hydrophobic solutes). Accordingly, the development of comprehensive, predictive, molecularly-based theories that relate …
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Surface Characterization of Siloxane, Silsesquioxane, and Maleic Anhydride Containing Polymers at Air/Liquid Interfaces
… was used to determine the critical micelle concentrations (c.m.c.) of variable molar mass poly(dimethylsiloxane-b-(3-cyanopropyl)methylsiloxane-b-dimethylsiloxane) (PDMS-PCPMS-PDMS) triblock copolymers and a poly(dimethylsiloxane-b-2-ethyl-2-oxazoline) diblock copolymer. …
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Chemical and biological evaluation of antibiotic-based ionic liquids and GUMBOS against pathogenic bacteria
… (NMR) and elemental analysis. Melting points, critical micelle concentrations, and solubility were among the other physical properties investigated. Improved antibacterial activity was evaluated using Loewe’s Additivity Mathematical Model and interaction indices were established and compared to …
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Synthesis, Characterization, Critical Micelle Concentration and Antimicrobial Activity of Two-headed Amphiphiles
… protecting group to give the 2CCbn series. The critical micelle concentrations (CMC) were measured by the pyrene-based fluorescent probe method. The pyrene excited at 345 nm and fluoresces with maxima at 374 nm (I1) and 385 nm (I3). The stock solution and the dilution series for each amphiphiles …
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Micellar properties of spermicidal and microbicidal quaternary ammonium surfactants
… and hydrophilic moiety, will aggregate into micelles when dissolved in water above a narrow concentration range, termed the critical micelle concentration (CMC). This project investigates how the CMC relates to spermicidal and microbicidal properties. The CMC’s of the AD-nX and AT-nX …
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Novel amphiphilic diblock copolymers by RAFT-polymerization, their self-organization and surfactant properties
… The new macro-surfactants form micelles in water, whose size and geometry strongly depend on their composition, according to dynamic and static light scattering measurements. The micellization is shown to be thermodynamically favored, due to the high incompatibility of the blocks …
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Investigating the bioprotective properties of sugars
… involved the utilisation of surfactant-rich micelles; where by the impact sugars have on the free energy of exposure of hydrocarbon groups present within the surfactant micelles was examined. The observation made for sugar-surfactant study was then applied to explain the stabilisation of the …
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The effects of adjuvents upon the pesticide uptake and penetration of foliage
… of the surfactants were determined at various concentrations. Maximum"reduction of surface tension in the alkylphenol ethoxylate solutions was found with Triton X-35 and Triton X-45. Maximum reduction of surface tension in the alcohol ethoxylate solutions was found with the tetraoxyethylene …