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 8 of 8 for “"dynamic surface tension"”.
-
Investigation of the effects of surfactant concentration on the boiling curve of water
… supports the hypothesis that the lowering of the dynamic surface tension, which correlates with the diffusion coefficient, is responsible for part of the lowering of the superheat. The fact that the larger shifting is correlated with the hydrophobic tail length supports the hypothesis that part of …
-
Development of novel methodologies to analyze the adsorption kinetics of nonionic surfactants
… solution is exposed to a clean water/air surface, it takes a finite time for the surfactant molecules to physically transport from the bulk aqueous solution to the surface in order to adsorb and reduce the surface tension. The time scales associated with the reduction in surface tension …
-
Effect of Non-Ionic Surfactants and Nano-Particles on the Stability of Foams
… are in agreement with the results of the dynamic surface tension measurements conducted in the present work. The TFPB studies were also conducted on the foam films stabilized in the presence of a mixture of C12EO8 and sodium dodecylsulfate (SDS) at different ratios. The results showed that …
-
Synthesis and process optimization of colloidal unimolecular polymer, cup, particle formation, and its interfacial surface tension behavior
… bubble pressure tensiometer. The equilibrium surface tension shows a dependence on concentration and the charge density of the CUP particle. The equilibrium surface tension becomes constant at higher concentrations due to the counterion condensation effect. The dynamic surface tension is …
-
Physicochernical mechanics of surfactant-enhanced boiling heat transfer
… by changing the way bubbles nucleate on the surface, grow, and depart from the surface. This thesis provides a mechanistic understanding of surfactant enhanced boiling from molecular and macroscopic perspectives with theory and experiments. First, a statistical mechanical model to predict …
-
Mineralized Bionanoparticle Pickering Emulsions
… employed to produce functional nanopatterned surfaces and interfaces by means of Pickering emulsions which were employed in biomimetic hydroxy apatite mineralization to produce inorganic biocompatible surfaces and hollow mineral spheres. The work accounts for the emerging interest and …
-
Characterization of Organosilicone Surfactants and Their Effects on Sulfonylurea Herbicide Activity
… on herbicide uptake, fluorescent dye studies on surface deposition, and various measurements of physico-chemical properties. In measuring physico-chemical properties, a logistic dose response relationship was found between adjuvant concentration and contact angle on parafilm. An AsymSigR …
-
Molecular fundamentals of foam fractionation
… solutions is a process dedicated to separate surface active molecules from each other due to their differences in surface activities. The process is based on forming bubbles in a certain mixed solution followed by detachment and rising of bubbles through a certain volume of this solution, and …