Surfactant micelle characterization

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00:00:00 Welcome
00:01:44 Contents
00:02:24 Surfactants
00:03:29 Surfactants
00:05:31 Surfactants
00:07:13 Dynamic Light Scattering
00:09:22 Isothermal Titration Calorimetry. How does it work?
00:11:24 ITC – Before titration
00:11:35 Titration begins: First injection
00:12:17 Return to baseline
00:12:33 Second injection
00:12:37 Second return to baseline
00:12:46 Injections continue
00:12:53 Injections continue
00:12:59 End of titration
00:14:10 Applications
00:15:00 Micelle Size Characterization: Experimental
00:15:30 Micelle Size Characterization: Results
00:15:37 Micelle Size Characterization: Results
00:16:55 Micelle Size Characterization: Results
00:17:27 Micelle Size Characterization: Results
00:18:50 Determining CMC: Experimental
00:19:18 Determining CMC: Results
00:22:55 Micelle Size: Effect of Surfactant Concentration
00:23:52 Micelle Size: Effect of Surfactant Concentration
00:26:28 Micelle Size: Effect of Surfactant Concentration
00:28:05 Mixed Micelle Characterization
00:29:18 Mixed Micelle Characterization
00:29:43 Mixed Micelle Characterization
00:34:54 Determining CMC with ITC: Experimental
00:37:54 CMC determination in ITC demicellization experiment
00:40:59 Multi-CMC surfactant systems. Two-step self-association mechanism uncovered by ITC. Sodium oleate in water pH 7.5.
00:44:07 Further Information
00:44:41 Untitled
Surfactant micelles are used in a wide variety of applications, from personal care products to pharmaceutical formulations. Dynamic light scattering and isothermal titration calorimetry can be used to characterize micelle size and charge, determine the critical micelle concentration, and study the influence of surfactant concentration and dispersant conditions on micelle size. This webinar will discuss the use of dynamic light scattering and isothermal titration calorimetry for characterizing surfactant micelles. Various types amphiphilic (anionic, cationic, zwitterionic, nonionic) molecules go from monomer to monolayer to micelle as the concentration is increased. Data from Triton X-100, Tween 80, Nonidet P40, and various DTAB concentrations are presented.