Solubilization of octane in electrostatically-formed surfactant-polymer complexes.
Hui Zhang1, Benjamin Zeeb2, Hanna Salminen2
1Department of Food Science and Nutrition, College of Biosystem Engineering and Food Science, Zhejiang University, Yuhangtang Road 866, 310058 Hangzhou, China; Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany.
Journal of Colloid and Interface Science
|January 11, 2014
Summary
Anionic polymers like carboxymethyl cellulose enhance oil solubilization in certain surfactant micelles, particularly cationic ones. This study explores polymer-surfactant interactions and their impact on micelle stability and oil solubilization mechanisms.
Area of Science:
- Colloid and Surface Science
- Polymer Science
- Physical Chemistry
Background:
- Surfactant micelles are crucial for solubilizing hydrophobic substances in aqueous solutions.
- Polymers can significantly influence micelle properties, affecting their stability and functionality.
- Understanding polymer-surfactant interactions is key to designing effective formulations for solubilization.
Purpose of the Study:
- To investigate the effect of anionic carboxymethyl cellulose on octane solubilization in various surfactant micelles.
- To explore the interactions between carboxymethyl cellulose and different types of surfactants (anionic, nonionic, cationic).
- To elucidate the mechanism of oil solubilization in surfactant-polymer complexes.
Main Methods:
- Dynamic light scattering (DLS) to analyze micelle size and stability.
- Microelectrophoresis to determine surface charge properties of micelles.
- Turbidity measurements to quantify solubilization efficiency.
- Isothermal titration calorimetry (ITC) to characterize surfactant-polymer interactions.
Main Results:
- Anionic carboxymethyl cellulose accelerated octane solubilization in cationic cetyltrimethylammonium bromide (CTAB) and CTAB-Tween 80 micelles.
- No significant effect on octane solubilization was observed in nonionic and anionic micelles.
- Isothermal titration calorimetry revealed distinct physiochemical interaction regions based on surfactant concentration.
- Potential shape transitions of polymer-micelle complexes during solubilization were indicated.
Conclusions:
- Electrostatically formed surfactant-polymer complexes play a critical role in oil solubilization.
- The interaction between carboxymethyl cellulose and cationic surfactants is particularly effective for enhancing octane solubilization.
- A proposed mechanism highlights the influence of polymer-micelle complex morphology on solubilization efficiency.
More Related Videos
Related Concept Videos
01:27Surface Active Agents
158
Surfactants, named for their behavior at interfaces, positively adsorb at the interfaces of two phases, reducing interfacial tension. Their versatility as emulsifiers, detergents, and foaming agents stems from this ability. Surfactants, often termed amphiphiles, share the property of amphipathy, with molecules having both hydrophilic and hydrophobic portions. The hydrophilic part is called the head, and the hydrophobic part, including an elongated alkyl substituent, forms the tail.Surfactants...
158
03:00Solubility
16.9K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
16.9K
01:30Micelles
364
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
364
02:05Entropy and Solvation
6.8K
The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
6.8K
03:22Colloids
17.2K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.2K
02:39Enthalpy of Solution
21.1K
There are two criteria that favor, but do not guarantee, the spontaneous formation of a solution:
21.1K