Related Experiment Video
Updated: Jan 9, 2026
06:31
Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
Published on: March 18, 2020
6.8K
Efficient silicon-containing di-chain anionic surfactants for stabilizing oil-water interfaces in microemulsions
Adhip Rahman1, Julian Eastoe1, Ilona E Serafin1
1School of Chemistry, University of Bristol, Cantock's close, BS8 1TS, Bristol, UK. rahmanadhip92@gmail.com.
Soft Matter
|December 11, 2025
Summary
New silicon-containing surfactants effectively stabilize oil-water interfaces, forming ultra-low tension microemulsions. These trimethylsilyl (TMS) hedgehog surfactants offer eco-friendly alternatives to hazardous fluorinated surfactants.
Area of Science:
- Colloid and Surface Science
- Materials Chemistry
- Physical Chemistry
Background:
- Di-chain anionic surfactants with silicon (Si) atoms in hydrophobic chain-tips, known as trimethylsilyl (TMS) hedgehog surfactants, can significantly reduce air-water surface tension.
- The ability of these TMS surfactants to stabilize oil-water (O-W) interfaces, particularly in microemulsions, remained largely unexplored.
Purpose of the Study:
- To investigate the efficacy of TMS surfactants in stabilizing water-in-oil microemulsions (W/O-µEs).
- To determine the resulting oil-water interfacial tensions and explore factors influencing microemulsion stability.
- To compare the performance of TMS surfactants with traditional fluorinated surfactants.
Main Methods:
- Synthesis and application of TMS surfactants in oil-water systems.
- Measurement of oil-water interfacial tensions (γo/w).
- Optimization of microemulsion stability by varying surfactant and solvent structures.
- Contrast-variation small-angle neutron scattering (SANS) to characterize droplet structure and morphology.
Main Results:
- TMS surfactants successfully stabilize water-in-oil microemulsions (W/O-µEs) with ultra-low interfacial tensions (10-2 to 10-4 mN m-1).
- Microemulsion stability is dependent on the chemical structures of both the surfactant and the solvent (e.g., aliphatic vs. aromatic).
- SANS analysis confirmed that water droplets are stabilized by surfactant monolayers, with morphology linked to phase stability boundaries.
Conclusions:
- Silicon-containing TMS surfactants are highly effective at oil-water interfaces, achieving ultra-low tensions crucial for microemulsion stabilization.
- These novel surfactants provide a viable, environmentally conscious alternative to potentially harmful fluorinated surfactants.
- The study highlights the tunable nature of TMS surfactants for specific applications in microemulsion formulation.
Related Concept Videos
03:22Colloids
20.5K
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...
20.5K
01:20Anionic Chain-Growth Polymerization: Overview
2.5K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.5K
03:00Solubility
20.8K
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,...
20.8K