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Updated: Jan 18, 2026
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Self-Nanoemulsification of Healthy Oils to Enhance the Solubility of Lipophilic Drugs
Published on: July 27, 2022
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Research Progress of Surfactant-Free Microemulsions: A Review
Yansong Wu1,2, Guiyang Liu1,2, Zhenpeng Zhang3
1Department of Civil Engineering, Architecture and Engineering, Northeast Petroleum University, Daqing, China.
Critical Reviews in Analytical Chemistry
|September 7, 2025
Summary
Surfactant-free microemulsions (SFME) offer a novel approach to microemulsion synthesis without traditional surfactants. These systems show promise in applications like oily sludge treatment, potentially replacing surfactant-based microemulsions.
Area of Science:
- Colloid and Surface Chemistry
- Materials Science
Background:
- Traditional microemulsions rely on surfactants (SBME), offering high efficiency in applications like oily sludge treatment.
- SBME have limitations that newer formulations aim to overcome.
Purpose of the Study:
- To review the latest advancements in surfactant-free microemulsions (SFME).
- To cover SFME's phase behavior, structure, properties, and applications, particularly in oilfields.
Main Methods:
- Review of recent scientific literature on SFME.
- Analysis of phase behavior, structural characteristics, and property data for SFME.
- Exploration of current and potential applications, including anhydrous systems.
Main Results:
- Surfactant-free microemulsions (SFME) can be synthesized using a three-phase system with two immiscible liquids and an amphiphilic solvent.
- SFME exhibit similar structures and properties to SBME but overcome some of their limitations.
- Anhydrous SFME systems have been developed, expanding their applicability.
Conclusions:
- SFME represent a significant development in microemulsion technology.
- SFME have the potential to replace SBME in various applications, including oily sludge treatment.
- Further research into SFME applications is ongoing and promising.
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