Recent Advances in Ultrasound-Assisted Synthesis of Nano-Emulsions and their Industrial Applications

Background: Colloidal systems are used in various industrial and medical applications. Nanoparticles have good physio-chemical properties that enhance the performance of the system. Nano-emulsions can be synthesized by ultrasonication. Ultrasonication is the simplest method as compared to other available methods. The purpose of this article is to review the recent advances in ultrasound- assisted nano-emulsion synthesis and challenges regarding the safety of the nano-emulsion. Methods: Application of the nano-emulsions in the various industrial and medical processes like drug delivery process, food industry, pesticide industry and cosmetics industry is also reviewed. Results: Ultrasound-assisted synthesis of nano-emulsions is a simple method as compared to other synthesis methods of the nano-emulsions. Nano-emulsions have potential applications in the cosmetic, drug delivery, pesticides and industry. Conclusion: Fabrication of the nano-emulsions is different for each application and product. Physiochemical properties should be strictly monitored in the nano-emulsions as they influence the efficiency of the nano-emulsions greatly. Ostwald ripening is the main phenomenon for the nano-emulsions mechanism.