Alternative approach could reduce reliance on potentially toxic surfactants in pharmaceutical and food applications
An international research team led by the University of Sydney has found a way to formulate microemulsions without traditional surfactants, which are often toxic and hard to separate from end products. The findings have important implications for pharmaceutical applications and food additives.
Scientists at the University of Sydney have discovered a method to create microemulsions without using conventional surfactants, which are often toxic and challenging to remove from final products. Surfactants are molecules that help oil and water mix, creating small droplets that remain suspended for a time before separating. These microemulsions have various applications, including pharmaceuticals, food products, and nanomaterial manufacturing.
While surfactants are effective, they can also be costly, environmentally harmful, and sometimes toxic. The researchers focused on an ionic liquid called propylammonium nitrate (PAN), which is both oil- and water-like, compared to ethanolammonium nitrate (EtAN), a similar liquid that is polar but not amphiphilic. By blending PAN with water, they observed the formation of three distinct environments: a polar region filled with water and PAN, a nonpolar region dominated by hydrocarbon chains, and an interfacial region with PAN and the polar ends of octanol molecules.
This method allows for precise control over polar and nonpolar nanostructures, offering potential advantages in sustainable chemical synthesis, nanomaterial templating, and greener solvent alternatives.
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