EMULSIONS CONTAINING ESSENTIAL OILS AND THEIR MAIN USES: A REVIEW.

EMULSIONS CONTAINING ESSENTIAL OILS AND THEIR MAIN USES: A REVIEW.

• Autor
• Éder Ramin de Oliveira
• Co-autores
• Derval dos Santos Rosa
• Resumo

• Abstract

   Surface-active agents are molecules with both polar and nonpolar portions that act as surface tension reducers between a liquid and air, a liquid and a solid, or between two liquids. In the last case, when combining two immiscible liquids, surfactants can reduce interfacial tension, generating emulsions of water-in-oil (W/O), oil-in-water (O/W), or multiple emulsions^1,2. Efficient use of surfactants requires classification by their hydrophilic portion in relation to ionic character, the hydrophilic-lipophilic balance (HLB) between polar and nonpolar portions, and by the behavior of ionic and non-ionic surfactants in response to system changes^2–5. These changes can include the addition of a solute to one phase of an emulsified system or temperature variations, together with the surfactant concentration in emulsified systems, which can generate different structures besides simple micelles, such as lamellar, hexagonal, and liquid-crystalline forms^2,5,6. The organization of these structures can alter the viscosity, optical characteristics, and release patterns of the emulsified phases^7–10. Therefore, this review aimed to relate the properties of different surfactants to their use in stabilizing emulsified systems containing essential oils, and to link these properties to the applications of emulsions in bench-scale and industrial models discussed in the literature.

   

  References

   

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• Palavras-chave
• Surfactants, Essential Oil, Emulsions.
• Modalidade
• Pôster
• Área Temática
• Materiais Avançados