Attainment of O/W emulsions containing liquid crystal from annatto oil (Bixa orellana), coffee oil, and tea tree oil (Melaleuca alternifolia) as oily phase using HLB system and ternary phase diagram.
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Date
2008
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Abstract
Emulsions containing liquid crystals present interesting properties and advantages such as the
skin moisturize increase, active release modulation, and emulsion stabilization. In this work, emulsions
containing annatto, coffee and tea tree oils, and nonionic surfactants were developed. The
HLB method was used for selection of surfactants. The required HLB value was established
(9.0). Liquid crystals were attained when used the surfactant mixture Ceteareth-5 and
Steareth-2 and identified as lamellar. The emulsions showed pseudoplastic behavior and tixotropy.
The ternary diagram was useful in the selection of the proportion of surfactant and oily phase considering
skin compatibility and liquid crystal presence.
Description
Keywords
Vegetable oils, Rheology
Citation
MORAIS, G. G. et al. Attainment of O/W emulsions containing liquid crystal from annatto oil (Bixa orellana), coffee oil, and tea tree oil (Melaleuca alternifolia) as oily phase using HLB system and ternary phase diagram. Journal of Dispersion Science and Technology, v. 29, p. 297-306, 2008. Disponível em: <http://www.tandfonline.com/doi/abs/10.1080/01932690701688581>. Acesso em: 10 jan. 2017.