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Orientador(es)
Resumo(s)
Microcapsules were developed using Arabic gum and gelatin A through complex coacervation, employing both
batch and continuous production methods. Ingredients were chosen to encapsulate diverse hydrophobic core
materials with functional properties tailored for cosmetic applications, such as those found in commercial hydrating
creams, aiming to enhance their performance through microencapsulation. The formulation was optimised
by systematically adjusting key parameters to balance the electrostatic and structural behaviour of the
polymers, ensuring ideal encapsulation conditions. The optimised batch formulation (3.5:1 vol-to-volume ratio of
core material to emulsifier, stirring at 9500 rpm for 2 min, and 10 % crosslinker concentration) resulted in
spherical, multinuclear microcapsules with an average size of circa 60 μm, maintaining structural stability over
45 days. Encapsulation efficiency, defined as the percentage of core material successfully enclosed within the
microcapsules relative to the initial amount used, reached up to 89 %. Transitioning to a continuous production
method using the NETmix reactor further improved performance, achieving an encapsulation efficiency of 98 %.
This was accomplished by performing the emulsification and polymer complexation steps under controlled
Reynolds numbers of approximately 358 and 559, sustained over 2 and 4 minutes, respectively.
Descrição
Palavras-chave
Encapsulation Complex coacervation Arabic gum+gelatine Batch mode optimisation Continuous mode scale-up NETmix
Contexto Educativo
Citação
Kessler, Júlia C.; Martins, Isabel M.; Manrique, Yaidelin A.; Lopes, José Carlos B.; Rodrigues, Alírio E.; Barreiro, M. F.; Dias, Madalena M. (2025). Optimised model microcapsules of Arabic gum and gelatin a for functional cosmetic applications: From formulation to scale-up using a mesostructured reactor. Chemical Engineering Research and Design. ISSN 0263-8762. 215, p. 108-121
Editora
Elsevier