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Formation of pigment-loaded lipid particles using supercritical CO2

Aredo Tisnado, Victor Jesús

Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Faculdade de Zootecnia e Engenharia de Alimentos 2022-10-07

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  • Título:
    Formation of pigment-loaded lipid particles using supercritical CO2
  • Autor: Aredo Tisnado, Victor Jesús
  • Orientador: Oliveira, Alessandra Lopes de
  • Assuntos: Alimentos Em Polvo; Cera De Abelha; Curcumina; Micronização Supercrítica; Beeswax; Carbon Dioxide; Curcumin; Food Powders; Supercritical Micronisation
  • Notas: Tese (Doutorado)
  • Descrição: Lipid particles have been suggested to be efficient delivery vehicles for bioactive compounds. In this context, particle formation by supercritical CO2 technologies is promising because it generally does not use organic solvents and employs moderate temperatures. However, the practical application of these technologies in pigments of interest for food industry is limited, for example, by the few compatible carrier materials. This thesis aimed to study the formation of pigment-loaded lipid particles using supercritical CO2 technology. For which experimental phase focused on studying: the solubility of beeswax, Brazil nut oil and their mixture in supercritical CO2 at 60 °C and 150-300 bar to understand their use as carrier materials in supercritical CO2 technology; the formation of Brazil nut oil-loaded beeswax microparticles using Particles from Gas Saturated Solutions (PGSS) with supercritical CO2 at 60 °C and 150-300 bar to explore the technical feasibility of the process; the formation of turmeric extract-loaded structured lipid carriers using PGSS with supercritical CO2 at 60 °C and 300 bar, and mixtures of beeswax and Brazil nut oil as carrier material to propose it as an innovative ingredient for the food industry; the behaviour of hydrolysed collagen powder in supercritical CO2 at 40-60 °C and 100-250 bar for design of new carrier systems; the beeswax coating of blueberry extract-loaded hydrolysed collagen particles using supercritical CO2 at 60 °C and 300 bar and assessing formulations to suggest a new food ingredient. The solubility in supercritical CO2 of lipid materials increased when pressure increased (R2>0.90, p<<0.05). Brazil nut oil-loaded beeswax microparticles were effectively formed by PGSS process and it was observed that its size and bulk density were affected inversely by CO2 pressure. Mixtures of beeswax and Brazil nut oil, maintaining a solid/liquid material ratio of 1:1 (w/w) in the formulation, are useful carriers to uniform loading of turmeric extract. This turmeric extract-loaded structured lipid carriers were yellow, free-flowing and sponge-like powders. Hydrolysed collagen powder has low interaction with supercritical CO2 since it has constant solubility (0.5-0.6 g/kg CO2) and does not expand volumetrically, which makes interesting for impregnation applications. The blueberry extract-loaded hydrolysed collagen particles coated with beeswax formulated with 6.33% of beeswax, 10.67% of blueberry extract and 83% of hydrolysed collagen is recommended because it had high total anthocyanin content (0.42 mg cyanidin-3-glucoside /g), high colour variation (29.8), and reduced degree of solubilisation in water (72.9%). The results of this thesis demonstrated that the formation of pigment-loaded lipid particles using supercritical CO2 is technically feasible. Both turmeric extract-loaded structured lipid carriers and blueberry extract-loaded hydrolysed collagen particles are products with potential technological application as an antioxidant pigment. In addition, these results can serve as a reference for the formation of particles loaded with other bioactive substances by means of supercritical CO2 technology that will be applied as an ingredient in the enrichment/formulation of traditional and innovative food products.
  • DOI: 10.11606/T.74.2022.tde-25042023-142927
  • Editor: Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Faculdade de Zootecnia e Engenharia de Alimentos
  • Data de criação/publicação: 2022-10-07
  • Formato: Adobe PDF
  • Idioma: Inglês
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