Utilização do Óleo das Vísceras da Tilápia do Nilo (Oreochromis niloticus) na geração de bioprodutos de valor agregado.

• Ano de defesa: 2021
• Autor(a) principal: Valle, Camila Peixoto do
• Orientador(a): Ricardo, Nágila Maria Pontes Silva
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Óleo da Tilápia; Biolubrificantes; Nanoemulsões.; Curcuminóides.; Aplicação cabelo e pele
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/58654

Environmental issues have increased interest in sustainable processes capable of converting biomass into value-added products. In this context, the present work aimed to use the oil from the Tilapia viscera in the production, characterization and use of this feedstock as a biolubricant and as a lipid matrix for carrying bioactive substances intended for skin and hair treatment. Regarding biolubricants, these were obtained from esterification reaction of fatty acids present in hydrolyzed Tilapia oil with different alcohols (trimethylolpropane, 1,2-propanediol and 2-ethylhexanol). All the synthesized products had yields higher than 85%, their structural modifications were accompanied by NMR (1H and 13C) and FTIR, in addition to physical-chemical properties compared to other commercial products. The biolubricant from esterification with trimethylolpropane alcohol (TMP-P) showed better values for the viscosity index (196.7) and thermo-oxidative stability (> 250 ºC), presenting viscosity compatible for applications such as industrial fluid (ISO VG 46 ) and automotive gear fluid (SAE 30). About using Tilapia oil as a carrier matrix, a total of 18 formulations varying the mixing ratio and the content of surfactants (Span® 80 and Tween® 80), and the oil phase were studied. Three best formulations (N3, N9 and N15) were used in the process of encapsulation of curcuminoids due to their smaller particle size and greater stability. Nanoemulsions with curcuminoids (NC3, NC9 and NC15) were obtained by ultrasonication technique. They showed values for encapsulation efficiency greater than 99.0%, fungicidal activity against fungi of the genus Candida and physicochemical properties such as: average particle size (˂ 300 nm), polydispersion index (˂ 0,230), zeta potential (≥ -40.0 mV) and pH (~ 5.8) optimal for potential topical use. The pig's skin penetration test for nanoemulsions containing curcuminoids (NC 09 and NC 15) revealed oil as an excellent vehicle for carrying compounds to more internalized layers of the skin. Nanoemulsions based on the saturated content of Tilapia oil, when formulated in a capillary mask, have demonstrated effectiveness as a cuticle sealing agent and hair restorer damaged by bleaching action. The use of Tilapia oil in applications such as those proposed in this work adds value to the by-product of high national production and reduces the environmental impacts related to the improper destination of solid waste (viscera).