A comprehensive study of physical, antimicrobial and emulsifying properties of self-assembled chitosan/lecithin complexes produced in aqueous media

Autor(es)

de Toledo, Antonio Matias Navarrete ; Silva, Nathalia Cristina Cirone ; Sato, Ana Carla Kawazoe ; Picone, Carolina Siqueira Franco

• Tipo de documento: Artigo Científico
• Fonte: FUTURE FOODS; v. 4, p. 7-pg., 2021-12-01.

Resumo

Demand for products containing natural compounds has grown in recent decades and synthetic emulsifiers prob-ably will be replaced. Lecithin is a natural emulsifier, but it has low emulsifying capacity for stabilizing oil-in water emulsions and does not show antimicrobial property. Thus, we proposed the development of surfactant-polyelectrolyte complexes (SPECs) based on lecithin (Lip) and chitosan (Chi) in order to provide antimicrobial properties and to enhance the emulsifying properties of lecithin. The physicochemical properties of SPECs were depending on the mass ratios between compounds. SPECs showed sizes ranging from 1.5 to 5.5 microns and Zeta potential values ranging from - 49.5 mV to + 38.5 mV. All SPECs showed surfactant properties reducing superficial tension and interfacial tension with sunflower oil. SPECs with positive Zeta potentials values and at concentration of 2.5 mg/mL were able to inhibit the Escherichia coli growth. Through droplet size measure-ments, may be observed that emulsions prepared with SPECs showed coalescence decreasing when compared with those prepared only with lecithin or chitosan. These results showed that SPECs can be modulated in their physicochemical properties to be potential emulsifiers with antimicrobial properties. (AU)

• Processo FAPESP: 07/58017-5 - Micro e nano emulsoes alimenticias: estudo reo-optico e de estabilidade.
• Beneficiário: Rosiane Lopes da Cunha
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/26359-0 - Desenvolvimento de nanopartículas biopoliméricas com função antimicrobiana
• Beneficiário: Carolina Siqueira Franco Picone
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/11984-7 - Produção de micropartículas contendo ativos lipossolúveis através da secagem por atomização em spray drying: influência das propriedades das emulsões nas características do produto final
• Beneficiário: Miriam Dupas Hubinger
• Modalidade de apoio: Auxílio à Pesquisa - Regular