Cardamom Pickering emulsions stabilized by cellulose nanostructures as disinfection agents against bacteria and SARS-CoV-2

Autor(es)

Souza, Alana ; Kato, Mauricio ; Ferreira, Rafaela Reis ; Yudice, Eliana ; Campos, Ivana ; Setz, Luiz ; Rangari, Vijaya ; Rosa, Derval

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MOLECULAR LIQUIDS; v. 413, p. 9-pg., 2024-09-09.

Resumo

This study introduces a new disinfectant agent utilizing cardamom essential oil stabilized by cellulose nanomaterials (CN). The Pickering emulsion technique prevented oil degradation and extended its storage duration. Cellulose nanocrystals (CNC) or cellulose nanofibers (CNF) were utilized as stabilizers, and the emulsions were evaluated for surface tension, rheology, morphology, antimicrobial and antiviral activity against S. enterica, S. aureus, P. aeruginosa, E. coli, and SARS-CoV-2. Surface tension measurements indicated an electrostatic stabilization mechanism in CNC emulsions, exhibiting fluid behavior confirmed by rheological tests. On the other hand, CNF emulsions displayed drop packaging, characteristic of shear-thinning behavior, as confirmed by the Ostwald-de-Waele model. The emulsions exhibited antibacterial activity against S. aureus and P. aeruginosa, particularly the CNC samples, suggesting that nanocellulose alters the regulation of oil migration into the medium. Testing against SARS-CoV-2 revealed that cardamom essential oil required 30 min of contact for viral protein denaturation, while CNC and CNF emulsions took 60 and 50 min, respectively. This indicates that CN acts as an encapsulating agent, prolonging the oil's release time and necessitating longer contact periods with the virus. These findings demonstrate the potential of these emulsions in developing new antimicrobial and antiviral products. (AU)

• Processo FAPESP: 20/13703-3 - Materiais porosos ecológicos para a recuperação e reavaliação de metais recuperados de água contaminada
• Beneficiário: Derval dos Santos Rosa
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 15/16859-6 - Avaliação reológica de biomateriais cerâmicos.
• Beneficiário: Luiz Fernando Grespan Setz
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 21/14714-1 - EMU concedido no processo 2020/13703-3 (projeto temático): Cromatógrafo de Íons Modular 940 Professional IC Vario
• Beneficiário: Derval dos Santos Rosa
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 22/01382-3 - Hidrogéis de celulose contendo argilas modificadas para remoção e recuperação de íons metálicos presentes em águas contaminadas
• Beneficiário: Rafaela Reis Ferreira
• Modalidade de apoio: Bolsas no Brasil - Doutorado