Cellulose nanocrystals from ultrasound process stabilizing O/W Pickering emulsion

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dc.creatorAureliano Agostinho Dias Meirelles
dc.creatorAna Letícia Rodrigues Costa Lelis
dc.creatorRosiane Lopes Cunha
dc.date.accessioned2022-04-08T22:33:05Z
dc.date.accessioned2025-09-08T22:49:44Z
dc.date.available2022-04-08T22:33:05Z
dc.date.issued2020-09
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipFAPESP - Fundação de Amparo à Pesquisa do Estado de São Paulo
dc.description.sponsorshipOutra Agência
dc.identifier.doi10.1016/j.ijbiomac.2020.04.185
dc.identifier.issn0141-8130
dc.identifier.urihttps://hdl.handle.net/1843/40942
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofInternational Journal of Biological Macromolecules
dc.rightsAcesso Aberto
dc.subjectNanocristais
dc.subjectCelulose
dc.subject.otherUltrasound process
dc.subject.otherFlaxseed oil
dc.subject.otherStability of emulsions
dc.subject.otherNanocrystals
dc.subject.otherCellulose
dc.titleCellulose nanocrystals from ultrasound process stabilizing O/W Pickering emulsion
dc.typeArtigo de periódico
local.citation.epage84
local.citation.spage75
local.citation.volume158
local.description.resumoCellulose nanocrystals (CNC) are bio-based solid particles arisen as promising stabilizers for Pickering emulsions in food, pharmaceutical and cosmetics industries. This study aimed to understand the stabilization mechanism of oil-in-water emulsion using CNC as stabilizing particles. CNC were obtained from cellulose microcrystalline after acid hydrolysis, dialysis, ultrasound treatment and vacuum filtration. Atomic force microscopy (AFM) showed needle-shaped CNC. The CNC presented good stability against agglomeration due to the high electrostatic repulsion between particles, making them feasible to be used in O/W emulsions. O/W emulsions were stabilized by CNC and prepared using rotor-stator and ultrasound as mechanical processes. Emulsions stabilized by CNC were opaque, homogeneous and kinetically stable during few days. Small droplets generated during the ultrasound process, could be covered by cellulose nanoparticles that acted as an effective mechanical barrier against droplets coalescence in a Pickering mechanism. The mechanism of droplets stabilization was associated with electrostatic and steric repulsion between droplets. Emulsions were evaluated varying the proportion between flaxseed oil and cellulose nanocrystals (CNC). Emulsions with a lower proportion of CNC showed better kinetic stability compared to emulsions with higher CNC proportion. After 7 days of storage, the viscosity of emulsions with a higher proportion of CNC particles decreased, which was associated to the emulsion destabilization. Our results improved the understanding of the relationship between the proportions of oil and particles for emulsion properties by evaluating the potential application of CNC as a food emulsifier.
local.publisher.countryBrasil
local.publisher.departmentFAR - DEPARTAMENTO DE ALIMENTOS
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0141813020330464

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