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dc.creatorSouza, Lucas Oliveira-
dc.creatorLessa, Ozana Almeida-
dc.creatorDias, Matheus Cordazzo-
dc.creatorTonoli, Gustavo Henrique Denzin-
dc.creatorRezende, Denilde Vilas Bôas-
dc.creatorMartins, Maria Alice-
dc.creatorNeves, Isabelle Cristina Oliveira-
dc.creatorResende, Jaime Vilela de-
dc.creatorCarvalho, Elisângela Elena Nunes-
dc.creatorVilas Boas, Eduardo Valério de Barros-
dc.creatorOliveira, Julieta Rangel de-
dc.creatorFranco, Marcelo-
dc.date.accessioned2020-04-07T18:06:40Z-
dc.date.available2020-04-07T18:06:40Z-
dc.date.issued2019-06-
dc.identifier.citationSOUZA, L. O. et al. Study of morphological properties and rheological parameters of cellulose nanofibrils of cocoa shell (Theobroma cacao L.). Carbohydrate Polymers, [S.l.], v. 214, p. 152-158, June 2019.pt_BR
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S0144861719303005pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/39868-
dc.description.abstractCocoa shell was evaluated as a precursor for cellulose nanofibrils (NFCs) using mechanical defibrillation. Its morphology was analysed using optical microscopy and scanning electron microscopy with field emission. Rheological and mechanical behaviour were evaluated through flow curves with a strain rate ranging from 0 to 300 s−1 at 25 °C and by means of oscillatory frequency sweeps (0.01 Hz–10 Hz) and shear stress (3 Pa). The thermal-mechanical behaviour was determined by a temperature sweep with a heating rate of 3 °C min−1 and a temperature range of 25 °C–100 °C. Micrographs identified the presence of protoxilem with a mean diameter of 23.34 nm. The flow curve showed the characteristic behaviour of a pseudoplastic fluid. The storage module (G′) and the loss modulus (G″) were dependent on the frequency applied, indicating that the material exhibits a weak gel characteristic. The viscoelastic characteristics were influenced by temperature. Therefore, cocoa shell is a new alternative in the production of nanocellulose.pt_BR
dc.languageen_USpt_BR
dc.publisherElsevierpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceCarbohydrate Polymerspt_BR
dc.subjectWastept_BR
dc.subjectDefibrillationpt_BR
dc.subjectMicrographspt_BR
dc.subjectCellulose nanofibrilspt_BR
dc.titleStudy of morphological properties and rheological parameters of cellulose nanofibrils of cocoa shell (Theobroma cacao L.)pt_BR
dc.typeArtigopt_BR
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