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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

roperties of Cellulose Nanofibers Extracted from Eucalyptus and their Emulsifying Role in the Oil-in-Water Pickering Emulsion

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Author(s):
Martins, Lilian S. [1] ; dos Santos, Ronaldo Goncalves [2] ; Silva Spinace, Marcia A. [1]
Total Authors: 3
Affiliation:
[1] Fed Univ ABC, Ctr Nat & Human Sci, Av Estados 5001, BR-09210170 Santo Andre, SP - Brazil
[2] Ctr Univ FEI, Dept Chem Engn, Rua Humberto de Alencar Castelo Branco, SP 3592, BR-09771220 Sao Bernardo Do Campo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: WASTE AND BIOMASS VALORIZATION; v. 13, n. 1, SI, p. 689-705, JAN 2022.
Web of Science Citations: 0
Abstract

In this work, nanocellulose particles were obtained from eucalyptus fibers by high-pressure homogenization (CNF) and by high-intensity ultrasound (SCNF). The nanocellulose was applied as a solid emulsifier for soybean oil in water (O/W) emulsions. The adding of 0.25-1 wt.% of both CNF and SCNF produced stable O/W emulsions without conventional surfactants. SCNF emulsions showed the highest stability and displayed the narrowest size distribution. Zeta potential values (- 40 to - 70 mV) indicated an electrical barrier to the droplet coalescence. The rheological behavior of O/W emulsions stabilized with CNF and SCNF was described by the Herschel-Buckley model. O/W emulsions produced with nanocellulose particles behave as shear thinning fluid, and their behavior index ranged from 0.33 to 0.68. Both CNF and SCNF emulsions displayed maximum yield stress at a particle concentration of 0.5 wt.% and 0.75 wt.%, respectively. Besides, the prepared O/W emulsions using 0.5 to 1.00 wt.% CNF or SCNF did not showed phase separation until 30 days of rest. The data point out to the feasibility of using nanocellulose as a natural emulsifier, which can replace conventional surfactants. (AU)

FAPESP's process: 11/00156-5 - Coupling agent effect on the environment properties of polymeric composites with lignocellulosic fibers
Grantee:Márcia Aparecida da Silva Spinacé
Support Opportunities: Regular Research Grants
FAPESP's process: 10/17804-7 - Polymeric composites
Grantee:Maria Isabel Felisberti
Support Opportunities: Research Projects - Thematic Grants