Pickering oil-in-water emulsions stabilized by carboxylated cellulose nanocrystals – Effect of the pH

Mikulcová, Veronika; Bordes, Romain; Minařík, Antonín; Kašpárková, Věra

dc.title	Pickering oil-in-water emulsions stabilized by carboxylated cellulose nanocrystals – Effect of the pH	en
dc.contributor.author	Mikulcová, Veronika
dc.contributor.author	Bordes, Romain
dc.contributor.author	Minařík, Antonín
dc.contributor.author	Kašpárková, Věra
dc.relation.ispartof	Food Hydrocolloids
dc.identifier.issn	0268-005X Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued	2018
utb.relation.volume	80
dc.citation.spage	60
dc.citation.epage	67
dc.type	article
dc.language.iso	en
dc.publisher	Elsevier
dc.identifier.doi	10.1016/j.foodhyd.2018.01.034
dc.relation.uri	https://www.sciencedirect.com/science/article/pii/S0268005X17319252
dc.subject	Carboxylated cellulose nanocrystals	en
dc.subject	pH responsiveness	en
dc.subject	Pickering emulsions	en
dc.subject	Stability	en
dc.subject	Triglyceride oil	en
dc.description.abstract	Carboxylated cellulose nanocrystals (cCNC) were prepared by oxidation of microcrystalline cellulose with ammonium persulfate and characterized by AFM. Zeta potential was measured at different pH and ionic strength, in presence of mono- and divalent cations. With a length ranging from 50 to 450 nm and a thickness varying between 20 and 60 nm, the cCNC had a surface charge that appeared to be more sensitive to the presence of divalent cations and exhibited a strong pH dependence. The nanocrystals were capable of forming stable oil-in-water emulsions at three different pH of 2, 4 and 7 with a triglyceride oil. The size of emulsion droplets was dependent on oil and cCNC contents. Emulsification was, however, mainly influenced by the pH of the continuous phase, which can be related to reduction of charge on the cCNC surface with decreasing pH. Responsiveness of emulsions towards pH changes was not as dominant as expected, and lowering of pH did not trigger the release of oil from droplets. This can be explained by the strong adsorption of the cCNC, relatively polar triglyceride oil and the limited possibility to induce desorption of nanocrystals from oil surface. © 2018 Elsevier Ltd	en
utb.faculty	Faculty of Technology
utb.faculty	University Institute
dc.identifier.uri	http://hdl.handle.net/10563/1007813
utb.identifier.obdid	43878914
utb.identifier.scopus	2-s2.0-85044370149
utb.identifier.wok	000429959700008
utb.identifier.coden	FOHYE
utb.source	j-scopus
dc.date.accessioned	2018-04-23T15:01:46Z
dc.date.available	2018-04-23T15:01:46Z
dc.description.sponsorship	17-05095S, GACR, Grantová Agentura České Republiky; LO1504, MŠMT, Ministerstvo Školství, Mládeže a Tělovýchovy
dc.description.sponsorship	Czech Science Foundation [17-05095S]; Ministry of Education, Youth and Sports of the Czech Republic [LO1504]; TBU in Zlin [IGA/CPS/2017/001]
utb.ou	Centre of Polymer Systems
utb.contributor.internalauthor	Mikulcová, Veronika
utb.contributor.internalauthor	Bordes, Romain
utb.contributor.internalauthor	Minařík, Antonín
utb.contributor.internalauthor	Kašpárková, Věra
utb.fulltext.affiliation	Veronika Mikulcová a , Romain Bordes b, * , Antonín Minařík c, d , Věra kašpárková a, c, ** a Department of Fat, Surfactant and Cosmetics Technology, Faculty of Technology, Tomas Bata University in Zlín, nám. T. G. Masaryka 5555, 760 01 Zlín, Czech Republic b Chalmers University of Technology, Department of Chemical and Biological Engineering, SE-412 96 Göteborg, Sweden c Centre of Polymer Systems, Tomas Bata University in Zlin, nám. T. G. Masaryka 5555, 760 01 Zlin, Czech Republic d Department of Physics and Materials Engineering, Faculty of Technology, Tomas Bata University in Zlín, nám. T. G. Masaryka 5555, 760 01 Zlín, Czech Republic * Corresponding author. ** Corresponding author. Department of Fat, Surfactant and Cosmetics Technology, Faculty of Technology, Tomas Bata University in Zlín, nám. T. G. Masaryka 5555, 760 01 Zlín, Czech Republic. E-mail addresses: bordes@chalmers.se (R. Bordes), vkasparkova@ft.utb.cz (V. Kašpárková ).
utb.fulltext.dates	Available online 6 February 2018
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utb.fulltext.sponsorship	This work was supported by the Czech Science Foundation (17-05095S) and by the Ministry of Education, Youth and Sports of the Czech Republic (Program NPU I, LO1504). The support of internal grants of TBU in Zlín, IGA/CPS/2017/001 is also acknowledged. The authors thank Ms. Eliška Siudová for technical assistance.
utb.scopus.affiliation	Department of Fat, Surfactant and Cosmetics Technology, Faculty of Technology, Tomas Bata University in Zlín, nám. T. G. Masaryka 5555, Zlín, Czech Republic; Chalmers University of Technology, Department of Chemical and Biological Engineering, Göteborg, Sweden; Centre of Polymer Systems, Tomas Bata University in Zlin, nám. T. G. Masaryka 5555, Zlin, Czech Republic; Department of Physics and Materials Engineering, Faculty of Technology, Tomas Bata University in Zlín, nám. T. G. Masaryka 5555, Zlín, Czech Republic
utb.fulltext.projects	17-05095S
utb.fulltext.projects	LO1504
utb.fulltext.projects	IGA/CPS/2017/001