Nanoprecipitation to produce hydrophobic cellulose nanospheres for water-in-oil Pickering emulsions

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dc.citation.issue10
dc.citation.volume31
dc.contributor.authorTiban Anrango BA
dc.contributor.authorNaiya MM
dc.contributor.authorVan Dongen J
dc.contributor.authorMatich O
dc.contributor.authorWhitby CP
dc.contributor.authorChen JL-Y
dc.date.accessioned2024-07-29T21:16:32Z
dc.date.available2024-07-29T21:16:32Z
dc.date.issued2024-07
dc.description.abstractIn recent years, there has been growing interest in replacing petroleum-based water-in-oil (W/O) emulsifiers with sustainable and less toxic natural materials. Pickering emulsifiers are considered well-suited candidates due to their high interfacial activity and the ability to form emulsions with long-term stability. However, only sporadic examples of natural materials have been considered as inverse Pickering emulsifiers. This study describes the synthesis of a series of hydrophobic cellulose nanospheres by bulk modification with acyl groups of different chain lengths followed by nanoprecipitation, and their application as inverse emulsifiers. Modification with acyl groups of longer chain length (C16, C18) afforded lower degrees of substitution, but resulted in greater thermal stability than groups with shorter acyl chains (C12, C14). Formation of nanospheres with low aspect ratios and narrow size distributions required low initial cellulose concentrations (< 1% w/v), high volumetric ratios of antisolvent to solvent (> 10:1), and slow addition rates (< 20 mL/h). The modified cellulose nanospheres were able to reduce the interfacial tension between water and hexane from 45.8 mN/m to 31.1 mN/m, with an effect that increased with the number of carbons in the added acyl chains. The stearate-modified nanospheres exhibited superhydrophobic behavior, showing a contact angle of 156° ± 4° with water, and demonstrated emulsification performance comparable to the commonly used molecular surfactant sorbitan stearate. Our findings suggest that hydrophobically modified cellulose nanospheres have the potential to be a bio-derived alternative to traditional molecular W/O emulsifiers.
dc.description.confidentialfalse
dc.edition.editionJuly 2024
dc.format.pagination6225-6239
dc.identifier.citationTiban Anrango BA, Naiya MM, Van Dongen J, Matich O, Whitby CP, Chen JLY. (2024). Nanoprecipitation to produce hydrophobic cellulose nanospheres for water-in-oil Pickering emulsions. Cellulose. 31. 10. (pp. 6225-6239).
dc.identifier.doi10.1007/s10570-024-05983-w
dc.identifier.eissn1572-882X
dc.identifier.elements-typejournal-article
dc.identifier.issn0969-0239
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71140
dc.languageEnglish
dc.publisherSpringer Nature B V
dc.publisher.urihttps://link.springer.com/article/10.1007/s10570-024-05983-w
dc.relation.isPartOfCellulose
dc.rights(c) 2024 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectSpherical cellulose nanoparticles
dc.subjectInverse Pickering emulsion
dc.subjectNanoprecipitation
dc.subjectHydrophobically modifed cellulose
dc.subjectWater-in-oil emulsion
dc.titleNanoprecipitation to produce hydrophobic cellulose nanospheres for water-in-oil Pickering emulsions
dc.typeJournal article
pubs.elements-id489446
pubs.organisational-groupOther
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