Nanoprecipitation to Produce Hydrophobic Cellulose Nanospheres for Water-in-Oil Pickering Emulsions

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aut.relation.endpage6239
aut.relation.issue10
aut.relation.journalCellulose
aut.relation.startpage6225
aut.relation.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, JLY
dc.date.accessioned2024-11-12T00:23:10Z
dc.date.available2024-11-12T00:23:10Z
dc.date.issued2024-06-12
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. Graphical Abstract: (Figure presented.)
dc.identifier.citationCellulose, ISSN: 0969-0239 (Print); 1572-882X (Online), Springer Science and Business Media LLC, 31(10), 6225-6239. doi: 10.1007/s10570-024-05983-w
dc.identifier.doi10.1007/s10570-024-05983-w
dc.identifier.issn0969-0239
dc.identifier.issn1572-882X
dc.identifier.urihttp://hdl.handle.net/10292/18280
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.relation.urihttps://link.springer.com/article/10.1007/s10570-024-05983-w
dc.rightsOpen Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
dc.rights.accessrightsOpenAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject3403 Macromolecular and Materials Chemistry
dc.subject34 Chemical Sciences
dc.subject0303 Macromolecular and Materials Chemistry
dc.subject0912 Materials Engineering
dc.subjectPolymers
dc.subject3403 Macromolecular and materials chemistry
dc.subject4016 Materials engineering
dc.titleNanoprecipitation to Produce Hydrophobic Cellulose Nanospheres for Water-in-Oil Pickering Emulsions
dc.typeJournal Article
pubs.elements-id557395
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