Heteroaggregation effects on Pickering stabilization using oppositely charged cellulose nanocrystal and nanochitin
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Carbohydrate Polymers, Volume 299
Abstract
Pickering emulsions are stabilized using complexes of cellulose nanocrystals (CNC) and nanochitin (NCh). The colloidal behavior and heteroaggregation in aqueous media are studied in relation to complex formation and net charge. The complexes are remarkably effective in stabilizing oil-in-water Pickering emulsions under conditions of slightly net positive or negative charges, as determined by the CNC/NCh mass ratio. Close to charge neutrality (CNC/NCh ~5), large heteroaggregates form, resulting in unstable emulsions. By contrast, under net cationic conditions, interfacial arrest of the complexes leads to non-deformable emulsion droplets with high stability (no creaming for 9 months). At given CNC/NCh concentrations, emulsions with up to 50% oil fraction are produced. This study shows how to control emulsion properties beyond consideration of the typical formulation variables, for instance, through adjusting CNC/NCh ratio or charge stoichiometry. We highlight the possibilities that are available for emulsion stabilization by using a combination of polysaccharide nanoparticles.Description
| openaire: EC/H2020/788489/EU//BioELCell Funding Information: This work was supported by the Canada Excellence Research Chair Program ( CERC-2018-00006 ), the Canada Foundation for Innovation (Project 38623 ) and the European Research Council under the European Union's Horizon 2020 research and innovation program (ERC Advanced grant no. 788489 , “BioElCell”). This work was also part of the Academy of Finland's Flagship Program (Competence Center for Materials Bioeconomy, FinnCERES) under project no. 318890 and 318891. L.B. was supported by National Natural Science Foundation of China ( 32201483 ). L.B. and S.Q.H. were also supported by the Natural Science Foundation of Heilongjiang Province ( YQ2021C009 and YQ2021C008 ) and the China Postdoctoral Science Foundation ( 2021M700734 ). S.S.G. is thankful to the Overseas Study Program of Guangzhou Elite Project (JY201936) and Bin Zhao for help with SEM imaging. Publisher Copyright: © 2022 Elsevier Ltd
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Guo, S, Zhu, Y, Xu, W, Huan, S, Li, J, Song, T, Bai, L & Rojas, O J 2023, 'Heteroaggregation effects on Pickering stabilization using oppositely charged cellulose nanocrystal and nanochitin', Carbohydrate Polymers, vol. 299, 120154. https://doi.org/10.1016/j.carbpol.2022.120154