Journal
CARBOHYDRATE POLYMERS
Volume 297, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2022.119904
Keywords
Bacterial cellulose; Electrostatic interaction; Depletion stabilization; Adsorption behaviors; Emulsion
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Funding
- Key Projects in the Hainan provin- cial Science & Technology Program [ZDYF2020186]
- National Nat- ural Science Foundation of China [22068011]
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In this study, the stability of emulsions was successfully controlled by preparing bacterial cellulose/carboxymethyl chitosan complexes. At pH 9.6, the complexes induced a long-range depletion-stabilization effect and effectively stabilized the emulsions.
The regulation of the magnitude of the depletion effect is necessary for accurately predicting and explaining the emulsion stabilization mechanism. Herein, the bacterial cellulose/carboxymethyl chitosan (BC/CCS) complexes with tunable assembled behaviors were prepared and designed via electrostatic interaction. Specially, the emulsions stabilized by BC/CCS complexes exhibited excellent stability as compared with that stabilized by BC polymers alone. At pH 9.6, BC/CCS complexes in the continuous phase induced long-range depletion -stabiliza-tion effect to stabilize emulsions. Additionally, the magnitude of depletion effect of BC/CCS complexes could be improved by increasing BC concentration, and effectively stabilized emulsions. Furthermore, with the decrease to pH 7.0, the interfacial adsorption layers at the oil-water interface prevented oil droplets from agglomerating, but did not show better emulsion stability. These results clarified that the magnitude of the depletion effect could be controlled by altering BC-based complexes particles, which would be useful for the applications of emulsions in numerous fields.
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