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Oil-in-water emulsions stabilized by sodium alginate microgels

  • Yuehan Wu ORCID logo , Meng Hu , Fangfang Chen , Chao Zhang , Zhiming Gao EMAIL logo , Longquan Xu and Shaohua Cui
Published/Copyright: July 21, 2021

Abstract

In this research, sodium alginate (ALG) microgels were prepared with different ALG concentrations, and physicochemical and emulsifying profiles of these hydrophilic microgels were comparatively analyzed. Results showed that these microgels possessed different size, hardness, and surface charge. All these microgels could stabilize an oil-in-water emulsion through the Mickering mechanisms, and smaller microgels had better emulsifying capacity. The surface hydrophobicity and interfacial tension of the microgels had no exact effects on their emulsifying behaviors. Compared with the harder microgels (prepared with high ALG concentration, e. g. 4 mg/mL), the emulsifying capacities of the softer ones (prepared with low ALG concentration, e.g. 1 mg/mL) were more sensitive to the high salt concentration (200 mM NaCl) but stable under acidic environment (pH 2.0). Our research would afford a new strategy for the manufacture and application of the novel polysaccharide-based emulsifiers.


Corresponding author: Zhiming Gao, Glyn O. Phillips Hydrocolloid Research Centre, School of Food and Biological Engineering, Hubei University of Technology, Nanli Road, Wuhan 430068, P. R. China, E-mail:
Yuehan Wu and Meng Hu are contributed equally to this work.

Funding source: China Tobacco Guizhou Industrial 10.13039/501100008921

Award Identifier / Grant number: GZZY/KJ/JS/2017BY009-1

Funding source: National Natural Science Foundation of China 10.13039/501100001809

Award Identifier / Grant number: 31972033

Funding source: Projects from Hubei Provincial Department of Science and Technology

Award Identifier / Grant number: 2017CFB600

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: The research was supported by the National Natural Science Foundation of China (Grants 31972033), Projects from Hubei Provincial Department of Science and Technology (2017CFB600), and China Tobacco Guizhou Industrial Co., Ltd. (GZZY/KJ/JS/2017BY009-1).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-04-27
Accepted: 2021-07-07
Published Online: 2021-07-21

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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