Comparison of Pickering emulsion stabilized by nanocellulose-protein composite particles through adsorption and grafting

As a biological material, cellulose with a low carbon footprint is better for preparing emulsions than traditional surfactant emulsions. However, the high hydrophilicity of nanocellulose is not conducive to its adsorption at the oil–water interface, resulting in a low emulsification capacity of Pick...

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Bibliographic Details
Published in:Cellulose (London) 2024-05, Vol.31 (8), p.5013-5025
Main Authors: Ke, Mengzhang, Wang, Yijie, Li, Ting, Jiang, Jie, Dong, Weifu
Format: Article
Language:English
Subjects:
Adsorption
Aldehydes
Biological materials
Bioorganic Chemistry
Bonding strength
Ceramics
Chemical bonds
Chemistry
Chemistry and Materials Science
Composites
Emulsification
Emulsions
Glass
Grafting
Hydrophilicity
Hydrophobicity
Natural Materials
Organic Chemistry
Original Research
Oxidation
Particulate composites
Physical Chemistry
Polymer Sciences
Proteins
Serum albumin
Sustainable Development
Wettability
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Summary:As a biological material, cellulose with a low carbon footprint is better for preparing emulsions than traditional surfactant emulsions. However, the high hydrophilicity of nanocellulose is not conducive to its adsorption at the oil–water interface, resulting in a low emulsification capacity of Pickering emulsion. This work applied 2,2,6,6-tetramethy1-1-piperidyloxy(TEMPO)-mediated oxidation and sodium periodate oxidation to prepare nanocellulose with carboxyl and aldehyde groups, and studied the effects of bonding forms on the hydrophilicity of bovine serum albumin (BSA)/nanocellulose composites. Compared with pure components, the composite products prepared by adsorbing or grafting had improved effects in the emulsification by increasing viscosity and reducing surface wettability. With adsorbed BSA, the composite showed a higher hydrophobicity, and the corresponding Pickering emulsion had an extended oil fraction of 60%. Due to the strong chemical bonding, the grafted composite can stabilize the Pickering emulsion of a 70% oil fraction with stable droplets of uniform size. This study provides an idea for improving the emulsification performance of nanocellulose through protein bonding. Graphical abstract
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-024-05897-7