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Published on: May 26, 2016
Comparative study of holo-cellulose nanofibers for citral-encapsulated Pickering emulsions: Structure-property
Yayue Wang1, Qiaoyangzi Lei1, Shuai Zhang1
1College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
Abstract:
Citral's instability limits its use as a natural antimicrobial. This study compared enzyme-hydrolyzed (E-CNF) and peracetic acid-oxidized (P-CNF) holocellulose nanofibers for stabilizing citral-loaded Pickering emulsions. P-CNF achieved 5.3× higher yield than E-CNF while retaining hemicellulose, enhancing wettability and interfacial adsorption. Emulsions stabilized with 0.35-0.45 % P-CNF showed optimal stability, forming droplets averaging 9.32 μm with a zeta potential of -40.87 mV. Cryo-SEM revealed dense interfacial layers and a 3D network. Rheology indicated P-CNF's flexible networks prevented coalescence better than E-CNF's rigid interfaces. P-CNF emulsions exhibited 16.79 % and 18.36 % higher antibacterial inhibition against S. aureus and E. coli, respectively, confirming delayed citral release. Peracetic acid oxidation provides a high-yield, streamlined route for functional CNF emulsifiers.
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