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  • Title: Stable Cellulose Nanofibril Microcapsules from Pickering Emulsion Templates.
    Author: Shi H, Hossain KMZ, Califano D, Callaghan C, Ekanem EE, Scott JL, Mattia D, Edler KJ.
    Journal: Langmuir; 2022 Mar 22; 38(11):3370-3379. PubMed ID: 35261240.
    Abstract:
    Electrostatic attractions are essential in any complex formation between the nanofibrils of the opposite charge for a specific application, such as microcapsule production. Here, we used cationized cellulose nanofibril (CCNF)-stabilized Pickering emulsions (PEs) as templates, and the electrostatic interactions were induced by adding oxidized cellulose nanofibrils (OCNFs) at the oil-water interface to form microcapsules (MCs). The oppositely charged cellulose nanofibrils enhanced the solidity of interfaces, allowing the encapsulation of Nile red (NR) in sunflower oil droplets. Microcapsules exhibited a low and controlled release of NR at room temperature. Furthermore, membrane emulsification was employed to scale up the preparation of microcapsules with sunflower oil (SFO) encapsulated by CCNF/OCNF complex networks.
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