Open AccessStable Cellulose Nanofibril Microcapsules from Pickering Emulsion Templates
Author(s) -
Hui Shi,
Kazi M. Zakir Hossain,
Davide Califano,
Ciarán Callaghan,
Ekanem E. Ekanem,
Janet L. Scott,
Davide Mattia,
Karen J. Edler
Publication year - 2022
Publication title -
langmuir
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.042
H-Index - 333
eISSN - 1520-5827
pISSN - 0743-7463
DOI - 10.1021/acs.langmuir.1c03025
Subject(s) - pickering emulsion , template , cellulose , emulsion , chemical engineering , materials science , chitin , sunflower oil , polymer chemistry , chemistry , nanotechnology , chitosan , biochemistry , engineering
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.