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. Author manuscript; available in PMC: 2020 Jan 28.
Published in final edited form as: J Control Release. 2018 Nov 27;294:53–76. doi: 10.1016/j.jconrel.2018.11.024

Figure 10.

Figure 10.

Cellulose nanofibril capsules. (a) Fabrication of CNF microcapsules from colloidal CNF dispersions using sacrificial calcium carbonate cores undergoing the layer-by-layer (LbL) assembly of CNF, XyG, CNF, and AP [187]. (b) The cross section of capsules [188], indicating a calcium carbonate core (red arrow) coated with the multilayer CNF nanocomposite (white arrows). (c) Capsule pores change size as a response to ionic strength variation, providing a stimuli-responsive cargo carrier platform with tailored loading (in water)/trapping (in salt)/release (in water) capacities [187]. (d) Mechanically-stable liquid-core capsules [205] made up of a covalently crosslinked CNF/CNC shell with an inner aromatic polyurea layer. These capsules are about six times stiffer than aromatic polyurea capsules. Images of panels (a) and (c) are reprinted from [187], copyright (2018), with permission from Elsevier. Panel (b) is reprinted with permission from [188]. Copyright (2017) American Chemical Society. Panel (d) is reprinted with permission from [205]. Copyright (2014) American Chemical Society.