Cellulose nanofibril (CNF)-based biomaterials, including hydrogels, aerogels, capsules, films, and inorganic nanocomposites for cargo delivery. Images of hydrogel, capsules, aerogel, composite films, and inorganic nanocomposites are reprinted from [193], [188], [194], [195], and [185] with permissions from The Royal Society of Chemistry, Copyright (2017) American Chemical Society, Copyright (2015) American Chemical Society, Copyright (2017) American Chemical Society, and Elsevier, respectively.