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Contribution of two parallel sorption regimes (a-b) to attain an equilibrium moisture content (EMC) and (c-d) timescale involved in the process. (a,c) Correspond to EMC and timescale for the fast sorption regime. (b,d) Correspond to EMC and timescale for the slow sorption regime. Lines are drawn to guide the eye. (e) Photograph of a drop of water on flat films prepared from CNF (left) and TOCNF (right). The TOCNF film contains more moisture than CNF film, as indicated by (a-b).
