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Exemplary models of hydrogen bonds in cellulose fibers: (a) intramolecular hydrogen bonding, (b) intra- and intermolecular hydrogen bonding, (c) cellulose-water hydrogen bonding possibilities with the description of oxygen and carbon atoms numbering (d). Intramolecular hydrogen bonds: 3OH⋯O5 and 2OH⋯O6. Intermolecular hydrogen bonds: 6OH⋯O3′.
