
In nature, cellulose is found as β-1,4-linked glucopyranose units. The polymer chains are linked via hydrogen bonds forming fibril bundles of both highly ordered crystalline regions and disordered amorphous regions in the plant cell wall.1 Cellulose fibrils are responsible for the high tensile strengths in the cell wall of plant fibers. These fibrils or fibril bundles are obtained from wood and other lignocellulosic fiber materials.2