holding, protection against biochemical stress or addition of strength and structure; and hemicellulose, which coordinates cellulose together with lignin (Boerjan et al. 2003; Hansen and Björkman 1998; Panshin and De Zeeuw 1980). Cellulose, as the main constituent of plant cell walls, provides the structural support. It consists of b-D-glucopyranose sugar units, which contain three hydroxyl groups at the C-2, C-3 and C-6 positions. They can form strong hydrogen bonds, constituting the crystalline and amorphous regions within the fibers, which interact with each other to form cellulose microfibrils. Cellulose is known to exist in different polymorphs depending on the molecular orientation and hydrogen-bonding network in crystalline domains. The four main polymorphs of cellulose are cellulose I, cellulose II, cellulose III and cellulose IV. The most extensively investigated are cellulose I, which is the dominant form in natural wood and plants, and cellulose II that can be obtained from cellulose I either by chemical regeneration or mercerization, due to its relatively low thermal stability. Cellulose I, present in native cellulose, exists as cellulose Ia (triclinic unit cell) and cellulose Ib (monoclinic unit cell), both with cellulose chains adopting parallel configurations. In contrast, the chains of cellulose II are in an antiparallel configuration and exist in a monoclinic unit cell (Gong et al. 2017). Despite cellulose I exhibits much better mechanical properties than cellulose II (O'Sullivan 1997; Yu et al. 2014), the later has a more stable structure, making it preferable for various applications. Cellulose can be submitted to a wide variety of chemical modifications due to the three hydroxyl groups present in its structure. Furthermore, reactivity of cellulose can be enhanced through previous Keywords Cellulose Á Jute fibers Á Ball milling Á Isocyanate