NCC is the term frequently used for the cellulose nanocrystals or cellulose whiskers prepared from natural cellulose by acid hydrolysis. NCC is the enlightened crystal­line segments of elementary nanofibrils after the amorphous segments have been re­moved via the treatment with strong acids at eminent temperature. The nanocrystals formed from wood pulp are shorter and thinner than the MFC. NCCs have a high as­pect ratio (3-5 nm wide, 50-500 nm in length), are ~100% cellulose, and are highly crystalline (54-88%). Most likely, from the result of acid hydrolysis process, the end of the cellulose nanocrystals are narrowed due to which they are look like whiskers. This hierarchical structure of natural fibers, based on their elementary nanofibrilar components, leads to the unique strength and high-performance properties of differ­ent species of plants. The mechanical properties of cellulose can be characterized by its properties in both the ordered (so-called crystalline) and disordered (so-called amorphous) regions of the molecule. The chain molecules in the disordered regions contribute to the flexibility and the plasticity of the bulk material, while those in the ordered regions contribute to the elasticity of the material. As they are almost defects free, the modulus of cellulosic nanocrystals is close to the theoretical limit for cellulose. It is potentially stronger than steel and similar to Kevlar.6569