Cellulose is a macropolysaccharide composed of glucose . Insoluble in water and general organic solvents. It is the main component of plant cell walls . Cellulose is the most widely distributed and abundant polysaccharide in nature, accounting for more than 50% of the carbon content in the plant kingdom. The cellulose content of cotton is close to 100%, making it the purest natural source of cellulose. In general, cellulose accounts for 40-50% of wood, with 10-30% hemicellulose and 20-30% lignin .   Cellulose is the main structural component of plant cell walls and is usually combined with hemicellulose, pectin and lignin. The way and extent of its combination has a great impact on the texture of plant-derived foods. The changes in texture of plants during maturity and post-ripening are caused by changes in pectin substances. Cellulase does not exist in the human digestive tract, and cellulose is an important dietary fiber. It is the most widely distributed and abundant polysaccha...