Microcrystalline cellulose (MCC) is the product of natural cellulose hydrolysis to the limit polymerization degree by acid, its color is white or nearly white, odorless, tasteless, particle size is generally about 2 80 m, with the advantages of low density, high modulus, renewable, degradable, and extensive, and can be used as a reinforcing agent of composite materials to improve the performance of materials.
Microcrystalline cellulose is prepared by hydrolysis of plant cellulose, and the cellulose component of people's daily intake is the same, which is relatively non-toxic and non-irritatingIt is insoluble in water, dilute acid, not absorbed orally, and has no biological activity. The general process is as follows: hydrolysis of -cellulose in dilute inorganic acid solution, wherein -cellulose can be prepared from the fiber pulp of cellulose-containing plants, and the hydrolyzed cellulose is filtered and purified, and the water slurry is spray dried to form porous particles with wide particle size distribution.
Microcrystalline cellulose generally has a lower density in lyophilized and higher in spray drying. The moisture content is about 5. Microcrystalline cellulose is dispersible but insoluble in water, insoluble in dilute acids, organic solvents and oils, swollen in dilute alkali solution, partially soluble. Disperse the microcrystalline cellulose powder in water to obtain a white transparent gel or paste, which is still stable for many years except for extremely dilute ones.