Grinding, Sieve Shacking and Evolving a Material From Shells of Crabs used for Light Weight Bio Medical Applications

The external skeletons of crabs contain chitin fibers in excess quantity. The chitin powder can be manufactured by mechanical treatment with several purification processes. Chitin powders are manufactured by grinders and high pressure water jet systems. The acidic treatment is done to facilitate mechanical fibrillation. Surface modification is done to mechanical fibrillation. The surface modification is done to change the surface property. Acetylation, deacetylation phthaloylation, naphthaloylation meleylation, chlorination, tempo-medicated oxidation and graft polymerization is the step by step procedure to purify the exoskeleton of the crabs shell. After grinding the crab powder is used to manufacture functionally graded material.