Keratin is a natural biopolymer that has attracted much attention in recent decades due to its disulfide cross-links, hydrophobic interactions associated with negative electric charge, and the presence of hydrogen bonds in its strong mechanical structure. As the main waste produced from poultry farms and slaughterhouses, they are produced in large quantities daily. They have a high keratin protein content and are considered one of the most abundant sources of this protein. Over the past century, this protein has led to the introduction of nanotechnology and the production of keratin-based biomaterials. In the present study, keratin nanoparticles were synthesized from chicken feathers. The structure and morphological properties of keratin and keratin nanoparticles were investigated using FESEM, FTIR, XRD, and Biuret test characterizations. X-ray diffraction pattern showed a crystalline peak at 37.5 and 20 ° C, indicating keratin and keratin nanoparticles, respectively. The crystal size of keratin nanoparticles was 75.6 nm. The presence of amides I, II, and III was also confirmed in the FTIR analysis. This study aimed to synthesize keratin nanoparticles from chicken waste, obtained by using glutaraldehyde as a cross-linking agent. Keratin nanoparticles have physical and chemical properties. They are unique and can provide new directions of application in medical and other fields.

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