Abstract

beta-chitin was isolated from marine waste, giant Humboldt squid Dosidicus gigas, and further converted to nanofibers by use of a collider machine under acidic conditions (pH 3). The FTIR, TGA, and NMR analysis confirmed the efficient extraction of beta-chitin. The SEM, TEM, and XRD characterization results verified that beta-chitin crystalline structure were maintained after mechanical treatment. The mean particle size of beta-chitin nanofibers was in the range between 10 and 15 nm, according to the TEM analysis. In addition, the beta-chitin nanofibers were converted into films by the simple solvent-casting and drying process at 60 degrees C. The obtained films had high lightness, which was evidenced by the CIELAB color test. Moreover, the films showed the medium swelling degree (250-290%) in aqueous solutions of different pH and good mechanical resistance in the range between 4 and 17 MPa, depending on film thickness. The results obtained in this work show that marine waste can be efficiently converted to biomaterial by use of mild extractive conditions and simple mechanical treatment, offering great potential for the future development of sustainable multifunctional materials for various industrial applications such as food packaging, agriculture, and/or wound dressing.