Akademik Veri Yönetim Sistemi
22TH INTERNATIONAL ISTANBUL SCIENTIFIC RESEARCH CONGRESS ON LIFE, ENGINEERING, ARCHITECTURE AND MATHEMATICAL SCIENCES |, İstanbul, Türkiye, 20 - 22 Ağustos 2025, (Tam Metin Bildiri)
Currently, waste management is a primary focus of scientific research. Recyclable and reusable organic waste that can be converted into application-oriented polymer reinforcement materials is being dumped extensively in landfills. To maximize the reuse of citrus processing waste generated in large quantities due to fruit juice production, this study demonstrates the results of a new renewable approach for the extraction of high value-added compounds found in orange biomass, particularly orange peels (OP). Orange (Citrus x sinensis) is the most processed fruit in the world. Processing waste is rich in soluble sugars, cellulose, hemicellulose, and pectin and is therefore suitable for conversion into cellulose nanocrystals (CNCs) for use in bionanocomposite films. Cellulose is a common biopolymer found in most biological wastes. Organic waste orange peel was used as a raw material in this research. The waste material was used to extract cellulose using optimum chemical conditions such as alkali treatment, acid hydrolysis, and bleaching and purification. In this study, cellulose was isolated by extraction from orange peel via alkaline treatment, followed by bleaching. The cellulose obtained from orange peel was characterized, and nanocrystalline cellulose was obtained. Fourier transform spectroscopy (FTIR) was applied to the cellulose to identify the functional groups it contained, and it was determined that non-cellulosic components were gradually removed. Thermogravimetric Analysis (TGA) analyses revealed that nanocrystalline cellulose had higher thermal stability than the orange peel raw material. Furthermore, Scanning Electron Microscopy (SEM) and particle size analysis results revealed that the crystalline cellulose obtained after pretreatment was nanosized. Subsequently, biodegradable blended films were prepared using 5% by mass of orange peel nanocrystalline cellulose with chitosan using the solution casting method. According to FTIR spectra, the shift in the characteristic absorption band observed in the spectra of chitosan orange peel nanocrystalline cellulose-doped (filled) films confirmed the development of new