Investigation of thermal oxidative stabilization process of viscose rayon fibers by multi-step heat treatment technique Çok adımlı ısıl işlem tekniğiyle viskoz rayon liflerin termal oksidatif stabilizasyon sürecinin incelenmesi
Journal of the Faculty of Engineering and Architecture of Gazi University, cilt.41, sa.2, ss.1091-1102, 2026 (SCI-Expanded, Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 41 Sayı: 2
- Basım Tarihi: 2026
- Doi Numarası: 10.17341/gazimmfd.1696408
- Dergi Adı: Journal of the Faculty of Engineering and Architecture of Gazi University
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Art Source, Compendex, TR DİZİN (ULAKBİM), Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Sayfa Sayıları: ss.1091-1102
- Anahtar Kelimeler: activated carbon, ammonium sulfamate, multi-step heat treatment, thermal oxidative stabilization, Viscose rayon
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Erciyes Üniversitesi Adresli: Evet
Özet
This study investigates the thermal oxidative stabilization (TOS) process of viscose rayon fibers. Before stabilization, a chemical pretreatment containing ammonium sulfamate and urea was applied to the fibers, and then stabilization was carried out at temperatures between 200°C - 250°C for different times with a multi-step heat treatment strategy. The effects of the TOS process on fiber density, tensile strength, FT-IR spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were evaluated in detail. The results show that as the TOS time increased, the density increased to 1.73g/cm³ and the carbonization efficiency increased from 15 to 64, but the tensile strength decreased by 60. FT-IR and XRD analyses revealed that the cellulose II crystal structure was disrupted, the structure became 100 amorphous after 5min of stabilization and cross-linked aromatic structures increased. DSC and TGA results show that the thermal resistance of stabilized fibers is significantly improved. These findings indicate that stabilized viscose rayon fibers have attained sufficient thermal stability for the subsequent stages while also making significant contributions to the optimization processes for the efficient production of viscose rayon-based activated carbon fibers.