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- Title
Hydroxyl Changing Mechanism of Cotton Cellulose during Alkaline Treatment Characterized by ATR-FTIR in Combination with Two-Dimensional Correlation Spectroscopy.
- Authors
Bolin Ji; Zijing Cai; Gang Sun; Kelu Yan
- Abstract
Hydroxyl changes of cotton cellulose treated with sodium hydroxide (NaOH) solution is closely related with hydrogen bonding (H-bonds) between different hydroxyls, which is difficult to directly measure by common instrumentational methods of X-ray diffraction (XRD) or Fourier transform infrared (FTIR) spectroscopy. Two-dimensional correlation spectroscopy (2Dcos) is a powerful tool to analyze the changes of molecular spectroscopy. In this study, the alkaline-treated cotton cellulose was monitored in real time by attenuated total reflection (ATR) in combination with 2Dcos. Results indicated that the H-bonds changed in the following sequence order: v(O3-H3...O5) (intramolecular) → v(O6-H6...O3') (intermolecular) → v(O2-H2...O6) (intramolecular). Moreover, Gaussian computational modeling analysis also confirmed this mechanism. Both XRD and FTIR results indicated the decrease of crystallinity of the alkaline-treated cotton cellulose over prolonged time.
- Subjects
MOLECULAR spectroscopy; ATTENUATED total reflectance; SPECTROMETRY; CELLULOSE synthase
- Publication
AATCC Review, 2020, Vol 20, Issue 5, p49
- ISSN
1532-8813
- Publication type
Article
- DOI
10.14504/ajr.7.5.1