Modulation of composite hydrogel consisting of TEMPO-oxidized cellulose nanofibers and cationic guar gum

Preparation of Maleic Anhydride–Polystyrene Microsphere Cross-Linking Shikonin and Oxidized Nanocellulose Film for Freshness Monitoring

“…The FTIR spectra of pure oxidized CNF film and SMA-SKN/oxidized CNF film are shown in Figure b. The FTIR spectral curve of pure oxidized CNF showed that the broad peak at 3334 cm –1 was due to the O–H stretching vibration peak of oxidized nanocellulose, , the peak at 2904 cm –1 was due to the C–H stretching vibration of oxidized nanocellulose alkyl group, the peaks at 1636 and 1427 cm –1 were caused by the asymmetric and symmetric stretching of oxidized −COO, the peak at 1027 cm –1 was due to the C–O stretching vibration of oxidized nanocellulose, and the peak at 898 cm –1 was due to the C–O–C stretching vibration . The FTIR spectral curve of SMA-SKN/oxidized CNF was similar to that of the pure oxidized CNF film, only with a higher peak intensity.…”

“…The FTIR spectral curve of SMA-SKN/oxidized CNF was similar to that of the pure oxidized CNF film, only with a higher peak intensity. The difference in peak intensity was mainly a result of the physical interaction (van der Waals force and H bond force) between the hydroxyl groups of the SMA microsphere. , The XRD patterns of pure oxidized CNF film and SMA-SKN/oxidized CNF film are shown in Figure S2 of the Supporting Information.…”