Interactions between alginate and chitosan biopolymers characterized using FTIR and XPS.

By G. Lawrie, I. Keen, B. Drew, A. Chandler-Temple, L. Rintoul, P. Fredericks, L. Grøndahl. Biomacromolecules, 2007

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Physicochemical properties of alginate-based films: Effect of ionic crosslinking and mannuronic and guluronic acid ratio (2018, background): “The characteristic peaks of alginate were found at 1599 cm 1 related to the asymmetric stretching vibration of C-O bond of COOgroup (Lawrie et al., 2007; Voo et al., 2015); being the peak at 1408 cm 1 related with the symmetric stretching vibration of C-O in COO- group (Pereira, Tojeira, Vaz,Mendes,”
Functionalization of polyester fabrics with alginates and TiO2 nanoparticles (2010, background): “, 2009), the ratio of which affects the physical properties of biopolymer (Lawrie et al., 2007).”
Physico-chemical characterization of chitosan-based edible films incorporating bioactive compounds of different molecular weight (2011, background): “This peak is a consequence of the low volatility of lactic acid (Lawrie et al., 2007).”
Soluble vitamins (vitamin B12 and vitamin C) microencapsulated with different biopolymers by a spray drying process (2016, methodology): “The band at 1656 cm−1 corresponds to the amide I 263 stretching of C=O, as described by Lawrie et al. (2007) [25,30].”
FTIR analysis of natural and synthetic collagen (2018, background): “Chitosan was characterized by the presence of specific absorption peaks at 1404, 1560, 2878, and 3352 cm¡1 (153).”