Conversion of Chitosan to Facilitate Preparation of Chitosan Carboxylic Salt with Moisture Absorption-Retention Abilities

Abstract

Different chitosan carboxylic salts were successfully prepared via a simple way using chitosan and oxalic, fumaric, salicylic acid for the first time. The characterizations of the salts were evaluated by FT-IR, 13C NMR, 1H NMR, elemental analysis, XRD. The solution properties and moisture absorption-retention abilities of the salts were compared with chitosan. The result indicated that chitosan and carboxylic acid were combined with salt bond. The properties of the salts were related to the type of carboxylic acid added and the formation of salt bond. The water-solubility, wetting effect and moisture-retention absorption abilities of the salts were better than chitosan. They therefore have the potential to substitute for chitosan for easy use as coating in food preservation.

Fabrication & Characterization of Chitosan Coated Biologically Synthesized TiO2 Nanoparticles against PDR E. coli of Veterinary Origin

“…among chitosan and TiO 2 NPs in water solution was possibly promoted by the electrostatic force as chitosan carried positive charges. Whereas, TiO 2 NPs were negatively charged furthermore, the amine groups of chitosan were protonated to ammonium thus adding the positive charges to chitosan [32][33][34]. is phenomenon facilitated the surface coating of TiO 2 by chitosan and also prevented the aggregation of CS-NPs coated TiO 2 NPs (Figure 7).…”