Comparison and Characterisation of Regenerated Chitosan from 1-Butyl-3-methylimidazolium Chloride and Chitosan from Crab Shells

Abstract

Chitosan is a biopolymer derived from chitin which is naturally occurring in the exoskeleton of crustaceans. This paper reports dissolution and regeneration of chitosan by directly dissolving in an ionic liquid solvent, 1-butyl-3-methylimidazolium chloride (BMIMCl). This will provide an ideal platform to solubilise these kinds of polymers to achieve the dissolution. The current study dissolved chitosan from crab shell utilising BMIMCl as a solvent and characterised the resultant regenerated polymer. The regenerated chitosan showed increased hydrogen bonding when characterised by Fourier transform infrared (FTIR) spectral analysis. In addition, the study also compared the characteristics of regenerated and generic chitosan. The regenerated chitosan was also evaluated for antimicrobial properties and showed to possess antibacterial features similar to the commercial grade. This method can be utilised in future for blending of polymers with chitosan in a dissolved phase.

Biosynthesis and Analytical Characterization of Iron Oxide Nanobiocomposite for In-Depth Adsorption Strategy for the Removal of Toxic Metals from Drinking Water

“…In the FT-IR spectrum, I-Fe 3 O 4 -NBC showed broadband at ~ 3421 cm −1 , which might be due to the stretching vibration of O–H and N–H functionalities present in chitosan (natural polymer). Moreover, the peaks at ~ 1643 and ~ 1560 cm −1 are attributed to O–H and N–H bending vibrations, respectively [ 31 , 56 ], which confirmed the chitosan coating over the I-Fe 3 O 4 -NPs. The strong peak appeared at 1088 cm −1 , possibly due to stretching vibrations of the C–O–C bond of chitosan (polysaccharide) [ 57 ].…”

“…1 b). The peaks around ~ 3371, ~ 1643 cm −1 are due to stretching and bending vibrations of O–H group, respectively [ 31 , 56 ]. Moreover, the peak at 577 cm −1 is due to Fe–O stretching, which confirms the presence of I-Fe 3 O 4 -NPs.…”

Dry Powder Comprised of Isoniazid-Loaded Nanoparticles of Hyaluronic Acid in Conjugation with Mannose-Anchored Chitosan for Macrophage-Targeted Pulmonary Administration in Tuberculosis

“…Moreover, the peak of mannose stretch can also be seen at 850 cm −1 . The peak at 1600 cm −1 was characteristic of CO-NH 2 in CS, whereas the peak at 3500 cm −1 demonstrated OH bond widening [ 34 ].…”

Preparation and Performances of Warp-Knitted Hernia Repair Mesh Fabricated with Chitosan Fiber

“…This inhibits the metabolism of bacteria and results in the death of the bacteria [27]. There are many other factors that affect the antibacterial activity of chitosan [28,29], including molecular weight [30] and degree of deactivation [31]. The rate of bacterial inhibition against E. coli of the three kinds of fabric was 99.99%, 99.75%, and 99.60%, and the rate of bacterial inhibition against S. aureus of the three kinds of fabric was 99.99%, 99.97%, and 99.92%, respectively.…”