Chitosan Fiber Raw Material

Catalog	ACM9012764-38
CAS	9012-76-4
Synonyms	beta-(1,4)-2-Amino-2-deoxy-D-glucose;
Molecular Formula	(C6H11NO4)n
Appearance	White Powder
Bulk Density	≥0.30g/ml
Content	Heavy metals ≤10ppm
Feature	Anti-Pilling, Abrasion-Resistant, Flame Retardant, Anti-Distortion
Length	38 mm
Moisture Content	≤10.0%
Particle Size	80 mesh
pH	7.0-8.0
Type	Staple
Viscosity	50 mpa.s-800 mpa.s

Case Study

Effect of Molecular Weight and Deacetylation Degree of Chitosan Fiber on Antibacterial Performance

Li J, et al. Carbohydrate Polymers, 2022, 280, 119031.

In this article, 8 chitosan fibres were examined for antibacterial capacity towards Escherichia coli, Staphylococcus aureus and Candida albicans, as well as their dependence on molecular weight (Mw) and deacetylation degree (DD). These samples of chitosan fibre D, E, F, I, J, K, L and M all came from shells of crabs and were free of other antibacterial agents.
This work established the relationship between antibacterial activity and Mw and DD, and finally obtained the antibacterial mechanism of chitosan fiber. Specifically, with the increase of Mw, the antibacterial rate of samples I, K, L, and M against Staphylococcus aureus showed a trend of first increasing and then decreasing. Under the same DD, the bactericidal activity against Escherichia coli decreased with the increase of Mw.

Adsorption and Functional Enhancement of Natural Lac Dye on Chitosan Fibers

Liu L, et al. Reactive and Functional Polymers, 2013, 73(11), 1559-1566.

Natural lac dye was applied to dye chitosan fibers and the effect of dye adsorption on the functionality of the dyed chitosan fibers was studied.
· Adsorption and dyeing experiments
Pure chitosan fibers (2.5 dtex, 38 mm) without chemical crosslinking were treated in a scouring bath of nonionic surfactant (polyoxyethylene alkyl ether) at a bath ratio of 50:1 at 60 °C for 30 min to remove the finishing agent. All adsorption and dyeing experiments were performed in sealed conical flasks immersed in a low noise oscillating dyeing machine. The bath ratio was 100:1. After adsorption and dyeing, the chitosan fibers were washed with distilled water and dried.
· Adsorption mechanism
The adsorption mechanism was shown to be electrostatic and non-electrostatic interactions between lac dye and chitosan fibers, contributing to Langmuir and Nernst adsorption, respectively. Decreasing the temperature and the amount of neutral electrolyte used and increasing the lac dye concentration increased the adsorption of lac dye on chitosan fibers.
· Functionality of dyed chitosan fibers
The functional properties of dyed chitosan fibers are greatly related to the adsorption amount of shellac dye. The dyed chitosan fibers showed significantly enhanced antioxidant activity and deodorization performance against ammonia, and the performance increased significantly with the increase of the applied concentration of shellac dye. Shellac dye provided chitosan fibers with excellent washing fastness.