Chitosan-High DDA%-Low-Medium Mw

Catalog	ACM9012764-49
CAS	9012-76-4
Description	High DDA% – Low-Medium Mw
Molecular Formula	(C6H11NO4)n
Appearance	Off-white powder
Application	Biocompatible, antibacterial and environmentally friendly polyelectrolyte with a variety of applications including water treatment, chromatography, additives for cosmetics, textile treatment for antimicrobial activity, novel fibers for textiles, photographic papers, biodegradable films, biomedical devices, and microcapsule implants for controlled release in drug delivery.
Storage	<25°C, cool dry environment, well-sealed
Feature	Degree of Deacetylation (DDA) – 91.5%
Form	Powder
Moisture Content	0.096
Packaging	100g, 250g
Particle Size	80 mesh
pH	6.5-8.5
Type	Crustacean Source
Viscosity	75 (mpa.s, 20 °C)

Case Study

Development of Collagen Fiber/Chitosan-Based Non-Fluorinated Hydrophobic and Oil-Resistant Materials

Jing X, et al. Carbohydrate Polymers, 2021, 266, 118173.

A non-fluorinated, oil-repellent and hydrophobic coating material was made using collagen fiber, chitosan and polydimethylsiloxane (PDMS) as raw materials. This green prepared hydrophobic and oleophobic composite material can be applied to food packaging, self-cleaning etc. Chitosan addition was found to be best at 30 wt%, PDMS concentration was best at 5 wt%.
The manufacturing of the collagen fiber-chitosan-PDMS covered paper.
· Collagen fiber/chitosan solution were mixed at particular amounts and heated it to 80 °C. One gram of collagen fiber, and an amount of defined chitosan (deacetylation >90%, Mn = 50,000-150,000 g/mol) was added in 25 ml of deionized water and stirred for 30 minutes at 80 °C. 0.05 g of glutaraldehyde was then added to start the Schiff base reaction. At the same time, PDMS was mixed with toluene to produce the desired concentration.
· After a reaction with the collagen fibers, chitosan and glutaraldehyde had taken place, filter paper was soaked for 3 minutes in the solution, and air-dried for 1 hour at room temperature. The PDMS solution was prepared by dissolving PDMS and hydrophobic nano silica in toluidine in the ratio of mass:1 40:1. Then one side of the collagen/chitosan paper substrate was coated with the PDMS solution, air dried at room temperature for 1 hour, and oven-dried at 60 °C for 2 hours.

Graphene Oxide/Chitosan Fiber Preparation and Congo Red Absorption on Them

Du Q, et al. Chemical Engineering Journal, 2014, 245, 99-106.

Graphene oxide (GO)/chitosan (CS) fibers with porous structures (GO/CS/ETCH fibers) were prepared by wet spinning technology and etching treatment. The porous GO/CS/ETCH fibers can be used to adsorb Congo red dye, and its equilibrium data can be perfectly described by the Langmuir isotherm. The maximum adsorption capacity reached 294.12 mg/g.
Preparation of GO/CS/ETCH fibers
· 40 g of chitosan (CS > 90.0% deacetylation, viscosity 100cps) was mixed with 960 mL of a solution of 10% v/v acetic acid. Next, 2.1 g of graphene oxide (GO) and 40 g of silica nanoparticles were introduced into the CS mixture. The solution was vigorously stirred for 5 hours to ensure homogeneity, followed by pre-filtration through a filter press to eliminate larger particles and air bubbles.
· The resulting mixture was transferred by gravitational force through a wheel-powered metering pump to a stainless steel spinneret with a 0.5 mm diameter opening, which was immersed in a coagulation bath of 2 M NaOH solution. After fiber formation, the fibers were thoroughly washed with a 40% methanol solution and air-dried.
The dried fibers were incubated in 30% HF solution for 48 hours to remove the silica nanoparticles. Finally, the GO/CS/ETCH fibers were obtained by washing with deionized water and air-drying.