Multifilament cellulose/chitin blend yarn spun from ionic liquids.

Area of Science:

• Materials Science
• Polymer Chemistry
• Biotechnology

Background:

• Cellulose and chitin are biopolymers that decompose before melting, limiting their processing into fibers.
• Current chitin fiber processing often involves toxic solvents and chemical modification, leading to chitosan.
• Developing sustainable and effective methods for processing these biopolymers is crucial for advanced material applications.

Purpose of the Study:

• To propose a novel method for preparing cellulose/chitin blend fibers.
• To utilize ionic liquids (ILs) as environmentally friendly solvents for biopolymer processing.
• To investigate the properties of cellulose/chitin blend fibers for potential applications.

Main Methods:

• Dissolving chitin and cellulose in ethylmethylimidazolium propionate ([C2mim](+)[OPr](-)) ionic liquid.
• Producing multifilament fibers via a continuous wet-spinning process from the one-pot spinning dope.
• Analyzing the rheology of spinning dopes and the structural/physical properties of the resulting fibers.

Main Results:

• Successfully prepared cellulose/chitin blend fibers using ionic liquids.
• The ionic liquid solvent was gentle, removable, recyclable, and did not cause deacetylation.
• Cellulose/chitin blend fibers exhibited enhanced water retention capacity compared to pure cellulose fibers.

Conclusions:

• Ionic liquids provide a viable and sustainable solvent system for processing cellulose and chitin into fibers.
• The developed method overcomes limitations of traditional solvent-based processing and chemical modifications.
• The enhanced water retention of cellulose/chitin blend fibers makes them promising for medical and hygienic applications.