A Circular Manufacturing Platform for High-Performance Cellulosic Fibers via Hydrogen-Bond Unzipping and Rezipping.
basic_science · Level V
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- Record sourced from PubMed, PMID 42138816.
- Also identified by DOI 10.1002/adma.73389.
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Abstract
This study outlines a closed-loop manufacturing process for cellulosic fibers designed to meet the textile industry's urgent demand for eco-friendly, cost-effective solvents, circular-design principles, and superior material performance. The process utilizes a deep eutectic solvent composed of calcium chloride, formic acid, and water, which effectively facilitates cellulose dissolution and partial esterification. Followed by dry-jet wet spinning and ethanol-induced coagulation, the initially disordered cellulose chains are reorganized into an ordered, compact fibrillar structure. The resulting fibers showcase a relative crystallinity of 63.9%, tensile strength of 222 MPa, elongation exceeding 20%, and thermal stability above 180°C. Furthermore, they possess textile-relevant properties including thermal conductivity of 0.064 W·m<sup>-1</sup>·K<sup>-1</sup>, moisture regain of 12.4%, and luster comparable to cuprammonium rayon. Significantly, the process allows for the concurrent recovery of both the solvent and coagulant, maintains fiber reusability, and minimizes waste and costs. The life-cycle assessment indicates that this approach significantly reduces the carbon footprint and resource depletion compared to conventional rayon production. These findings establish a cost-effective, eco-friendly alternative to current solvent systems, addressing both environmental and industrial needs.