High-Efficiency Dry-Jet Wet Spinning of Ultratoughness Regenerated Wool Keratin Fibers.
basic_science · Level V
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- Record sourced from PubMed, PMID 40123370.
- Also identified by DOI 10.1021/acs.nanolett.4c05181.
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Abstract
Regenerated wool keratin fibers (RWKFs) featuring their ecofriendliness, ample resources, and intrinsic biocompatibility have attracted significant interest, while their high-value-added applications are still severely limited by inadequate mechanical properties and complex fabrication processes. Herein, a straightforward dry-jet wet spinning technique without post-treatment processes is proposed to prepare ultratoughness RWKFs. The as-spun fibers achieve a macroscale hierarchical structure due to the preorientation of nanoscale α-keratin protofibrils in air-gap drawing of dry-jet wet spinning, while α-keratins are preserved in large quantities because of no additional post-treatment stretching. As a result, the fabricated RWKFs achieve a tensile strength of ∼142.7 MPa, an outstanding elongation of ∼171.7%, and a record high toughness of ∼176.3 MJ m<sup>-3</sup>, outperforming natural wool and previously reported regenerated keratin fibers. Moreover, the reported RWKFs' dyeability, moisture-induced shape-memory capacity, and electric generation performance remarkably expand their applications in textiles or even smart apparel.