Affiliation:
1. Beijing Graphene Institute (BGI) Beijing 100095 P. R. China
2. College of Energy Soochow Institute for Energy and Materials Innovations (SIEMIS) Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 P. R. China
3. Center for Nanochemistry Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 P. R. China
4. School of Materials Science and Engineering Peking University Beijing 100871 P. R. China
Abstract
AbstractRegenerated wool keratin fibers (RWKFs) have heretofore attracted tremendous interest according to environmental friendliness, ample resource, and intrinsic biocompatibility for broad applications. In this realm, both uncontrollable keratin fibril assembly procedure and resultant insufficient mechanical strength, have greatly hindered their large‐scale manufacture and commercial viability. Herein, a continuous wet‐spinning strategy is put forward to rebuild wool keratin into compact regenerated bio‐fibers with improved strength via disulfide re‐bonding. Dithiothreitol (DTT) has been introduced to renovate disulfide linkage inside keratin polypeptide chains, and bridge keratin fibrils via covalent thiol bonding to form a continuous backbone as mechanical support. A thus‐derived RWKF manifests a tensile strength of 186.1 ± 7.0 MPa and Young's modulus of 7.4 ± 0.2 GPa, which exceeds those of natural wool, feathers, and regenerated wool or feather keratin fibers. The detailed wet‐spinning technical parameters, such as coagulation, oxidation, and post‐treatment, have been systematically optimized to guarantee the continuous preparation of high‐strength regenerated keratin fibers. This work offers insight into solving the concurrent challenges for continuous manufacture of regenerated protein fibers and sustainability concerns about biomass waste.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
Donghua University
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
18 articles.
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