title: Click chemistry modification of natural keratin fibers for sustained shrink-resist performance.
abstract: This paper introduces a novel chemical treatment for achieving sustained shrink-resist performance on natural keratin fibers. The new treatment involves the controlled reduction of keratin in the cuticle region of the fiber, and the application of a water soluble diacrylate, namely glycerol 1,3-diglycerolate diacrylate (GDA), on the reduced keratin substrate. The acrylate groups of the GDA react with cysteine residues in the reduced keratin through thiol-ene click reactions at room temperature, leading to GDA grafting and the formation of GDA crosslinks in the keratin structure. The modified substrates were characterized by infrared spectroscopy and scanning electron microscopy, and assessed for its shrink-resistance and wet burst strength. This chemical modification has shown to alter the fiber surface morphology and hydrophilicity, resulting in substantially improved shrink-resistance with good fiber strength retention. Possible shrink-resistance mechanisms were also discussed.
authors.affiliation: CSIRO Manufacturing Flagship, PO Box 21, Belmont 3216, VIC, Australia; College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, Shanghai 201620, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Yu
authors.affiliation: CSIRO Manufacturing Flagship, PO Box 21, Belmont 3216, VIC, Australia. Electronic address: Jackie.cai@csiro.au.
authors.forename: Jackie Y
authors.initials: JY
authors.lastname: Cai
authors.affiliation: CSIRO Manufacturing Flagship, PO Box 21, Belmont 3216, VIC, Australia.
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Church
authors.affiliation: School of Fashion and Textiles, RMIT University, 25 Dawson Street, Brunswick 3056, VIC, Australia.
authors.forename: Lijing
authors.initials: L
authors.lastname: Wang
mesh_terms: D000179:Acrylates / Q000737:chemistry; D057930:Click Chemistry / Q000379:methods; D005990:Glycerol / Q000031:analogs & derivatives / Q000737:chemistry; D006860:Hydrogen Bonding; D057927:Hydrophobic and Hydrophilic Interactions; D007633:Keratins / Q000737:chemistry* / Q000648:ultrastructure; D055595:Mechanical Phenomena; D013499:Surface Properties
chemical_list: D000179:Acrylates; C532527:glycerol 1,3-diglycerolate diacrylate; D007633:Keratins; D005990:Glycerol
keywords: Chemical modification; Click chemistry; Diacrylate; Keratin fiber; Shrink-resist; Thiol-ene