Abstract
The adenine nucleotide (AMP-Na2) was modified to introduce unsaturated double bonds for photografting onto cotton fabrics together with l-Cysteine (l-Cys) monomer to prepare synergistic bio-based flame retardant cotton fabrics. The chemical structure of AMP-Na2/ l-Cys monomers, surface morphology, residual carbon morphology, thermal properties and flame retardant properties of photografted flame retardant cotton fabrics were analyzed. FT-IR and 1H NMR spectra verified the AMP-Na2 and l-Cys monomers with unsaturated double bonds. Scanning electron micrographs revealed the carbon residue of photografted fiber maintained a natural curled and fiber shape. TGA showed that the major pyrolysis temperature of cotton fabric declined by 51 °C and the weight loss reduced by 20.5%, proving good charring effect of flame retardant layer via photografting of AMP-Na2/l-Cys monomers. The afterflame and afterflow time of photografted cotton fabric were nearly decreased to 0 s. The LOI value of photografted cotton fabric was 27.34% and decreased by 7.9% after 20 washing times. The peak heat release rate and total heat release decreased from 198.05 kW/m2 and 9.94 MJ/m2 to 34.49 kW/m2 and 4.47 MJ/m2, respectively. The experimental results indicated that durable flame retardancy of cotton fabrics was achieved via facile photografting of AMP-Na2/l-Cys monomers.
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This work was supported by the Youth Project of National Natural Science Foundation of China (Grant No. 51803017) and the General Program of Scientific Research Fund Project of Educational Department of Liaoning Province in 2021 (Grant No. LJKZ0530).
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YL, Writing, Formal analysis and investigation. XW, Writing-review and editing, Funding acquisition, Resources, Methodology. ZL, Formal analysis and investigation. JW, Resources. BD, Resources.
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Liu, Y., Wang, X., Li, Z. et al. Construction of biological flame retardant layer on cotton fabric via photografting of nucleotide/amino acid monomers. Cellulose 29, 1205–1218 (2022). https://doi.org/10.1007/s10570-021-04317-4
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DOI: https://doi.org/10.1007/s10570-021-04317-4