Abstract

Inspired by the phosphorylation of amino acids, a facile surface grafting approach with dimethyl phosphate (DMP) was developed to endow durable flame retardancy to wool fabrics. The grafting behavior between DMP and wool fibers was investigated by ATR-FTIR analysis and XPS spectroscopy. After undergoing the grafting modification process, the flame-retardant ability of the grafted sample was clearly enhanced, with an increase in the limiting oxygen index (LOI) value from 23.8 % to 30.5 %. Even after 25 washing cycles, it still retained 27.0 %. Meanwhile, cone-calorimeter tests (CCT) demonstrated that the grafted wool fabric achieved a peak heat release rate that decreased by 28.1 % and total heat release decreased by 19.2 %. The grafted wool fabric also showed better thermal stability, with T50% increased from 370 °C to 397 °C (N2 atmosphere), 408 °C to 439 °C (air atmosphere). Char residues had a large increase, from 0.6 % to 21.8 % (air atmosphere), during a thermogravimetric (TG) test. Moreover, char residue analysis confirmed that the introduced phosphorylated structure could assist the wool fabrics to form intensive, expanded protective char residue after exposure to flame, protecting the matrix from decomposition. In this work, we provide a facile strategy for fabricating durable flame-retardant (FR) wool fabrics under a low temperature.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.