Construction of adenosine triphosphate/phytic acid/dicyandiamide lyocell fabrics with high fire safety and well wearing property

The bio-based flame-retardant treatment for lyocell fabrics is often characterized by low flame-retardant efficiency and deterioration of wearing property. In this study, the modified lyocell fabrics (APDP/Lyocell) with excellent fire safety and wearing property were designed and obtained via hydrogen bonding. The well-coordinated bio-based APDP was evenly distributed on the surface of lyocell fibers. In addition, water solvent was used in the preparation of APDP and the whole treatment process of the resulting lyocell fabrics. The self-extinguishing property of APDP/Lyocell was obtained using the vertical burning test with the APDP loading of 13.0%. Compared with pure lyocell fabrics, the peak of heat release rate and total heat release of APDP/Lyocell decreased by 69.2% and 57.1%, respectively. The fire safety of APDP/Lyocell was attributed to effective synergistic charring, flammable gas dilution, and free radical capture. Additionally, after 100 dry friction cycles, the APDP/Lyocell retained its self-extinguishing property, and its limited oxygen index value was still 27.5%, illustrating excellent friction durability. Furthermore, the wearing properties of APDP/Lyocell, such as air permeability, whiteness, moisture regain, and handle, were not inferior to those of pure lyocell fabrics, making it a promising flame-retardant material.