Abstract:

In order to improve the flame retardant finishing effect of wool fiber, a silicon-phosphorus hybrid DDPSi-FR, synthesized by research team, was applied. By means of scanning electron microscopy (SEM), X ray diffraction (XRD), FT-infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TG/DSC), the surface morphology, element content, fiber crystallinity, infrared absorption and thermal stability of finished wool were determined. The results showed that, compared with the untreated wool, not only the elements of phosphorus and silicon emerged in DDPSi-FR finishing wool, but also the percentage of oxygen increased by 26.5%; The mass loss rate of endothermic degradation decreased by 5.3%, the exothermic temperature of char yield increased about 30℃, and the residual amount of pyrolytic char increased by more than 400% at 800℃; For DDPSi-FR finishing wool fiber, the damage char length of vertical burning reduced by 55.9%, the limiting oxygen index was increased by 10.4%, and the standard washing withstood 15 times, achieving the B1 level of decorative and protective flame retardant fabrics.

Key words: wool, flame retardant finishing, silicon-phosphorus hybrid monomer, thermal stability