Anti-ultraviolet and semi-durable flame-retardant viscose fabrics fabricated by modified tea polyphenols

Viscose fabrics are characterized as good moisture absorption and dyeability, but the disadvantage of being extremely flammable limits the application of viscose fabrics. In this paper, tea polyphenols (TPs), amino trimethylphosphonic acid (ATMP) and urea were used to synthesize a semi-durable and efficient flame retardant, TBP. The limiting oxygen index (LOI) of Viscose/TBP was 44.2 %, and peak heat release rate was decreased by 91.5 %, indicating the fire risk of viscose fabrics was reduced. Viscose/TBP200-20Ls can pass the vertical flame test after 20 laundering cycles (Ls), and LOI reached 27.0 %. TBP did not cause damage to the mechanical properties of treated viscose fabrics. The transmittance of Viscose/TBP showed a significant reduction compared with those of viscose fabrics in ultraviolet-A and ultraviolet-B region, and its ultraviolet protection factor value reached 86.1 which was better for anti-ultraviolet properties. In a word, Viscose/TBP with anti-ultraviolet properties and flame retardancy was successfully prepared. Meanwhile, flame-retardant viscose fabrics' tensile strength was not decreased.