Green and Sustainable approach towards synthesis of Polymeric composite for transparent cellulosic flame retardant

This is a novel approach to utilize the polymer functionalities for synthesis of polymeric deep eutectic solvent. Due to the presence of hydroxyl moieties in the polyphosphoric acid, it was utilized for the formation of polymeric deep eutectic solvent with the combination of choline chloride and choline hydroxide. The synthesized composition is liquid and transparent. Synthesized PD was applied on cotton fabric for flame retardant application. Therefore, synthesized PDC will not alter the colour of cotton fabric. The synthetic route of the PDC is simple, sustainable, biodegradable, and greener, making it important to approach the environment-friendly composition. The synthesized composite was analyzed and characterized to check its thermal stability, morphological structure, elemental composition, and FR properties. The PDC sustained up to 600 s (10 minutes) on continuous flame exposure with the formation of char barrier on the cotton fabric. On the other hand, pristine cloth is totally burned out in 10 s with the formation of a small amount of smoke. The standard flame-related techniques, such as vertical flammability test, showed 2.4 cm char length, while the composite has 48% limiting oxygen index. The green and sustainable composite approach makes it more suitable and susceptible to FR application in cotton fabric. This composite will open a wide area of synthesizing polymeric DES and its utilization for various applications. [Display omitted]