Thermoplastic Starch/Ternary Deep Eutectic Solvent/Lignin Materials: Study of Physicochemical Properties and Fire Behavior

The goal of the work was to prepare thermoplastic starch (TPS), for first time plasticized with ternary deep eutectic solvents (DESs) based on urea/resorcinol/choline chloride (URCC) in a 2:1:1 molar ratio and enriched lignin as an environmentally friendly functional alternative agricultural plastics. Potato effectively modified DES via twin-screw extrusion presence up 10 pph (L10) without significant loss elasticity (tensile strength 7.4 MPa, elongation at break 65%) good thermocompressing properties (dynamic mechanical thermal analysis (DMTA) results) highly amorphous materials (X-ray diffractometry (XRD) physically (Fourier transform infrared (FTIR) results). URCC mixture acted both plasticizer dissolving media lignin, facilitating mutual processing. Moreover, cone calorimetry TPS revealed that they exhibited better fire-retardant than polymers commercially used plastics (PE, PP, PLA). Obtained results indicate TPS/DES TPS/DES+L can be as, e.g., biodegradable, safe, mulches do not have removed from cultivating fields.