New generation photo-stabilizer strategies of Poly(lactic acid), donor-acceptor-donor segment as a fluorescent additive

Herein, we have designed and introduced novel fluorescent molecule as photo stabilizer of poly(lactic acid). This work is presenting a novel approach using Donor-Acceptor-Donor (D-A-D) molecules synthesized through a one-step procedure. The D-A-D moiety demonstrates remarkable photo-stabilization capabilities for PLA films. Characterization techniques including 1H NMR, 13C NMR, FTIR, spectroscopies and SEM patterns confirm the successful synthesis of the D-A-D molecule and its efficient blended into PLA films. Interestingly, Ultraviolet (UV) and photoluminescence (PL) measurements reveal the D-A-D molecule's ability to absorb UV light and emit fluorescent green light, indicative of its photo-stabilization mechanism. Further analysis elucidates the interaction between the D-A-D molecule and the PLA polymer backbone, ensuring a homogenous distribution of the stabilizer within the film matrix and enhancing overall stability. The proposed mechanism involves the D-A-D molecule effectively absorb UV light generated during photo-degradation and emits it as visible green light without harming the chemical structure of PLA film. Our findings underscore the potential of D-A-D molecules as versatile photo-stabilizers for PLA and highlight their broader implications for sustainable material applications. This study contributes to the advancement of PLA film stability and opens doors for the development of innovative stabilization strategies depending on organic electronic principles. Future research could explore multifunctional applications of D-A-D molecules, including sensor materials and other applications.