Rational Design of a Cross-Linked Fully Biobased Flame Retardant for High-Efficiency Fire Safety and Multifunctional Enhancement in Polylactic Acid Composites

Developing fully biobased green flame retardants to comprehensively enhance the performance of polylactic acid (PLA) has always been a significant challenge. In this study, a novel fully biobased flame retardant, CQEA, was successfully prepared by constructing a cross-linked network using three biobased materials: chitosan, phytic acid, and quercetin. Experimental results demonstrated that incorporating 6 wt % CQEA into PLA increased the limiting oxygen index (LOI) of the composite to 26.9%, successfully meeting the UL-94 V-0 testing standard. Moreover, the peak heat release rate (pHRR) was significantly reduced from 428 to 303 kW/m2, representing a decrease of 29.3%. Additionally, CQEA not only enhanced the…

• HP
  Hubei Provincial Department of Education

  Award: D20231701
• NN
  National Natural Science Foundation of China

  Award: 22305181
• WT
  Wuhan Textile University