BODIPY coated on MXene nanosheets for improving mechanical and fire safety properties of ABS resin

Acrylonitrile-butadiene-styrene (ABS) resin is a commonly used engineering thermoplastic . Nevertheless, the fire toxicity hazards (HCN, NO x , NH 3 and CO) generated from the combustion of ABS remains a major concern, especially in building fire scenarios. To address this issue, boron dipyrromethene (BODIPY) modified MXene (Ti 3 C 2 T x ) nanosheets were prepared and utilized as a flame retardant for ABS. The loading of 0.5 wt% BODIPY-MXene resulted in the uniform dispersion in ABS. Accordingly, the tensile strength , Young's modulus and elongation at break of ABS/BODIPY-MXene0.5 were improved by 27.8%, 18.6% and 17.9% respectively compared to neat ABS, suggesting the enhanced mechanical properties . The limiting oxygen index (LOI) value was increased from 19.5% for neat ABS to 21.5% and 23.5% for ABS/BODIPY-MXene0.5 and ABS/BODIPY-MXene2.0 benefitted from the rapid carbonization . The cone calorimeter coupled with FTIR analysis showed that the reductions in peak heat release rate (−24.5%), peak smoke production rate (−18.4%), peak concentration of HCN (−33.5%), NO (−22.0%), N 2 O (−46.6%), NH 3 (−76.0%) and CO (−28.8%) were achieved by incorporating 0.5 wt% BODIPY-MXene to ABS in comparison with pure ABS. The improved fire safety properties were primarily attributed to the excellent barrier, free radical capture, and catalytic carbonization effect of BODIPY-MXene nanosheets within ABS matrix.