Assembling MXene with bio-phytic acid: Improving the fire safety and comprehensive properties of epoxy resin

Phytic acid (PA)-modified MXene (P-MXene) was prepared combination selective etching with assemble method, and was mixed with epoxy resin (EP) to investigated its flame retardancy, thermal conductivity, conductivity and mechanical properties. P-MXene exhibited two-dimensional single layer structure and had good char-forming property with 86.7% char residue at 800 degrees C. The cone calorimetry test results showed that P-MXene endowed EP with excellent flame retardancy. Compared with pure EP, the peak heat release rate, peak smoke release rate, peak CO generation rate, and peak CO2 generation rate of EP composites with 2 phr P-MXene decreased by 38.6%, 31.6%, 38.7% and 40.6%, respectively. The flame retardant mechanism was attributed to physical barrier, catalyzing carbonization effect, oxidative thermal degradation and physical barrier effect. Additionally, the conductivity and mechanical properties of EP composites were slightly reduced. This work provides a promising method to design multifunctional polymers.

Automated summary

In this study, PA-modified MXene (P-MXene) was prepared and mixed with epoxy resin (EP) to investigate its flame retardancy and thermal conductivity. The results showed that P-MXene endowed EP with excellent flame retardancy, while the conductivity and mechanical properties were slightly reduced.