Flame retardant and antibacterial properties of PLA/PHMG-P/APP composites |
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| Authors: | Meng Liao Xiang Zhou Lu Fu Liumi Deng Zongmin Zhu Luoxin Wang Shaohua Chen Yuansen Liu |
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| Affiliation: | 1. College of Materials Science and Engineering, Key Laboratory for New Textile materials and Applications of Hubei Province, Wuhan Textile University, Wuhan, China;2. Technology Innovation Center for Exploitation of Marine Biological Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China |
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| Abstract: | Poly(lactic acid) (PLA) has evolved into a commodity polymer with numerous applications. However, its high flammability limits its viability as a perfect alternative to petrochemical engineering plastics. In this study, PLA was modified using polyhexamethyleneguanidine phosphate (PHMG-P) and ammonium polyphosphate (APP). The flame retardant performance of PLA/PHMG-P/APP was investigated based on the limiting oxygen index (LOI), vertical burning test (UL-94), thermogravimetric analysis (TGA), cone calorimetry (CC), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and Raman Spectrometry. Qualitative and quantitative methods were used to determine the antibacterial properties of PLA composites. The LOI of PLA-10% (P:A = 1:4) was 31.7% and was rated V-0 in the UL-94 V-0 test. The antibacterial properties of the composites reflected the antibacterial effects of PLA-10% (P: A = 1:4) against Escherichia coli and Staphylococcus aureus, with the antibacterial rates reaching 93.41% and 93.26%, respectively. PHMG-P and APP had a synergistic flame-retardant effect and improved the flame retardancy of PLA while exhibiting excellent antibacterial properties. |
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| Keywords: | antibacterial resistance flame retardant mechanism poly(lactic acid) synergistic effect |
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