首页|Novel Si-MXene/PAPP hybrid system for high-performance flame-retardant polypropylene composites

Novel Si-MXene/PAPP hybrid system for high-performance flame-retardant polypropylene composites

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  • NETL
  • NSTL
  • Elsevier
The development of high-performance flame-retardant polypropylene (PP) composites is essential for enhancing fire safety across various industries. However, conventional intumescent flame retardant systems often suffer from poor char stability, weak condensed-phase protection, and insufficient gas-phase flame inhibition. To address these challenges, this study introduces a synergistic system combining Si-modified MXene (Si-MXene) and piperazine-modified ammonium polyphosphate (PAPP) to enhance the flame retardancy of PP composites. The piperazine modification of PAPP improves its compatibility with PP, facilitating uniform dispersion and enhancing its catalytic charring capability. Simultaneously, Si-modified MXene reinforces the char layer by promoting the formation of a highly graphitized and compact carbon structure, effectively blocking heat and oxygen transfer. As a result, the Si-MXene/PAPP system significantly reduces the peak heat release rate (PHRR) of PP by 52.6 % and total heat release (THR) by 35.4 %, while substantially improving thermal stability and char quality. Moreover, gas-phase analysis confirms that phosphorus radicals (P-, PO) and non-flammable gases (NH_3, H_2O) scavenge combustion free radicals and dilute flammable volatiles, effectively suppressing flame propagation. This study provides a novel approach to developing high-efficiency flame-retardant PP composites, offering new insights into the synergistic mechanisms of MXene-based hybrid flame retardants and advancing the design of eco-friendly, high-performance polymeric materials for safety-critical applications.

Flame-retardant polypropyleneSi-modified MXenePiperazine-modified APPSynergistic flame retardancy

Qinling Liu、Junhan Chu、Yuhui Xie、Zhaoyu Li、Feng Wu、Dong Feng、Yang Meng、Yi Mei、Delong Xie

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Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China||Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, Kunming 650500, China||The International Joint Laboratory for Sustainable Polymers of Yunnan Province, Kunming 650500, China||Yunnan Technological Innovation Center of Phosphorus Resources, Kunming 650600, China

2025

10.1016/j.polymdegradstab.2025.111376

Polymer degradation and stability

Polymer degradation and stability

SCI
ISSN：0141-3910
年,卷(期)：2025.239(Sep.)
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