Polyurethane coating with PDMS/Fe2O3/microencapsulated APP: Enhanced flame retardancy and aging resistance performance

IF 4.5 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-09-18 DOI:10.1016/j.polymer.2025.129114

Lingxin He , Jiaqing Zhang , Yi Guo , Yubiao Huang , Rui Liu , Fengju Shang , Tao Sun , Xianli Zhu , Xia Zhou

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引用次数: 0

Abstract

Cable fireproof coatings are functional materials applied to cable surfaces, designed to form a protective barrier during heating or fire, thereby preventing or slowing flame propagation. This study developed a novel hydrophobic and fireproof coating PU-Fe₂O₃@MAPP/PDMS, based on polydimethylsiloxane (PDMS), metal oxides (γ-Fe₂O₃), and microencapsulated ammonium polyphosphate (MAPP). The optimized formulation of PU-Fe₂O₃@MAPP/PDMS is comprising of 30 wt% PDMS, 1.5 wt% γ-Fe₂O₃, and 10 wt% MAPP, which demonstrated a peak heat release rate (PHRR) reduction of 46.6 % compared to unmodified polyurethane (PU) coatings, alongside superior hydrophobicity (water contact angle 109.9°). The aging processes led to a deterioration in both flame-retardant and hydrophobic properties for both PU and PU-Fe₂O₃@MAPP/PDMS coatings. Notably, the PU-Fe₂O₃@MAPP/PDMS coating demonstrated superior aging resistance, outperforming the unmodified PU in terms of maintaining flame-retardant and hydrophobic functionalities over extended aging periods. Mechanistic studies revealed synergistic effects of PDMS (promoting char formation), γ-Fe₂O₃ (catalytic flame inhibition), and MAPP (gas-phase radical quenching), alongside enhanced aging resistance due to PDMS's molecular entanglement with the PU matrix. This work provides a scalable strategy for designing multifunctional coatings tailored for harsh cable trench environments.

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PDMS/Fe2O3/微胶囊化APP聚氨酯涂料：增强阻燃和耐老化性能

电缆防火涂料是涂在电缆表面的功能材料，用于在加热或着火时形成保护屏障，从而防止或减缓火焰的传播。本研究以聚二甲基硅氧烷（PDMS）、金属氧化物（γ-Fe2O3）和微囊化聚磷酸铵（MAPP）为基料，研制了一种新型疏水防火涂料PU-Fe2O3@MAPP/PDMS。优化后的PU-Fe2O3@MAPP/PDMS配方由30wt%的PDMS、1.5wt%的γ-Fe2O3和10wt%的MAPP组成，与未改性的聚氨酯（PU）涂层相比，峰值热释放率（PHRR）降低了46.6%，同时具有优异的疏水性（水接触角109.9°）。老化过程导致PU和PU-Fe2O3@MAPP/PDMS涂层的阻燃性和疏水性都下降。值得注意的是，PU-Fe2O3@MAPP/PDMS涂层表现出优异的耐老化性能，在延长老化时间内保持阻燃和疏水功能方面优于未改性的PU。机理研究揭示了PDMS（促进炭形成）、γ-Fe2O3（催化火焰抑制）和MAPP（气相自由基淬火）的协同作用，以及PDMS与PU基体的分子纠缠导致的抗老化能力增强。这项工作为设计适合恶劣电缆沟槽环境的多功能涂料提供了一种可扩展的策略。

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.