Ti3C2Tx/含铁聚多巴胺层状双氢氧化物复合体系作为疏水阻燃剂用于降低乙烯-醋酸乙烯的火灾危险性

IF 6.3 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-03-01 DOI:10.1016/j.polymdegradstab.2025.111297

Weidou Li , Yuwei Zhou , Zihan Zeng , Yile Ding , Xinyang Wu , Lei Wang , Wufei Tang , Qi Zhu , Jiayao Zhou , Sheng Xu

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引用次数: 0

摘要

近年来，MXene （Ti3C2Tx）在高分子复合材料中得到了广泛的研究和应用。然而，MXene在高分子材料中容易团聚，与疏水聚合物的相容性有明显的局限性，导致其力学性能受损，极大地阻碍了其阻燃性能的提高。本研究中，为了提高阻燃剂与EVA的界面相容性，以聚多巴胺为粘合剂，在Ti3C2Tx/层状双氢氧化物（MgAl LDH）表面负载铁负载聚多巴胺（PDA-Fe），制备了Ti3C2Tx/MgAl LDH/PDA-Fe复合阻燃剂。由于PDA的强附着力，使阻燃剂与EVA的界面相容性得到了很大的改善。Ti3C2Tx/MgAl LDH/PDA-Fe的疏水性显著增强，水接触角达到88.6°，进一步增强了EVA复合材料的阻燃性能。添加5 wt% Ti3C2Tx/MgAl LDH/PDA-Fe的EVA复合材料的峰值放热率为659.7 kW·m−2，比纯EVA降低了29.1%。此外，MgAl LDH抑制了Ti3C2Tx在EVA中的积累，它们的协同作用提高了EVA复合材料的防火安全性。因此，本研究为制备能够改善与EVA界面相容性的疏水阻燃剂提供了新的范例，具有广阔的应用前景。

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Ti3C2Tx/layered double hydroxide hybrid system decorated with iron-loaded polydopamine as a hydrophobic flame retardant for reducing the fire hazard of ethylene-vinyl acetate

In recent years, MXene (Ti₃C₂Tx) has been extensively studied and used in polymer composites. However, MXene easily agglomerates in polymeric materials and has significant limitations in compatibility with hydrophobic polymers, resulting in the impairment of their mechanical properties and greatly hindering the improvement of their flame retardant properties. In this study, in order to improve the interfacial compatibility of the flame retardant with EVA, we prepared a Ti₃C₂Tx/MgAl LDH/PDA-Fe composite flame retardant by loading iron-loaded polydopamine (PDA-Fe) on the surface of Ti₃C₂Tx/layered double hydroxide (MgAl LDH) using polydopamine as an adhesive. Due to the strong adhesion of PDA, the interfacial compatibility between the flame retardant and EVA was greatly improved. And the hydrophobicity of Ti₃C₂Tx/MgAl LDH/PDA-Fe was greatly enhanced with a water contact angle value of 88.6°, which further enhanced the flame retardant properties of the EVA composites. The peak heat release rate of the EVA composites with the addition of 5 wt% Ti₃C₂Tx/MgAl LDH/PDA-Fe was 659.7 kW·m⁻², which represented a 29.1 % decrease compared to that of Neat EVA. In addition, the MgAl LDH inhibited the accumulation of Ti₃C₂Tx in EVA, and their synergistic effect improved the fire safety of EVA composites. Thus, this study provides a new paradigm for the preparation of hydrophobic flame retardants capable of improving interfacial compatibility with EVA, which has a promising application.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.