Supramolecular flame retardants enabled fire-extinguishing polycarbonate with enhanced thermal stability and reduced smoke release

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-12-19 DOI:10.1016/j.cej.2024.158762

Qingyao Gao, Menghe Zhu, Jihang Wang, Jianhao Zhu, Xinliang Liu, Chuanxin Xie, Xilei Chen, Lei Liu, Pingan Song

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Abstract

The creation of mechanically robust, thermostable, and flame-retardant polycarbonate (PC) is highly desirable in the industry. Unfortunately, achieving such a comprehensive performance portfolio remains challenging due to their different governing mechanisms. Most flame retardants provide satisfactory fire retardancy at the expense of other properties. Herein, we rationally design three novel supramolecular flame retardants (PAPZ@Co, PAPZ@La, PAPZ@Fe) containing phosphorus, nitrogen, and transition metal elements based on ionic and metal–ligand coordination interactions. Benefiting from the π-π stacking and ionic interactions, these supramolecular flame retardants show high thermal stability and good compactivity with PC, thus maintaining the good tensile strength of the matrix. Particularly, PAPZ@Fe enhances the thermal stability of PC by improving the initial degradation temperature by 8 °C and char yields by 36.8 % at 800 °C. The addition of 1.5 wt% PAPZ@Fe enables PC to achieve a desirable UL-94 V0 rating and a high limiting oxygen index of 31.6 %, in combination with a 36.3 % decrease in the peak heat release rate. This work offers a facile strategy for creating high-performance PC for practical application in industry.

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超分子阻燃剂使灭火聚碳酸酯具有增强的热稳定性和减少烟雾释放

制造机械坚固、耐热、阻燃的聚碳酸酯（PC）在工业中是非常可取的。不幸的是，由于它们的治理机制不同，实现如此全面的性能组合仍然具有挑战性。大多数阻燃剂以牺牲其他性能为代价提供令人满意的阻燃性。本文基于离子和金属与配体的配位相互作用，合理设计了三种含磷、氮和过渡金属元素的新型超分子阻燃剂（PAPZ@Co, PAPZ@La, PAPZ@Fe）。得益于π-π堆积和离子相互作用，这些超分子阻燃剂表现出较高的热稳定性和与PC的良好压实性，从而保持了基体的良好拉伸强度。特别是PAPZ@Fe提高了PC的热稳定性，在800 °C时，将初始降解温度提高了8 °C，炭产率提高了36.8% %。添加1.5 wt% PAPZ@Fe使PC能够达到理想的UL-94 V0等级和31.6% %的高极限氧指数，同时峰值放热率降低36.3% %。这项工作为创建实际应用于工业的高性能PC提供了一个简单的策略。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.