A fully bio-based intumescent flame retardant for enhancing the flame retardancy and smoke suppression properties of wood flour polypropylene composites

IF 6.3 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2024-11-13 DOI:10.1016/j.polymdegradstab.2024.111072

Jinghang Zhu , Yiqun Fang , Ruofan Yang , Yiqing Fu , Guoqing Li , Xiaoyan Bai , Weihong Wang , Yongming Song , Qingwen Wang

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Abstract

In this study, a fully bio-based intumescent flame retardant, phytic acid vanillin arginine salt (VR-PA), was designed and synthesized by l-arginine (AR) and vanillin (VA) via a Schiff base reaction, followed by the introduction of phytic acid (PA) using electrostatic ionic interactions. The intumescent flame retardant, VR-PA, was incorporated into wood flour polypropylene composites (WFPP) to enhance their flame retardant and smoke suppression properties. Compared to pure WF, the limiting oxygen index (LOI) of WFPP with 20 wt% VR-PA increased to 28.2 %, while the peak heat release rate and total heat release were reduced by 35.4 % and 20.6 %, respectively. Additionally, the WF with 15 wt% VR-PA exhibited the greatest reduction in total smoke production, with a significant decrease of 42.1 %. The improved flame retardant and smoke suppression performance of the WF is attributed to the free radical trapping effect of VR-PA in the gas phase during the combustion process, as well as the formation of an expanded and continuous carbon layer during in the condensed phase. This study provides a green method to enhance the flame retardancy and smoke suppression of WFPP composites.

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用于增强木粉聚丙烯复合材料阻燃性和抑烟性能的全生物基膨胀型阻燃剂

本研究设计并合成了一种完全生物基的膨胀型阻燃剂--植酸香兰素精氨酸盐（VR-PA），它由 l-精氨酸（AR）和香兰素（VA）通过希夫碱反应合成，然后利用静电离子相互作用引入植酸（PA）。在木粉聚丙烯复合材料（WFPP）中加入膨胀阻燃剂 VR-PA，以增强其阻燃和抑烟性能。与纯木粉相比，含有 20 wt% VR-PA 的 WFPP 的极限氧指数（LOI）提高到 28.2%，峰值放热率和总放热量分别降低了 35.4% 和 20.6%。此外，含有 15 wt% VR-PA 的 WF 在总产烟量方面的降幅最大，显著降低了 42.1%。WF 阻燃和抑烟性能的提高归功于 VR-PA 在燃烧过程中对气相中自由基的捕获作用，以及在冷凝相中形成的膨胀和连续碳层。这项研究为提高 WFPP 复合材料的阻燃性和抑烟性能提供了一种绿色方法。

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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.