Preparation and performance study of low heat storage flame retardant polyurethane for coal mines

IF 6.4 2区工程技术 Q1 THERMODYNAMICS Case Studies in Thermal Engineering Pub Date : 2024-11-06 DOI:10.1016/j.csite.2024.105414

Haiyan Wang, Xiao Chen, Chengxiang Zou, Cheng Fan, Lei Chen, Mengen Zhao

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Abstract

In order to meet the requirements for the use of polyurethane for reinforcement in mines, the synthesis temperature of polyurethane needs to be lowered, and the flame-retardant and mechanical properties of polyurethane should also be considered comprehensively. Factors affecting the synthesis temperature of polyurethanes are investigated, low heat storage polyurethanes that meet the temperature requirements for use in plugging crushed coal bodies in coal mines are formulated, and the synthesized polyurethanes are characterised for their flame retardant properties by FTIR, SEM, TG-FTIR and CONE experiments. It was found that in this paper, a new type of polyurethane for coal mines was formed by flame retardant modification of polyurethane by adding nano-system flame retardant and phosphorus-system flame retardant, and the synthetic reaction temperature of the material could reach as low as 51.2 °C, and the pyrolysis onset temperature was increased to 286 °C. The experimental results show that the flame retardant property of this synthetic polyurethane has been significantly improved, and the heat accumulation effect of the synthesis process on the surrounding coal body has been greatly reduced. The physical properties and thermal stability of this synthetic polyurethane in the grouting process meet the safety requirements for use in underground coal mines.

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煤矿用低蓄热阻燃聚氨酯的制备和性能研究

为了满足矿井中使用聚氨酯加固的要求，需要降低聚氨酯的合成温度，同时还要综合考虑聚氨酯的阻燃性能和机械性能。本文研究了影响聚氨酯合成温度的因素，配制了符合煤矿堵塞破碎煤体温度要求的低蓄热聚氨酯，并通过傅立叶变换红外光谱、扫描电镜、TG-傅立叶变换红外光谱和 CONE 实验表征了合成聚氨酯的阻燃性能。研究发现，本文通过添加纳米体系阻燃剂和磷体系阻燃剂对聚氨酯进行阻燃改性，形成了一种新型煤矿用聚氨酯，该材料的合成反应温度最低可达 51.2 ℃，热解起始温度提高到 286 ℃。实验结果表明，这种合成聚氨酯的阻燃性能得到了明显改善，合成过程对周围煤体的蓄热效应也大大降低。这种合成聚氨酯在灌浆过程中的物理性能和热稳定性符合煤矿井下使用的安全要求。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.