The coupling effects of humidity‐heat on the thermal protective performance of protective clothing play an important role during the fire fighting process. The thermal stability, heat release, and thermal protective performance of protective clothing were investigated under the coupling effects of humidity‐heat condition. The cone calorimeter and the thermogravimetric analysis (hereinafter referred to as TGA) were adopted to investigate the thermal stability and heat release characteristics of protective clothing. The thermal protective performance tester and heat flux meter 8 (hereinafter referred to as HFM‐8) multichannel heat flow meter were adopted to simulate the multiple effects of internal sweating, external water spray and high thermal radiation. As for the thermal protective performance experiment (hereinafter referred to as TPP) results, it is found that the proper moisture content can significantly enhance the thermal protective performance, but the performance is seriously degraded after soaking, which is due to the improved thermal conductivity. The mechanism of microscopic changes of protective clothing were also investigated by hot‐stage polarizing microscope and scanning electron microscope. The results of this experiment have important practical guiding significance for the safety protection of firefighters during the fire extinguishing processes.

中文翻译：

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湿热耦合对消防防护服防护性能的影响研究

湿热耦合对防护服热防护性能的影响在灭火过程中起着重要作用。在湿热条件下，研究了防护服的热稳定性，散热性和热防护性能。采用锥形量热仪和热重分析法（以下简称TGA）研究防护服的热稳定性和放热特性。采用热防护性能测试仪和热通量计8（以下称为HFM-8）多通道热流量计来模拟内部出汗，外部喷水和高热辐射的多重影响。至于热防护性能实验（以下简称TPP）的结果，已经发现适当的水分含量可以显着提高热防护性能，但是由于浸泡后导热性能的提高，其性能严重下降。还通过热台偏振镜和扫描电子显微镜研究了防护服的微观变化机理。实验结果对灭火过程中消防人员的安全防护具有重要的实践指导意义。还通过热台偏振镜和扫描电子显微镜研究了防护服的微观变化机理。实验结果对灭火过程中消防人员的安全防护具有重要的实践指导意义。还通过热台偏振镜和扫描电子显微镜研究了防护服的微观变化机理。实验结果对灭火过程中消防人员的安全防护具有重要的实践指导意义。