Phase change materials (PCMs) can optimize the thermal properties of fabric. Twelve kinds of microencapsulated phase change materials were selected, including four different phase change temperatures and three different content gradients. Twelve kinds of PCM‐coated fabrics were prepared by dry coating, and their basic physical properties were tested. The PCM‐coated fabric was added to the thermal protective fabric system as a comfortable layer. The thermal protective performance of the fabric system under two conditions of low‐level thermal radiation and fire exposure was analyzed through second‐degree burn time. The results showed that the incorporation of PCMs greatly improved the thermal protective performance of the fabric system under the low‐level thermal radiation, which was affected by the content, phase change temperature, mass per unit area and thermophysical properties of the coated fabric. In addition, the coated fabric by the PCMs was proved to be suitable for the condition of fire exposure, and greatly increased the thermal protective performance of the fabric system. The coated fabric with phase change temperature of 35°C and content of 45% showed the best thermal protective performance under both low‐level thermal radiation and fire exposure conditions.

中文翻译：

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包含相变材料的消防防护服在火灾环境中的热防护性能

相变材料（PCM）可以优化织物的热性能。选择了十二种微囊化相变材料，包括四种不同的相变温度和三种不同的含量梯度。通过干涂制备了十二种PCM涂层织物，并测试了其基本物理性能。将PCM涂层的织物作为舒适层添加到隔热织物系统中。通过二级燃烧时间分析了织物系统在低水平热辐射和明火两种条件下的热防护性能。结果表明，PCM的加入大大改善了织物系统在低水平热辐射下的热防护性能，受含量，相变温度，涂层织物的单位面积质量和热物理性质。另外，通过PCM涂覆的织物被证明适合暴露在火中，并大大提高了织物系统的热防护性能。相变温度为35°C，含量为45％的涂层织物在低水平热辐射和火源条件下均表现出最佳的热防护性能。