石墨烯聚氨酯构筑煤矿临时密闭墙试验研究

为解决传统矿用通风构筑物材料质量沉重、构筑低效的难题,研发一种新型石墨烯聚氨酯泡沫,测试其各项通风构筑物的性能。首先使用一步法制备新型石墨烯聚氨酯泡沫,然后通过塑料薄膜和薄片气体透过性试验测试材料的密闭性,最后利用综合热分析仪、傅里叶变换红外光谱仪、金相显微镜等分析材料的结构。结果表明:所制备的新型石墨烯聚氨酯泡沫材料密度仅40 kg/m3;红外光谱显示富含C=C、C=O、-OH、-CO、-NH等有机官能团;金相显微镜观察得到160μm尺寸泡沫分布均匀稳定。新型石墨烯聚氨酯泡沫材料在模拟试验30天内材料保持高效密闭性,在400℃以内有着优良的热稳定性,离火0. 13 s内自熄,作为矿井临时通风构筑物可以减少使用过程中火灾风险的发生。

Experimental research on temporary closed wall constructed by graphene polyurethanen in coal mine

In order to address problems of heavy materials and inefficient construction of traditional mine ventilation structures,a new type of graphene polyurethane foam was developed and its performance for various structures was tested. Firstly,new graphene polyurethane foam was prepared using one-step method. Then,its hermeticity was tested through gas permeability experiments of plastic films and sheets.Finally,its structures were analyzed by using a comprehensive thermal analyzer,a Fourier transform infrared spectrometer and a metallographic microscope. The results show that the density of new graphene polyurethane foam is only 40 kg/m^3. Infrared spectrum shows that it is rich in organic functional groups such as C = C,C = O,-OH,-CO and-NH,and based on observation of metallurgical microscope,distribution of 160 μm foam is uniform and stable. And the new material remains highly efficient and hermetic within 30 days of simulation test,maintains excellent thermal stability within 400 ℃,and can extinguish within 0. 13 s from fire,thus reducing fire risks during its use as a temporary ventilation structure in the mine.