Abstract
Porous materials have good wave-absorbing and shock-absorbing effects, so it is one of the common measures to adopt them for explosion isolation in the field of safe transportation of hydrogen energy, but the need for filling inside the pipeline limit its application. In this paper, based on the structure-material coupling mechanism, the porous material is placed in the vacuum cavity structure. The explosion-proof performance of the polyurethane(PU) filled with different pore sizes and the composite material is investigated, which provides theoretical support and experimental basis for the application of porous material in the field of the explosion-proof. It is found that the coupling mechanism of "vacuum cavity - porous material" can effectively reduce the explosion pressure in the pipeline, and the smaller the pore size of the porous material, the stronger the effect of explosion isolation, and the maximum reduction in explosion pressure of 74 %. On this basis, the shear thickening gel (STG) and PU composite, give it the performance of impact hardening, and improved mechanical properties, the experimental results show that the composite material after the explosion isolation performance is stronger, the maximum explosion pressure attenuation of 87 %, the explosion isolation performance increased by 18 %.
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