In this study, a shear-stiffening composite porous material (PU@CS) was developed using the dipping-drying technique, with polyurethane (PU) as the substrate. PU@CS not only overcomes the cold flow drawbacks of shear-stiffening gel (SSG) but also significantly enhances the mechanical properties of PU (with a one-order-of-magnitude increase in maximum storage modulus). The introduction of multi-walled carbon nanotubes (MWCNTs) overcomes the electrostatic aggregation drawback of PU. Due to its outstanding shear hardening effect, PU@CS exhibits superior explosion-proof compared to PU, and when filled to a length of 50 cm, it achieves complete quenching of hydrogen gas explosion flames, with a maximum explosion overpressure attenuation ratio of 87.2%. This work provides data support for the application of SSG in the field of explosion protection.

中文翻译：

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具有冲击硬化功能的剪切硬化多孔材料：在氢爆炸安全防护中的应用

在这项研究中，采用浸渍干燥技术，以聚氨酯（PU）为基材，开发了一种剪切硬化复合多孔材料（PU@CS）。 PU@CS不仅克服了剪切硬化凝胶（SSG）的冷流缺点，而且显着增强了PU的机械性能（最大储能模量提高了一个数量级）。多壁碳纳米管（MWCNT）的引入克服了PU的静电聚集缺点。由于其优异的剪切硬化效果，PU@CS比PU表现出更优越的防爆性能，当填充到50cm长度时，可以实现氢气爆炸火焰的完全熄灭，最大爆炸超压衰减比为87.2% 。该工作为SSG在防爆领域的应用提供数据支持。