Materials possessing sufficient strength, exceptional thermal insulation, and energy-efficient characteristics are in short supply within the construction industry. Foamed concrete, known for its cost-effectiveness, ultralight composition, and prominent thermal insulation characteristics, has displayed significant potential in applications geared towards enhancing energy efficiency. Nevertheless, its widespread adoption is hindered because, at present, the strength and thermal insulation properties of foamed concrete fail to meet engineering requirements due to inadequate foam stability. In response to this challenge, an ultra-stable foam with a multi-walled core-shell structure is successfully synthesized by modifying the gas-liquid interface through coupling the synergistic effects of surfactant, Janus-ZrO nanoparticles, and hydrophilic homogeneous SiO. Utilizing the innovative approach, we incorporate the ultra-stable foam, containing 5 wt% Janus-ZrO nanoparticles, in the fabrication of foamed concrete with a resultant density of 500 kg m. Notably, this foamed concrete exhibits remarkable mechanical properties (compressive strength of 5.1 MPa) and outstanding thermal insulation performance (thermal conductivity of 0.091 W/(m·K)). These enhancements can be attributed to the refining of the pore structure and an increased proportion of closed pores within the foamed concrete, both facilitated by the utilization of the ultra-stable foam. The introduction of this unique ultra-stable foam is poised to expand the applications of foamed concrete in the construction sector.

中文翻译：

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采用两亲性和亲水性颗粒稳定的超稳定泡沫制成的高性能泡沫混凝土


具有足够强度、卓越隔热和节能特性的材料在建筑行业中供不应求。泡沫混凝土以其成本效益、超轻成分和突出的隔热特性而闻名，在提高能源效率的应用中显示出巨大的潜力。然而，目前泡沫混凝土的强度和保温性能由于泡沫稳定性不足而无法满足工程要求，其广泛应用受到阻碍。针对这一挑战，通过耦合表面活性剂、Janus-ZrO纳米粒子和亲水均质SiO的协同作用，通过改性气液界面，成功合成了具有多壁核壳结构的超稳定泡沫。利用创新方法，我们将含有 5 wt% Janus-ZrO 纳米颗粒的超稳定泡沫融入泡沫混凝土的制造中，最终密度为 500 kg m。值得注意的是，这种泡沫混凝土表现出卓越的机械性能（抗压强度为5.1 MPa）和出色的隔热性能（导热系数为0.091 W/（m·K））。这些增强可归因于泡沫混凝土中孔隙结构的细化和闭孔比例的增加，这两者都是通过使用超稳定泡沫来促进的。这种独特的超稳定泡沫的推出有望扩大泡沫混凝土在建筑领域的应用。