Yang Ruizhe, Hu Feng, An Lu, Armstrong Jason, Hu Yong, Li Changning, Huang Yulong, Ren Shenqiang
Department of Mechanical and Aerospace Engineering , University at Buffalo, The State University of New York , Buffalo , New York 14260 , United States.
Department of Chemistry , University at Buffalo, The State University of New York , Buffalo , New York 14260 , United States.
Nano Lett. 2020 Feb 12;20(2):1110-1116. doi: 10.1021/acs.nanolett.9b04411. Epub 2020 Jan 3.
Light-weight ceramic aerogels hold promise for superinsulation. However, its mechanical instability and complex manufacturing hampered its technical applications. In this study, we demonstrate lightweight pore-gradient ceramic aerogel-like foam monoliths (PGAFoams) through one-pot and in situ bubble supported pore gradient formation. The mechanically strong PGAFoams exhibit a low thermal conductivity of 0.036 W m K and a compressive strength of 89.85 MPa. The pore gradient and integral ceramic monolith nature provides such hydrophobic PGAFoams with thermal management, robust soundproof, and fire-resistance performance. Highly machinable PGAFoams can be adapted into a variety of shapes and dimensions to accommodate complex geometry applications. The scalable manufacturing of lightweight PGAFoams opens up building insulation with remarkable thermal management, high mechanical strength, low mass density, superior soundproofing, and fire-retardant performances.
轻质陶瓷气凝胶有望实现超级隔热。然而，其机械不稳定性和复杂的制造工艺阻碍了其技术应用。在本研究中，我们通过一锅法原位气泡支撑孔梯度形成，展示了轻质孔梯度类陶瓷气凝胶泡沫整体材料（PGAFoams）。机械强度高的PGAFoams具有0.036 W m K的低热导率和89.85 MPa的抗压强度。孔梯度和整体陶瓷整体材料特性为这种疏水性PGAFoams提供了热管理、强大的隔音和防火性能。高度可加工的PGAFoams可以制成各种形状和尺寸，以适应复杂的几何应用。轻质PGAFoams的可扩展制造为建筑隔热开辟了道路，具有卓越的热管理、高机械强度、低质量密度、优异的隔音和阻燃性能。
