This report describes a novel method to produce fluffy and resilient nanotube aerogels by combining solution blow spinning and Atom Layer Deposition (ALD). Polyvinylpyrrolidone (PVP) sponges obtained by blow spinning are used as templates and are deposited in ALD. After removal of template, semitransparent aerogels whose density can be as low as 0.68 mg/cm³ were obtained. The product is heat-stable, with the ability to retain original shape and keep elastic after being kept at 900°C for 2 hours. It is also heat-insulated, with a thermal conductivity of 0.022 W/K∙m at room temperature. Additionally, when compressed to 60% of the original height for 100 cycles during in-situ mechanical test, the sponges recovered to around 80% of the original shape, further indicating excellent mechanically elasticity of the aerogel.

中文翻译：

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超低导热的Al2O3纳米管气凝胶，导热系数低

该报告描述了一种通过结合溶液吹纺和原子层沉积（ALD）来生产蓬松且有弹性的纳米管气凝胶的新颖方法。通过吹纺获得的聚乙烯吡咯烷酮（PVP）海绵用作模板，并沉积在ALD中。除去模板后，密度可低至0.68 mg / cm ^3的半透明气凝胶获得了。该产品是热稳定的，在900°C下放置2小时后能够保持原始形状并保持弹性。它也是隔热的，在室温下的热导率为0.022 W / K∙m。另外，当在原位机械测试期间压缩至原始高度的60％并进行100次循环时，海绵恢复到原始形状的80％左右，进一步表明气凝胶具有出色的机械弹性。