Fig. 1: Design and additive freeze-casting of decimeter-scale anisotropic aerogels.
From: Scalable anisotropic cooling aerogels by additive freeze-casting
a Schematics of the multiscale structures responsible for ultralow k and high solar reflectance of the anisotopic aerogel panel. b Schematics of the set-up and operating principle of the additive freeze-casting for the fabrication of decimeter-scale, anisotropic aerogel from BNNS/WPU colloidal solution. c Photograph and scanning electron microscope (SEM) images showing the uniform pore alignment and structural integrity of the aerogel. The SEM images were taken from the different spots in the pore alignment direction, showing the uniform pore diameters along the freezing direction and the seamless connection between adjacent blocks as indicated by an orange arrow. Scale bars: 50 µm. d Photographs of anisotropic aerogel panels of different dimensions fabricated using the additive freeze-casting. They are highly flexible to be rolled up for easy storage and transportation. Scale bars: 2 cm.
