Figure 1. Synthesis route and resulting PVPMS aerogels and xerogels.
2. Surface morphology and wettability
Figure 2. Porous structure and mechanical properties of PVPMS aerogels.
Figure 3. Porous structure and mechanical properties of PVPMS xerogels.
3. Adsorption and leakage resistance
Figure 4. Drying process, structure, compression and bending cycle performances, and machinability.
The aerogels and xerogels reported in this paper have low density combination (0.16-0.22 g cm-3), the pore size is homogeneous (most <60 nm), high specific surface area (900-1000 m2 g-1), high hydrophobicity (water contact angle > 130 degrees), and high transparency (> 80%), excellent machinability, super flexibility (withstanding 80% compression strain for 500 cycles), super elasticity (bending resistance for 100 cycles) and super insulation (λ = 15.0-15.4 mW m-1 K-1). The highly controllable double crosslinking method greatly enriches the preparation of porous materials and promotes the practical application of transparent high toughness aerogels in the field of super insulators.
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