1. Aerogel Finishing A Nanoporous Thermal Obstacle
Aerogel insulation layer is an innovation product born from the strange physics of aerogels– ultralight solids made from 90% air entraped in a nanoscale permeable network. Visualize “frozen smoke”: the little pores are so little (nanometers wide) that they stop heat-carrying air molecules from relocating easily, killing convection (heat transfer through air flow) and leaving just marginal transmission. This gives aerogel coverings a thermal conductivity of ~ 0.013 W/m · K, far lower than still air (~ 0.026 W/m · K )and miles better than traditional paint (~ 0.1– 0.5 W/m · K).
(Aerogel Coating)
Making aerogel finishings begins with a sol-gel process: mix silica or polymer nanoparticles right into a liquid to form a sticky colloidal suspension. Next, supercritical drying out removes the fluid without falling down the breakable pore structure– this is crucial to maintaining the “air-trapping” network. The resulting aerogel powder is mixed with binders (to stick to surface areas) and additives (for toughness), then used like paint through splashing or brushing. The final movie is thin (typically
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