GoKawiilVirginia Tech lab 3D prints liquid-metal silicone composite for directional heat flow
A Virginia Tech graduate student, Hugh Grennan, demonstrated a printable composite made by mixing eutectic gallium-indium liquid metal into uncured PDMS silicone, shown on the 3D Printing Nerd YouTube channel. The mixture forms tiny liquid-metal droplets encased in silicone that stay conductive even after being cut, and when printed on a syringe-fed 3D printer, the droplets can be stretched into elongated shapes that channel heat in a chosen direction.