Tree trunks' outward growth expansion mimicked to 3D print polymer parts quickly/ efficiently without molds or expensive equipment

https://techxplore.com/news/2025-03-nature-3d-method-faster-bamboo.html

"Frontal ring-opening metathesis polymerization: pour amber-colored dicyclopentadiene liquid resin into open glass container submerged in ice water, heat resin center point to 70°C... heat radiates outward at 1 mm/s, >100X faster than home 3D printers, 60X faster than fastest-growing bamboo, hardening everything touched into growing sphere, self-sustaining... uses minimal energy... computational tool predicts rod's upward motion achieving target shape... wind turbine blades... limitations: curved objects, perfect cube"

Related: Composites Use In Wind/Energy Markets
https://www.compositesworld.com/topics/wind-energy