Microfabrication of Tough PET Fiber

Inspiring by natural fibers and microstructures such as spider silk and bone, several efforts have been made to increase toughness of fibers via adding some sacrificial bonds to them. In the current work, we have used Liquid rope coiling instability phenomenon to produce such bonds onto Polyethylene Terephthalate (PET) fibers with the aid of vertical extrusion leading to tougher polymer fiber. Depending on different processing conditions, different toughness values compared to that of straight fiber were obtained