High strength and high toughness are vital for fibers’engineering applications,but are hard to simultaneously achieve.Herein,we synthesize a carbon nanotube(CNT)-thermoplastic polyurethanes(TPU)fiber reinforced by an...High strength and high toughness are vital for fibers’engineering applications,but are hard to simultaneously achieve.Herein,we synthesize a carbon nanotube(CNT)-thermoplastic polyurethanes(TPU)fiber reinforced by an amorphous ZrO_(2)layer through the wet-spinning method.The amorphous ZrO_(2)layer is in-situ grown on the surface of CNT and the hybrid nanowires are orientedly aligned with TPU to form the ternary fiber.The fiber possesses an excellent combination of high strength(84.6 MPa)and toughness(126.7 MJ/m^(3)),which is outstanding when compared with previously reported CNT-TPU fibers.The pull-out of nanowires attributed to the oriented alignment structure and the enhanced interface and restriction of deformation obtained from the amorphous ZrO_(2)layer are considered as the primary strengthening and toughening mechanisms.We anticipate that our fiber synthesis strategy gives a new path to design strong and tough fibers.展开更多
基金This work was supported by the National Key R&D Program of China(Nos.2020YFA0710403,2020YFA0710404)the National Natural Science Foundation of China(Nos.52073008,U1910208).
文摘High strength and high toughness are vital for fibers’engineering applications,but are hard to simultaneously achieve.Herein,we synthesize a carbon nanotube(CNT)-thermoplastic polyurethanes(TPU)fiber reinforced by an amorphous ZrO_(2)layer through the wet-spinning method.The amorphous ZrO_(2)layer is in-situ grown on the surface of CNT and the hybrid nanowires are orientedly aligned with TPU to form the ternary fiber.The fiber possesses an excellent combination of high strength(84.6 MPa)and toughness(126.7 MJ/m^(3)),which is outstanding when compared with previously reported CNT-TPU fibers.The pull-out of nanowires attributed to the oriented alignment structure and the enhanced interface and restriction of deformation obtained from the amorphous ZrO_(2)layer are considered as the primary strengthening and toughening mechanisms.We anticipate that our fiber synthesis strategy gives a new path to design strong and tough fibers.
