Self-Healing Polyurethane/Fabric\nComposite with Puncture\nResistance Enabled by Phase Regulation and Matrix-Fiber Strengthening

To solve the problem of soft composites with high puncture\nresistance\nand self-healing at ambient temperature. A room-temperature self-healing\nthermoplastic polyurethane (TPU) coating was successfully synthesized\nthrough thoughtful phase modulation, and a type of puncture-resistant\ncomposite material was innovatively prepared by compositing TPU with\nhigh-performance aramid fabrics. The self-healing TPU coating formed\na strong matrix-fiber interface through intermolecular hydrogen bonding\n(H-bonds) with aramid fibers. Experimental results showed that the\nmaximum spike-puncture force and maximum knife-stab force of the composite\nwere 14.69 and 4.22 times higher than those of pure aramid fabrics,\nrespectively. And the self-healing efficiency of the spike stab resistance\nis as high as 44.91% and the self-healing efficiency of the knife\nstab is as high as 66.98% after 48h at 30 °C. Moreover, the room-temperature\ndynamics of the multiple dynamic bonds in this self-healing TPU coating\npositively affected the composite, which acquired an excellent ability\nto resist the damage inflicted by the knife-tip intrusion excellently.\nIn conclusion, this study provided methods of researching multifunctional\nindividual soft-stabbing protection equipment.