Polyurea for anti-corrosion and wear-resistant enhancement
Highly dispersed nanofibers with continuous strengthening interface can enhance the anticorrosion and wear resistance of traditional waterborne epoxy resin. Now, polyurea nanofibers with ~50 nm in diameter were synthesised by addition polymerisation of methylene diphenyl diisocyanate and organic amine.
The impedance of as-prepared composite coating is increased by almost four times, providing long-lasting protection even in harsh environments. Meanwhile, the polyurea nanofibers with 0.25 wt% can greatly improve the wear resistance of coating up to 73.2 %, indicating that the inevitable wear in service has been dealt well. The anti-wear capacity of composite coating is derived from the entangled polyurea nanofibers transmitting the force of the contact surface and dimensional resistance to prevent coating displacement.
The study has been published in Progress in Organic Coatings, Volume 171, October 2022.