Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 34, 2020
Previous Article Next Article

Mechanically robust and tough waterborne polyurethane films based on diselenide bonds and dual H-bonding interactions with fast visible-light-triggered room-temperature self-healability

Author affiliations

Abstract

Achieving the room-temperature self-healing of polymer materials with mechanically robust and tough features is a challenging project due to their conflicting attributes. Herein, a novel design concept of dynamic but mechanically robust and tough polymer networks was proposed derived from dynamic diselenide bonds and dual H-bonds, in which flexible fluorinated siloxane units and H-bonded urethane and urea groups are embedded simultaneously. Through adjustment of the mass fraction of fluorinated siloxane units incorporated, waterborne polyurethanes with good mechanical performances (tensile strength: 16.31 MPa; toughness: 69.8 MJ m−3) could be constructed. Meanwhile, this optimized sample could also be healed at room-temperature within 2 h under visible light. Therefore, the fast room-temperature self-healing of our elaborated polymers with mechanically robust and tough features is achieved, which has never been achieved for the contemporary polymer materials. The reconstruction of dual H-bonding interactions of urethane and urea moieties is responsible for the prophase healing after reconnecting the fracture surfaces, and macromolecular chains containing fluorinated siloxane units with excellent flexibility could promote the visible-light-triggered diselenide metathesis in a highly efficient manner subsequently. Moreover, much improved water resistance properties could also be achieved. The elaborated strategy will provide inspiration for developing mechanically robust and tough water-dispersed polymer materials with fast room-temperature self-repairing performance and desirable water resistance properties, which are of vital importance to the next generation of smart materials.

Graphical abstract: Mechanically robust and tough waterborne polyurethane films based on diselenide bonds and dual H-bonding interactions with fast visible-light-triggered room-temperature self-healability

Back to tab navigation

Supplementary files

Article information


Submitted
23 Jun 2020
Accepted
18 Jul 2020
First published
21 Jul 2020

Polym. Chem., 2020,11, 5463-5474
Article type
Paper

Mechanically robust and tough waterborne polyurethane films based on diselenide bonds and dual H-bonding interactions with fast visible-light-triggered room-temperature self-healability

W. Fan, Y. Jin and L. Shi, Polym. Chem., 2020, 11, 5463
DOI: 10.1039/D0PY00897D

Social activity

Search articles by author

Spotlight

Advertisements