Issue 6, 2020

Mechanically and thermo-driven self-healing polyurethane elastomeric composites using inorganic–organic hybrid material as crosslinker

Abstract

Intrinsic healing materials based on reversible bonds possessing the unique adaptive properties of self-healing and recyclability have attracted considerable attention. One of the major challenges in intrinsic healing materials that remains is how to reinforce the mechanical property without sacrificing healing efficiency. Here, furfuryl-modified silica particles (furan@SiO2) with high functional group grafting ratio and dispersibility, formed by sol–gel process, were introduced into the maleimide-terminated polyurethane (mPU) elastomer to establish a thermo-reversible organic–inorganic network based on Diels–Alder reaction between furan@SiO2 and mPU. The modulus and strength of the elastomeric composites were significantly enhanced compared to neat mPU. Due to the reversible crosslinking points and organic–inorganic network, the thermo-reversible polyurethane elastomeric composites maintained favourable mechanical properties with excellent thermo-driven self-healing efficiency. Moreover, the corresponding elastomeric composites retained high repair efficiency after multiple healing processes. Furthermore, the thermo-reversible polyurethane elastomeric composites could be recycled via solution casting and hot-pressing due to the thermally reversible cross-linking point. Such excellent combination of mechanical and self-healing performance reveals the potential of this new approach in designing self-healing hybrid materials with tunable structures and mechanical properties.

Graphical abstract: Mechanically and thermo-driven self-healing polyurethane elastomeric composites using inorganic–organic hybrid material as crosslinker

Supplementary files

Article information

Article type
Paper
Submitted
10 Oct 2019
Accepted
05 Dec 2019
First published
06 Dec 2019

Polym. Chem., 2020,11, 1161-1170

Mechanically and thermo-driven self-healing polyurethane elastomeric composites using inorganic–organic hybrid material as crosslinker

S. Yang, S. Wang, X. Du, X. Cheng, H. Wang and Z. Du, Polym. Chem., 2020, 11, 1161 DOI: 10.1039/C9PY01531K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements