Issue 41, 2020

Self-healable transparent polymer/salt hybrid adhesive via a ternary bonding effect

Abstract

Tremendous attention has been focused on the design and fabrication of intrinsic self-healing materials in recent years; however, the fabrication of self-healing materials with high transparency and high adhesion strength is still a challenge. Here, we develop a novel transparent self-healing adhesive with multiple functions by simply blending poly(2-ethyl-2-oxazoline) (PEOZ), poly(4-hydroxy styrene) (PHS), and CaCl2, and discover that the anion Cl also plays a significant role in accelerating the self-healing process by anion–ligand coordination in the form of hydrogen bonding, which has been seriously neglected in previous work. Unlike the common single metal–ligand coordination approach, the enhancement of self-healing results from novel co-existing ternary bridging bonds: metal–ligand coordination, ionic bond, and anion coordination. The universality of the new concept has been verified with other typical soluble salts MgCl2, NaCl, and Ca(NO3)2, providing a new dimension in the comprehension of the self-healing mechanisms. As a result, the hybrid shows outstanding multifunctional performance compared with the most recently published self-healable adhesives taking into consideration the transparency (T550 = 98.9%), adhesion strength (2.57 MPa), and self-healing efficiency (91%), enabling its application as an optical material, an adhesive and also a conservation material for cultural heritage.

Graphical abstract: Self-healable transparent polymer/salt hybrid adhesive via a ternary bonding effect

Supplementary files

Article information

Article type
Paper
Submitted
16 7 2020
Accepted
30 9 2020
First published
30 9 2020

J. Mater. Chem. A, 2020,8, 21812-21823

Self-healable transparent polymer/salt hybrid adhesive via a ternary bonding effect

Y. Zhang, K. Zhang, X. Li, T. Li, Q. Ye, L. Tan and B. Wei, J. Mater. Chem. A, 2020, 8, 21812 DOI: 10.1039/D0TA06935C

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