Back to Search Start Over

A Photopatternable Conjugated Polymer with Thermal-Annealing-Promoted Interchain Stacking for Highly Stable Anti-Counterfeiting Materials.

Authors :
Liu C
Steppert AK
Liu Y
Weis P
Hu J
Nie C
Xu WC
Kuehne AJC
Wu S
Source :
Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2023 Sep; Vol. 35 (36), pp. e2303120. Date of Electronic Publication: 2023 Jul 21.
Publication Year :
2023

Abstract

Photoresponsive polymers can be conveniently used to fabricate anti-counterfeiting materials through photopatterning. However, an unsolved problem is that ambient light and heat can damage anti-counterfeiting patterns on photoresponsive polymers. Herein, photo- and thermostable anti-counterfeiting materials are developed by photopatterning and thermal annealing of a photoresponsive conjugated polymer (MC-Azo). MC-Azo contains alternating azobenzene and fluorene units in the polymer backbone. To prepare an anti-counterfeiting material, an MC-Azo film is irradiated with polarized blue light through a photomask, and then thermally annealed under the pressure of a photonic stamp. This strategy generates a highly secure anti-counterfeiting material with dual patterns, which is stable to sunlight and heat over 200 °C. A key for the stability is that thermal annealing promotes interchain stacking, which converts photoresponsive MC-Azo to a photostable material. Another key for the stability is that the conjugated structure endows MC-Azo with desirable thermal properties. This study shows that the design of photopatternable conjugated polymers with thermal-annealing-promoted interchain stacking provides a new strategy for the development of highly stable and secure anti-counterfeiting materials.<br /> (© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.)

Details

Language :
English
ISSN :
1521-4095
Volume :
35
Issue :
36
Database :
MEDLINE
Journal :
Advanced materials (Deerfield Beach, Fla.)
Publication Type :
Academic Journal
Accession number :
37257837
Full Text :
https://doi.org/10.1002/adma.202303120