Issue 87, 2014

Novel design approaches for multifunctional information carriers


Two design approaches for multifunctional information carriers are introduced. In the first one, quick response (QR) code carriers, which were composed of poly(ester urethane) (PEU) and microencapsulated thermochromic pigments (T-PIGs), differing in color and color switching temperature (CST), were prepared. The obtained material systems exhibited machine-readable QR codes at 23 °C and a two-stage decolorization when heated, culminating in unreadable QR codes at temperatures above the highest CST of the employed T-PIGs. In the second scenario, information carriers were sealed with a dark, thermochromic PEU layer. As a result, the QR codes were hidden at 23 °C and became readable upon heating due to color fading. Beyond the characterization of the employed components, preparation methods, functionality analyses and durability investigations are reported. When heated after thermo-mechanical programming, pronounced shape memory properties could be verified. The thermo-responsiveness of such multifunctional material systems may qualify them for usage in anti-counterfeiting applications.

Graphical abstract: Novel design approaches for multifunctional information carriers

Supplementary files

Article information

Article type
20 Aug 2014
17 Sep 2014
First published
26 Sep 2014
This article is Open Access
Creative Commons BY license

RSC Adv., 2014,4, 46680-46688

Author version available

Novel design approaches for multifunctional information carriers

M. Ecker and T. Pretsch, RSC Adv., 2014, 4, 46680 DOI: 10.1039/C4RA08977D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity