Dual encryption of digital information in a tough fluorescent hydrogel

Type
Article

Authors
Liu, Yang
Li, Ming
Ju, Huaqiang
Wang, Zeju
Wu, Yitao
Wu, Zi Liang
Zhu, Huangtianzhi
Huang, Feihe

KAUST Grant Number
OSR-2019-CRG8-4032

Date
2022

Abstract
Hydrogels capable of shape-morphing and/or fluorescence modulation have practical significance in the field of anti-counterfeiting, while tough hydrogels with tunable fluorescence for multi-level encryptions have been rarely explored. Herein, we report a hydrogel P(DAE-co-AAc) for dual information encryption. The hydrogel is prepared by copolymerization of photoresponsive diarylethylene and acrylic acid, and it exhibits tunable mechanical properties and fluorescence. The soft hydrogel becomes tough when exposed to UV irradiation which induces dimerization of diarylethylene units, and thus information can be concealed by a folding-and-irradiation process. Tunable fluorescence upon irradiation enables photolithography for pattern encryption. Benefitting from reversible photo-decrosslinking, shape and emission recoveries can be realized, making the encryption material recyclable. We believe this work will be inspiring for the design of smart materials for information encryption.

Citation
Liu, Y., Li, M., Ju, H., Wang, Z., Wu, Y., Wu, Z. L., Zhu, H., & Huang, F. (2022). Dual encryption of digital information in a tough fluorescent hydrogel. Polymer Chemistry, 13(45), 6255–6260. https://doi.org/10.1039/d2py01295b

Acknowledgements
This work was supported by the National Key Research and Development Program of China (2021YFA0910100), the National Natural Science Foundation of China (22035006), the Zhejiang Provincial Natural Science Foundation of China (LD21B020001), the Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study (SN-ZJU SIAS-006), and the King Abdullah University of Science and Technology Office of Sponsored Research (OSR-2019-CRG8-4032).

Publisher
Royal Society of Chemistry (RSC)

Journal
POLYMER CHEMISTRY

DOI
10.1039/d2py01295b

Additional Links
http://xlink.rsc.org/?DOI=D2PY01295B

Permanent link to this record