Programmable photo-responsive self-healing hydrogels for optical information coding and encryption

[Display omitted] •A self-healing hydrogel consists of PAM, PAA, and PDMAEMA.•Mo7 endows the hydrogel with photochromic property.•Coumarin derivative endows the hydrogel with fluorescence property.•The hydrogel can be used for optical information coding and encryption. In this study, we proposed pro...

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Bibliographic Details
Published in:European polymer journal Vol. 166; p. 111025
Main Authors: Wang, Yufei, Chen, Zihao, Li, Nanshu, Zhang, Hanbing, Wei, Jie
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 05.03.2022
Elsevier BV
Subjects:
Ammonium molybdate
Coding
Coumarin
Data encryption
Electrostatics
Encryption
Fluorescence
Hydrogel
Hydrogels
Information coding
Medical coding
Photo-response
Photoluminescence
Polyacrylamide
Polyacrylic acid
Self-healing
Ultraviolet radiation
Wound healing
Fluorescence
Self-healing
Hydrogel
Photo-response
Information coding
Encryption
ISSN:0014-3057, 1873-1945
Online Access:Get full text
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Summary:[Display omitted] •A self-healing hydrogel consists of PAM, PAA, and PDMAEMA.•Mo7 endows the hydrogel with photochromic property.•Coumarin derivative endows the hydrogel with fluorescence property.•The hydrogel can be used for optical information coding and encryption. In this study, we proposed programmable photo-responsive self-healing hydrogels containing polyacrylamide (PAM), polyacrylic acid (PAA), poly[2-(dimethylamino) ethyl methacrylate] (PDMAEMA), ammonium molybdate (Mo7), and 7–2(acryloyl hydroxypropyl)-4-methyl-coumarin (AHPMC). Because of the electrostatic interaction of PAA and PDMAEMA, the hydrogel demonstrates good self-healing properties. Moreover, we introduced Mo7 and coumarin derivative in the hydrogel, respectively, which endows the hydrogel photo-responsive properties. Under the control of UV light, PAM-AD/Mo7 hydrogel with photochromic behavior could turn atrovirens, and PAM-AD/AC hydrogel with photoluminescent properties could emit blue fluorescence. In contrast, PAM-AD hydrogel possesses no photo-responsive behavior. Based on the self-healing and photo-responsive properties of the hydrogels, the three hydrogel blocks could be programmed and healed as a whole combination. In addition, we demonstrated the application of the hydrogel in optical information coding and encryption, which possesses good information coding and encryption effect. Therefore, the photo-responsive self-healing hydrogel may have potential applications in flexible information display and encryption fields.
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ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2022.111025