Nature-Inspired pH-Responsive Hydrogels with Rapid and High Contrast Changes in Color, Fluorescence, and Shape Simultaneously

Le-Ping Xiao; Lv-Ming Qiu; Zhen Wu; Guo-Jie Wang

doi:10.1007/s10118-024-3158-9

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Nature-Inspired pH-Responsive Hydrogels with Rapid and High Contrast Changes in Color, Fluorescence, and Shape Simultaneously

RESEARCH ARTICLE | Updated：2024-11-04

- Nature-Inspired pH-Responsive Hydrogels with Rapid and High Contrast Changes in Color, Fluorescence, and Shape Simultaneously
- Chinese Journal of Polymer Science Vol. 42, Issue 11, Pages: 1758-1767(2024)
- Affiliations：
  
  School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Author bio：
  
  wuzhen@ustb.edu.cn (Z.W.)
  guojie.wang@mater.ustb.edu.cn (G.J.W.)
- Funds：
- DOI：10.1007/s10118-024-3158-9
  CLC：
- Published：30 November 2024，
  
  Published Online：08 August 2024，
  
  Received：08 April 2024，
  
  Revised：05 May 2024，
  
  Accepted：08 May 2024
- Accepted：
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Xiao, L. P.; Qiu, L. M.; Wu, Z.; Wang, G. J. Nature-inspired pH-responsive hydrogels with rapid and high contrast changes in color, fluorescence, and shape simultaneously. Chinese J. Polym. Sci. 2024, 42, 1758–1767

Le-Ping Xiao, Lv-Ming Qiu, Zhen Wu, et al. Nature-Inspired pH-Responsive Hydrogels with Rapid and High Contrast Changes in Color, Fluorescence, and Shape Simultaneously. [J]. Chinese Journal of Polymer Science, 2024,42(11):1758-1767.
Xiao, L. P.; Qiu, L. M.; Wu, Z.; Wang, G. J. Nature-inspired pH-responsive hydrogels with rapid and high contrast changes in color, fluorescence, and shape simultaneously. Chinese J. Polym. Sci. 2024, 42, 1758–1767 DOI： 10.1007/s10118-024-3158-9.

Le-Ping Xiao, Lv-Ming Qiu, Zhen Wu, et al. Nature-Inspired pH-Responsive Hydrogels with Rapid and High Contrast Changes in Color, Fluorescence, and Shape Simultaneously. [J]. Chinese Journal of Polymer Science, 2024,42(11):1758-1767. DOI： 10.1007/s10118-024-3158-9.

摘要

An intelligent pH-responsive hydrogel with remarkably rapid and high contrast changes is reported. Under stimuli

its color varies from yellow to red within 120 s. Moreover

the fluorescent intensity changes by 50% within 30 s and the shape shrinks significantly. Furthermore

the hydrogel has been successfully applied in the fields of biomimicry

camouflage

and multistage information encryption.

Abstract

To realize single-stimulus-induced simultaneous multi-behaviors in hydrogels is still quite challenging nowadays. Herein

an intelligent pH-responsive hydrogel (BP4VA/PAS) with rapid and high contrast changes in color

fluorescence

and shape simultaneously is reported. The BP4VA/PAS hydrogel is fabricated by incorporating styryl anthracene derivative (BP4VA) into copolymer networks (PAS) of acrylamide and sodium 4-styrene sulfonate. Under acid conditions

the protonation of BP4VA generates a rapid change with high color contrast from yellow to red and a fluorescence switch between bright green and weak red emission. At the sa

me time

the electrostatic interactions between 2H-BP4VA

and sulfonate anions suspended on PAS trigger BP4VA/PAS hydrogels to shrink. Upon alkaline treatment

the 2H-BP4VA

/PAS hydrogel deprotonates and recovers to its original color

fluorescence

and shape. Furthermore

utilizing rapid and remarkable pH-responsive properties of BP4VA/PAS hydrogels

we successfully demonstrated its applications in biomimicry

camouflage

and multistage information encryption. Collectively

this work provided an elegant strategy to develop intelligent hydrogels in applications of biomimetic smart materials and information encryption.

关键词

Keywords

pH-responseFluorescenceHydrogelsBioinspired functionInformation encryption

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