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

IF 4.1 2区化学 Q2 POLYMER SCIENCE Chinese Journal of Polymer Science Pub Date : 2024-08-08 DOI:10.1007/s10118-024-3158-9

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

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引用次数: 0

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 same time, the electrostatic interactions between 2H-BP4VA²⁺ and sulfonate anions suspended on PAS trigger BP4VA/PAS hydrogels to shrink. Upon alkaline treatment, the 2H-BP4VA²⁺/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.

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受大自然启发的 pH 值响应型水凝胶可同时快速、高对比度地改变颜色、荧光和形状

如今，在水凝胶中实现单次刺激同时诱导多种行为仍具有相当大的挑战性。本文报告了一种智能 pH 响应水凝胶（BP4VA/PAS），该水凝胶可同时快速、高对比度地改变颜色、荧光和形状。BP4VA/PAS 水凝胶是将苯乙烯基蒽衍生物（BP4VA）加入丙烯酰胺和对苯乙烯磺酸钠的共聚物网络（PAS）中制成的。在酸性条件下，BP4VA 的质子化会产生从黄色到红色的快速变化，颜色对比度高，荧光在亮绿色和弱红色发射之间切换。与此同时，悬浮在 PAS 上的 2H-BP4VA2+ 与磺酸阴离子之间的静电作用会引发 BP4VA/PAS 水凝胶收缩。经碱性处理后，2H-BP4VA2+/PAS 水凝胶去质子化，恢复到原来的颜色、荧光和形状。此外，利用 BP4VA/PAS 水凝胶快速而显著的 pH 响应特性，我们成功地展示了它在生物仿生、伪装和多级信息加密方面的应用。总之，这项工作为开发智能水凝胶在仿生智能材料和信息加密方面的应用提供了一种优雅的策略。

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来源期刊

Chinese Journal of Polymer Science 化学-高分子科学

CiteScore

7.10

自引率

11.60%

发文量

218

审稿时长

6.0 months

期刊介绍： Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.