Schiff base fluorescent hydrogel containing acylhydrazone structure and pyridine ring with multifunction

Jinde He; Ye Yuan; Liuyan TangJinqing Qu

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Schiff base fluorescent hydrogel containing acylhydrazone structure and pyridine ring with multifunction

机译：Schiff base fluorescent hydrogel containing acylhydrazone structure and pyridine ring with multifunction

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In order to prepare multifunctional fluorescent hydrogel (FH), functional Schiff base ligands have been incorporated into polymer networks. We reported here a novel multifunctional Schiff base functionalized FH, P(AM‐PEGA‐PEPMA), and its corresponding metallohydrogel, Zn2+‐P(AM‐PEGA‐PEPMA), which exhibited tunable fluorescence intensity, self‐healing ability, stretchability, and shape‐memory property. P(AM‐PEGA‐PEPMA) was obtained by one‐pot micellar copolymerization and Zn2+‐P(AM‐PEGA‐PEPMA) was formed by metal coordination between Schiff base ligand (PEPMA) and Zn2+. Zn2+‐P(AM‐PEGA‐PEPMA) hydrogel was obtained after cross‐linking by the PEPMA‐Zn2+ metal coordination, whose maximum tensile strain can reach over 900%. The fluorescent intensity of Zn2+‐P(AM‐PEGA‐PEPMA) hydrogel gradually increased with the increase of Zn2+ concentration ([Zn2+]). When [Zn2+] was 0.1 M, it could reach to 400% of the original fluorescence intensity. The reversible fluorescence change of hydrogel can be controlled by Zn2+ together with pH. What's more, the Zn2+‐P(AM‐PEGA‐PEPMA) hydrogel has the ability to self‐heal within a minute at room temperature. The shape of the P(AM‐PEGA‐PEPMA) hydrogel was memorized/restored by the forming/breaking the metal coordination between PEPMA and Fe3+. With above properties, P(AM‐PEGA‐PEPMA) hydrogel and Zn2+‐P(AM‐PEGA‐PEPMA) hydrogel are expected to be applied for encryption, flexible sensors and soft wearable devices.

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来源
《Polymers for advanced technologies》 |2022年第5期|1385-1393|共9页
作者
Jinde He; Ye Yuan; Liuyan TangJinqing Qu;
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作者单位

South China University of Technology;

Wuyi University;

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原文格式 PDF
正文语种英语
中图分类高分子化合物工业（高聚物工业）;有机化学;
关键词
acylhydrazone and pyridine; fluorescent hydrogel; Schiff base ligand; self‐healing; shape‐memory;

Schiff base fluorescent hydrogel containing acylhydrazone structure and pyridine ring with multifunction

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