Key Laboratory of Materials Chemistry for Energy Conversion and Storage of the Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Key Laboratory of Rare Mineral Exploration and Utilization, Ministry of Land and Resources, Geological Experimental Testing Center of Hubei Province, Wuhan 430034, China.
ACS Appl Mater Interfaces. 2020 Jun 24;12(25):28539-28549. doi: 10.1021/acsami.0c06674. Epub 2020 Jun 15.
In this work, we reported a multi-responsive luminescent hydrogel with properties of encryption, naked eye sensing of glucose, shape memory, self-healing, and antibacterial activity. The hydrogel (GA/CCS/DNSA/Eu) was obtained by mixing phenylboronic acid-modified gelatin (GA-DBA), catechol-modified carboxymethyl chitosan (CCS-PCA), 3,5-dinitrosalicylic acid (DNSA), and Eu ions through a facile heating-cooling process. The resultant hydrogel exhibits reversible luminescence and color and phase changes in response to temperature, acid/base, salt, and redox stimuli. Based on the multiple responsiveness, information encryption and decryption, naked eye sensing of glucose, remarkable shape memory, and enhanced mechanical properties of the as-prepared hydrogel were realized. In addition, the self-healing capacity was also achieved due to the dynamic bonds in GA/CCS/DNSA/Eu hydrogels. Specifically, the GA/CCS/DNSA/Eu hydrogels possess antibacterial activity owing to the bacteriostasis of the CCS-PCA and DNSA/Eu complex. Thus, GA/CCS/DNSA/Eu hydrogels have potential applications in the fields of anticounterfeiting, wearable devices, biomedicine, sensing, etc.
在这项工作中，我们报道了一种具有加密、葡萄糖肉眼感应、形状记忆、自修复和抗菌活性的多响应发光水凝胶。该水凝胶（GA/CCS/DNSA/Eu）通过混合苯硼酸修饰明胶（GA-DBA）、邻苯二酚修饰羧甲基壳聚糖（CCS-PCA）、3,5-二硝基水杨酸（DNSA）和 Eu 离子，通过简单的加热-冷却过程获得。所得水凝胶表现出对温度、酸碱、盐和氧化还原刺激的可逆发光和颜色以及相变化。基于多种响应性，实现了信息加密和解密、葡萄糖的肉眼感应、显著的形状记忆和增强的水凝胶机械性能。此外，由于 GA/CCS/DNSA/Eu 水凝胶中的动态键，还实现了自修复能力。具体而言，由于 CCS-PCA 和 DNSA/Eu 配合物的抑菌作用，GA/CCS/DNSA/Eu 水凝胶具有抗菌活性。因此，GA/CCS/DNSA/Eu 水凝胶在防伪、可穿戴设备、生物医学、传感等领域具有潜在的应用。
