Co2+-Mediated Hydrogels with Enhanced Mechanical Properties for Flexible Sensing,ACS Applied Polymer Materials

当前位置： X-MOL 学术 › ACS Appl. Polym. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Co2+-Mediated Hydrogels with Enhanced Mechanical Properties for Flexible Sensing
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2022-08-08 , DOI: 10.1021/acsapm.2c00812
Shuai-Jun Guo _{1,

2} , Hao-Yun Chang ₂ , Meng-Jia Xu ₃ , Chen-Xu Wang ₂ , Hua Wei ₂ , Dong-Dong Li ₄ , Jing Chen ₂ , Yang Zhou ₂ , Yi Liu ₁

Affiliation

Flexible artificial skin sensors have been a hot research topic over the past 20 years due to their remarkable prospects in the fabrication of smart wearable devices. Normally, electronic skin sensors transmit signals via stretchy electrical conductors, and the manufacturing processes are more complicated, involving multiple steps. For the first time, this work reports a facile one-step fabrication of poly(sodium methacrylate-co-vinylimidazole)-Co²⁺ hydrogels with high mechanical strength, good elasticity, and excellent sensitivity that can be used as ionic skins (I-skins). In addition, mechanical analysis indicates that the designed hydrogels have enhanced strain and tensile strength due to hydrogen bonding and metal–ligand bonding interactions, and these two types of dynamic noncovalent interactions are explored in detail. Simultaneously, the developed hydrogels also display superior conductivity and self-healing qualities with restored sensing properties. Furthermore, the proposed hydrogel with good sensitivity and stable strain range is suitable to fabricate a wearable strain sensor, and this hydrogel sensor was demonstrated to be effective in monitoring human motion, including joint flexion, pulse, vocal cord vibration, and respiration. In addition, a pressure distribution sensor array was developed by this hydrogel and was used to construct the model of plantar pressure distribution in normal subjects and flatfoot patients, offering a strategy for the early detection and clinical diagnosis of numerous foot-related disorders. Hence, this research may offer a promising approach for generating biocompatible hydrogels with integrated mechanical characteristics, and these hydrogels present development potentials in multifunctional ionic skins.

中文翻译：

用于柔性传感的具有增强机械性能的 Co2+ 介导的水凝胶

柔性人造皮肤传感器因其在智能可穿戴设备制造方面的显着前景而成为过去 20 年的热门研究课题。通常，电子皮肤传感器通过有弹性的电导体传输信号，制造过程更加复杂，涉及多个步骤。该工作首次报道了一种简便的一步法制备聚（甲基丙烯酸钠-co-乙烯基咪唑）-Co ²⁺具有高机械强度、良好弹性和优异敏感性的水凝胶，可用作离子皮肤（I-skins）。此外，力学分析表明，由于氢键和金属-配体键的相互作用，设计的水凝胶具有增强的应变和拉伸强度，并详细探讨了这两种类型的动态非共价相互作用。同时，开发的水凝胶还显示出优异的导电性和自愈特性，并恢复了传感特性。此外，所提出的具有良好灵敏度和稳定应变范围的水凝胶适用于制造可穿戴应变传感器，并且该水凝胶传感器被证明可有效监测人体运动，包括关节屈曲、脉搏、声带振动和呼吸。此外，该水凝胶开发了压力分布传感器阵列，用于构建正常人和扁平足患者的足底压力分布模型，为多种足部相关疾病的早期发现和临床诊断提供了策略。因此，这项研究可能为生产具有综合机械特性的生物相容性水凝胶提供了一种有前景的方法，并且这些水凝胶在多功能离子皮肤中具有发展潜力。

更新日期：2022-08-08

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11