Liu Chenglu, Xu Zhengyan, Chandrasekaran Sundaram, Liu Yongping, Wu Mengyang
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China; Guangxi Colleges and Universities Key Laboratory of surface and interface electrochemistry, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Carbohydr Polym. 2023 Mar 1;303:120468. doi: 10.1016/j.carbpol.2022.120468. Epub 2022 Dec 16.
Multifunctional hydrogels have great potential in smart wearable technology, flexible electronic devices, and biomedical research. However, it is highly challenging to prepare unique conductive hydrogels with combined properties such as self-healing, self-adhesive, and antibacterial activity. In this regard, herein, a conductive double network hydrogel (ACBt-PAA/CMCs) was fabricated using carboxymethyl chitosan (CMCs), acrylic acid (AA), and alkaline calcium bentonite (ACBt) via a convenient approach. Owing to the hydrogen bond interaction between PAA and CMCs, the ACBt-PAA/CMCs double network structured hydrogels exhibited excellent self-healing (the tensile strength recovered to 74.3 % after 1 h) and adjustable mechanical properties, in which the fracture stress and strain can be easily adjusted in the range of 0.039 to 0.93 MPa and 564 to 2900 %, respectively. In addition, the ACBt-PAA/CMCs hydrogels exhibited the remarkable antibacterial activities against Escherichia coli (bacterial inhibition efficiency of ~99.99 %) and Staphylococcus aureus (bacterial inhibition efficiency of ~99.98 %). Furthermore, the ACBt-PAA/CMCs hydrogel based wearable skin exhibited an excellent real-time sensing performance for monitoring various motions, signifying outstanding sensing and self-adhesion properties. Considering the unique features such as self-healing, excellent adhesion, highly active strain sensing, and antibacterial activities making the ACBt-PAA/CMCs hydrogel is an excellent multifunctional conductive hydrogel. Hence, we believe that this proposed design method for the fabrication of smart and multifunctional conductive hydrogels, and this ACBt-PAA/CMCs hydrogel could be a promising candidate for flexible wearable materials, health monitoring, and beyond.
多功能水凝胶在智能可穿戴技术、柔性电子设备和生物医学研究中具有巨大潜力。然而，制备具有自愈、自粘和抗菌活性等综合性能的独特导电水凝胶极具挑战性。在这方面，本文通过一种简便方法，使用羧甲基壳聚糖（CMCs）、丙烯酸（AA）和碱性钙膨润土（ACBt）制备了一种导电双网络水凝胶（ACBt-PAA/CMCs）。由于PAA和CMCs之间的氢键相互作用，ACBt-PAA/CMCs双网络结构水凝胶表现出优异的自愈性能（1小时后拉伸强度恢复到74.3%）和可调节的机械性能，其中断裂应力和应变可分别在0.039至0.93MPa和564至2900%的范围内轻松调节。此外，ACBt-PAA/CMCs水凝胶对大肠杆菌（细菌抑制效率约为99.99%）和金黄色葡萄球菌（细菌抑制效率约为99.98%）表现出显著的抗菌活性。此外，基于ACBt-PAA/CMCs水凝胶的可穿戴皮肤在监测各种运动时表现出优异的实时传感性能，彰显出出色的传感和自粘性能。考虑到自愈、优异粘附、高活性应变传感和抗菌活性等独特特性，ACBt-PAA/CMCs水凝胶是一种优异的多功能导电水凝胶。因此，我们认为这种用于制备智能多功能导电水凝胶的设计方法，以及这种ACBt-PAA/CMCs水凝胶有望成为柔性可穿戴材料、健康监测等领域的候选材料。
