Xu Hongyu, Zhang Jingjing, Lu Xue, Feng Shijing, Xu Zigang
College of Biology and Food Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China.
College of Biology and Food Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China.
Int J Biol Macromol. 2025 May;310(Pt 4):143466. doi: 10.1016/j.ijbiomac.2025.143466. Epub 2025 Apr 23.
In this study, a novel composite functional hydrogel was developed, integrating outstanding mechanical properties, remarkable catalytic activity, and highly sensitive sensing performance. Here, the dispersion behavior of TiCT(MXene) via ionic liquids was examined, focusing on the interplay between surface functional groups of MXene and IL. The study aims to elucidate the mechanisms governing dispersion stability. Subsequently, a novel Polyacrylamide(PAM)/Polyacrylic acid(PAA)/Chitosan/ionic liquid(IL)-MXene hydrogel was designed. PAM/PAA offers a 3D framework, multiple bonds such as hydrogen bonds and electrostatic interactions are formed with PAM/PAA and chitosan by IL-MXene, and the mechanical strength of the hydrogel is further enhanced. Meanwhile, the hydrogel is endowed with good electrical conductivity and sensing capabilities by MXene, which serves as a conductive filler. A strain of 2980 %, a tensile strength of 1050 kPa are displayed by the hydrogel. Simultaneously, it exhibits high gauge factor (GF) and a rapid response time. Under an eco-conscious waste management framework, the functional regeneration of waste hydrogels into high-performance adsorbents represents a significant advancement in sustainable environmental remediation. For instance, the discarded pAAm/PAA/Chitosan/IL-MXene hydrogel system serves as an effective template for the in situ synthesis of gold nanoparticles (Au NPs), demonstrating exceptional catalytic activity in the reduction of 4-nitrophenol (4-NP). Beyond its catalytic efficiency, this composite hydrogel exhibits outstanding mechanical robustness and multifunctionality. In particular, the chitosan within the hydrogel matrix plays a significant role in enhancing antibacterial properties. Moreover, even after undergoing several catalytic cycles, it still maintains >90 % of its original state, indicating excellent cyclic stability and recyclability. Due to these outstanding characteristics, multifunctional hydrogel holds great promise for applications in the fields of flexible sensors and catalysis.
在本研究中，开发了一种新型复合功能水凝胶，它兼具出色的机械性能、显著的催化活性和高灵敏度传感性能。在此，研究了通过离子液体实现的TiCT（MXene）的分散行为，重点关注MXene表面官能团与离子液体之间的相互作用。该研究旨在阐明控制分散稳定性的机制。随后，设计了一种新型的聚丙烯酰胺（PAM）/聚丙烯酸（PAA）/壳聚糖/离子液体（IL）-MXene水凝胶。PAM/PAA提供了一个三维框架，IL-MXene与PAM/PAA和壳聚糖形成了诸如氢键和静电相互作用等多种键，进一步增强了水凝胶的机械强度。同时，MXene作为导电填料赋予水凝胶良好的导电性和传感能力。该水凝胶显示出2980%的应变和1050 kPa的拉伸强度。同时，它具有高应变片因子（GF）和快速响应时间。在注重生态的废物管理框架下，将废弃水凝胶功能再生为高性能吸附剂代表了可持续环境修复方面的一项重大进展。例如，废弃的pAAm/PAA/壳聚糖/IL-MXene水凝胶体系可作为原位合成金纳米颗粒（Au NPs）的有效模板，在4-硝基苯酚（4-NP）还原反应中表现出卓越的催化活性。除了催化效率外，这种复合水凝胶还具有出色的机械稳健性和多功能性。特别是，水凝胶基质中的壳聚糖在增强抗菌性能方面发挥着重要作用。此外，即使经过多次催化循环，它仍能保持其原始状态的>90%，表明具有出色的循环稳定性和可回收性。由于这些突出特性，多功能水凝胶在柔性传感器和催化领域具有广阔的应用前景。
