Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry; National Engineering Laboratory for Biomass Chemical Utilization; Key Laboratory of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Laboratory of Biomass Energy and Material; Nanjing, 210042, Jiangsu, China.
Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, Jilin, China.
Carbohydr Polym. 2022 Oct 15;294:119760. doi: 10.1016/j.carbpol.2022.119760. Epub 2022 Jun 22.
With the development of wearable devices, the fabrication of strong, tough, antibacterial, and conductive hydrogels for sensor applications is necessary but remains challenging. Here, a skin-inspired biomimetic strategy integrated with in-situ reduction has been proposed. The self-assembly of cellulose to generate a cellulose skeleton was essential to realize the biomimetic structural design. Furthermore, in-situ generation of silver nanoparticles on the skeleton was easily achieved by a heating process. This process not only offered the excellent antibacterial property to hydrogels, but also improved the mechanical properties of hydrogels due to the elimination of negative effect of silver nanoparticles aggregation. The highest tensile strength and toughness could reach 2.0 MPa and 11.95 MJ/m, respectively. Moreover, a high detection range (up to 1300%) and sensitivity (gauge factor = 4.4) was observed as the strain sensors. This study provides a new horizon to fabricate strong, tough and functional hydrogels for various applications in the future.
随着可穿戴设备的发展，对于传感器应用而言，制造具有强韧、抗菌和导电性能的水凝胶是必要的，但仍然具有挑战性。在这里，提出了一种与原位还原相结合的皮肤启发仿生策略。纤维素的自组装对于产生纤维素骨架对于实现仿生结构设计至关重要。此外，骨架上的银纳米粒子可以通过加热过程轻松原位生成。该过程不仅为水凝胶提供了出色的抗菌性能，而且由于消除了银纳米粒子聚集的负面影响，还提高了水凝胶的机械性能。最高拉伸强度和韧性分别可达 2.0 MPa 和 11.95 MJ/m。此外，应变传感器的检测范围（高达 1300%）和灵敏度（应变系数= 4.4）都很高。这项研究为未来各种应用制造强韧和功能性水凝胶提供了新的前景。
