School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China.
College of Materials Science and Engineering, Nanjing Forestry University, 210037 Nanjing, China.
Int J Biol Macromol. 2022 Dec 1;222(Pt A):487-496. doi: 10.1016/j.ijbiomac.2022.09.197. Epub 2022 Sep 26.
Ionic conductive hydrogels prepared from various biological macromolecules are ideal materials for the manufacture of human motion sensors from the perspective of resource regeneration and environmental sustainability. However, it is still challenging to prepare hydrogels with both high toughness and self-healing ability. In this study, lignin-based β-CD-PVA (LCP) self-healing conductive hydrogels with high tensile properties were prepared by one-step method using alkali lignin as a plasticizer. Compared with PVA hydrogel, the maximum storage modulus and elongation were increased by 2.5 and 20.0 times, respectively. Uniform distribution of lignin can increase the fluidity and distance of polymer molecular chains, thus improving the viscoelastic and tensile properties of the LCP self-healing hydrogel. LCP hydrogels can maintain self-healing ability in both high (45 °C) and low temperature (0 °C) environments, and the self-healing ability is not affected by pH. Moreover, it also has good conductivity, anti-bacterial, thermostability, and anti-UV property, which has a good application prospect in the field of 3D printing and wearable electronic devices, which expands the efficient utilization of lignin in biorefinery.
从资源再生和环境可持续性的角度来看，由各种生物大分子制备的离子导电水凝胶是制造人体运动传感器的理想材料。然而，制备具有高韧性和自修复能力的水凝胶仍然具有挑战性。在这项研究中，通过一步法使用碱木质素作为增塑剂制备了具有高拉伸性能的基于木质素的β-CD-PVA（LCP）自修复导电水凝胶。与 PVA 水凝胶相比，最大储能模量和伸长率分别提高了 2.5 倍和 20.0 倍。木质素的均匀分布可以增加聚合物分子链的流动性和距离，从而提高 LCP 自修复水凝胶的粘弹性和拉伸性能。LCP 水凝胶在高温（45°C）和低温（0°C）环境下都能保持自修复能力，且自修复能力不受 pH 值的影响。此外，它还具有良好的导电性、抗菌性、热稳定性和抗紫外线性能，在 3D 打印和可穿戴电子设备领域具有良好的应用前景，拓展了木质素在生物炼制中的高效利用。
