Ye Zewei, Yu Haomeng, Xie Hongxia, Zhu Wenwen, Shi Shitao, Liu Chencong, Wang Yuanyuan, Liao Jiaqi, Sun Qingfeng, Zhao Dawei, Shen Xiaoping
College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, 311300, P. R. China.
Key Laboratory on Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China.
Adv Sci (Weinh). 2025 Jun 25:e06901. doi: 10.1002/advs.202506901.
Ionogel intended for fire environments encounters considerable challenges stemming from intrinsic limitations, such as inadequate heat resistance and potential damage to their structural networks. Here, a glycol lignin ionogel (GLI) with integrated flame-retardant, waterproof, and sensing capabilities for smart firefighting auxiliary equipment is presented. The ionogel, synthesized from the molecular network construction of Gly-lignin, 1-butyl-3-vinylimidazole tetrafluoroborate (BVIMBF), and benzyl methacrylate (BZMA), forms a stable and elastic 3D conductive network through both chemical and physical crosslinking. This structure imparts remarkable mechanical properties, including considerable adhesion (30.4 kPa on flame-retardant gloves), tensile strength (5.8 MPa), and high ionic conductivity. Notably, through the formation of a protective carbonized/B₂O₃ layer and chemical barrier gases during combustion, the ionogel exhibits excellent flame retardancy, with a weight loss of 41.8% at 800 °C. Additionally, GLI achieves real-time thermal sensing via its negative temperature coefficient (NTC) behavior (TCR = -0.58% °C). Even after exposure to fire, GLI retains its temperature and motion-sensing capabilities. Moreover, GLI demonstrates favorable biocompatibility and environmental degradability, broadening its applicability in sustainable and wearable electronics. The work provides new insights for the preparation of the next generation of fireproof multifunctional intelligent sensors.
用于火灾环境的离子凝胶由于其固有的局限性，如耐热性不足和结构网络可能受损，面临着相当大的挑战。在此，我们展示了一种具有集成阻燃、防水和传感功能的乙二醇木质素离子凝胶（GLI），用于智能消防辅助设备。该离子凝胶由甘醇木质素、1-丁基-3-乙烯基咪唑四氟硼酸盐（BVIMBF）和甲基丙烯酸苄酯（BZMA）的分子网络构建而成，通过化学和物理交联形成稳定且有弹性的三维导电网络。这种结构赋予了显著的机械性能，包括可观的附着力（在阻燃手套上为30.4 kPa）、拉伸强度（5.8 MPa）和高离子导电性。值得注意的是，通过在燃烧过程中形成保护性的碳化/B₂O₃层和化学阻隔气体，该离子凝胶表现出优异的阻燃性，在800°C时重量损失为41.8%。此外，GLI通过其负温度系数（NTC）行为（TCR = -0.58% °C）实现实时热传感。即使在暴露于火灾后，GLI仍保留其温度和运动传感能力。此外，GLI表现出良好的生物相容性和环境可降解性，拓宽了其在可持续和可穿戴电子产品中的适用性。这项工作为制备下一代防火多功能智能传感器提供了新的见解。
