Liu Ruixia, Guo Hongda, Liu Shouxin, Li Jian, Li Shujun, James Tony D, Chen Zhijun
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin, PR China.
Department of Chemistry, University of Bath, Bath, UK.
Nat Commun. 2024 Dec 4;15(1):10588. doi: 10.1038/s41467-024-55025-z.
Room temperature phosphorescent (RTP) hydrogels exhibit great potential but show poor mechanical performance (Tensile strengthen <1 MPa) and non-tunable RTP performance, hindering their practical applications. Here, we develop wood hydrogel (W-hydrogel) by the in situ polymerization of acrylamide in the presence of delignified wood. As a result of the molecular interactions between the components of delignified wood and polyacrylamide, the W-hydrogel exhibit a tensile strengthen of 38.4 MPa and green RTP emission with a lifetime of 32.5 ms. Moreover, the tensile strength and RTP lifetime are increased to 153.8 MPa and 69.7 ms, upon treating W-hydrogel with ethanol. Significantly, the mechanical and RTP performance of W-hydrogel is switched by alternating "ethanol and water" treatments. Additionally, W-hydrogel is used as energy donor in order to produce red afterglow emission using RhB via an energy transfer process. Taking advantage of these properties, W-hydrogel is processed into multiple hydrogel-based luminescent materials.
室温磷光（RTP）水凝胶具有巨大潜力，但机械性能较差（拉伸强度<1兆帕）且RTP性能不可调，这阻碍了它们的实际应用。在此，我们通过在脱木质素木材存在下原位聚合丙烯酰胺来制备木材水凝胶（W-水凝胶）。由于脱木质素木材成分与聚丙烯酰胺之间的分子相互作用，W-水凝胶表现出38.4兆帕的拉伸强度和绿色RTP发射，寿命为32.5毫秒。此外，用乙醇处理W-水凝胶后，拉伸强度和RTP寿命分别提高到153.8兆帕和69.7毫秒。值得注意的是，通过交替进行“乙醇和水”处理，可以切换W-水凝胶的机械性能和RTP性能。此外，W-水凝胶被用作能量供体，以便通过能量转移过程利用罗丹明B产生红色余辉发射。利用这些特性，W-水凝胶被加工成多种基于水凝胶的发光材料。
