Wang Lei, Liu Jie, Zong Meng, Liu Yi, Zhu Jianfeng
Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
The MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Ministry of Education, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710129, China.
Gels. 2025 Jun 5;11(6):436. doi: 10.3390/gels11060436.
In the past, powder-like microwave absorbers have made notable breakthroughs in performance enhancements, but complicated processes and undesirable properties have limited their practical application. Herein, a novel poly(ionic liquid) (PIL)-based ionic gel with excellent microwave absorption properties was prepared via a facile UV-initiated polymerization method. By simply adjusting the mole ratio of the polymerizable ionic liquid (IL)monomer and the IL dispersion medium, the microwave absorption properties of the obtained ionic gels can be tuned. A maximum reflection loss (RL) of -45.7 dB and an effective absorption bandwidth (EAB) of 8.08 GHz were achieved, which was mainly ascribed to high ionic conduction loss induced by the high content of the dispersion medium. Furthermore, it displayed recyclable, adhesive, and self-healing properties, thus providing a new candidate for developing efficient microwave absorbers for practical applications.
过去，粉末状微波吸收剂在性能提升方面取得了显著突破，但复杂的工艺和不理想的性能限制了它们的实际应用。在此，通过简便的紫外光引发聚合方法制备了一种具有优异微波吸收性能的新型聚离子液体（PIL）基离子凝胶。通过简单调整可聚合离子液体（IL）单体与IL分散介质的摩尔比，可调节所得离子凝胶的微波吸收性能。实现了-45.7 dB的最大反射损耗（RL）和8.08 GHz的有效吸收带宽（EAB），这主要归因于高含量分散介质引起的高离子传导损耗。此外，它还表现出可回收、粘性和自愈性能，从而为开发用于实际应用的高效微波吸收剂提供了新的候选材料。
