Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
Molecules. 2022 Dec 16;27(24):8971. doi: 10.3390/molecules27248971.
Recently, the sustainable utilization of waste resources has become a low-cost and effective strategy to design high-performance functional materials to solve the increasingly serious environmental pollution problem. Herein, the flexible and highly stretchable polyurethane (PU) composite foams assisted by one-dimensional carbon nanotubes (CNTs) and zero-dimensional Fe3O4 were fabricated using waste tire rubbers (WTRs) as reinforcements during a simple self-foaming process. The collaborative introduction of conductive CNTs, magnetic Fe3O4, and WTRs with three-dimensional cross-linked structures enabled the construction of an efficient electronic transmission path and heterointerfaces inside the composite foam. The resulting composite foam possessed a desired minimum reflection loss (RLmin) of −47.43 dB, and also exhibited superior mechanical properties with a tensile strength of >3 MPa and multiple tensile deformation recovery abilities. In addition, increasing the temperature could significantly improve the electromagnetic wave absorption performance of the composite foam. This comprehensive composite foam derived from WTRs has shown a promising development potential for using waste materials to relieve electromagnetic pollution.
最近，可持续利用废物资源已成为设计高性能功能材料的一种低成本、有效策略，以解决日益严重的环境污染问题。在此，通过简单的自发泡工艺，以废轮胎橡胶（WTR）作为增强剂，制备了由一维碳纳米管（CNTs）和零维 Fe3O4 辅助的柔性、高拉伸的聚氨酯（PU）复合泡沫。协同引入具有三维交联结构的导电 CNTs、磁性 Fe3O4 和 WTR，在复合泡沫内部构建了高效的电子传输路径和异质界面。所得复合泡沫的最小反射损耗（RLmin）达到了-47.43dB，同时还具有优异的力学性能，拉伸强度大于 3MPa，并且具有多次拉伸变形恢复能力。此外，提高温度可以显著改善复合泡沫的电磁波吸收性能。这种源自 WTR 的综合复合泡沫显示出了使用废物材料缓解电磁污染的广阔发展潜力。
