Chen Haodi, Liu Xuehui, He Qian, Zhang Shouqin, Xu Shimei, Wang Yu-Zhong
The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, College of Architecture and Environment, Sichuan University, Chengdu, 610064, China.
Adv Mater. 2024 Jan;36(4):e2310779. doi: 10.1002/adma.202310779. Epub 2023 Dec 4.
Thermosetting polyimide (PI) has attracted extensive attention for its excellent properties, but the approaches to its end-of-life management are not sustainable, posing great threat to the ecosystem. Herein, this work proposes a mild, sustainable, and full recovery path for recycling waste carbon fiber reinforced phenylethynyl end-capped PI resin composites. In addition to recycling reaction reagent and woven carbon fiber, degraded products (DPETI) can be fully and directly used as high-performance and sustainable adhesives. DPETI exhibits strong adhesion to various surfaces, with a maximum adhesion strength of 1.84 MPa. Due to the strong supramolecular polymerization behavior without solvent dependence, DPETI demonstrates higher adhesive strength of 2.22 MPa in the extreme environment (-196 °C), which is maintained even after 10 cycles. This work sparks a new thinking for plastic wastes recycling that is to convert unrecyclable wastes into new and sustainable materials, which has the potential to establish new links within circular economies and influence the development of materials science.
热固性聚酰亚胺（PI）因其优异的性能而备受关注，但其报废管理方法不可持续，对生态系统构成巨大威胁。在此，本工作提出了一种温和、可持续且完全回收的途径，用于回收废弃碳纤维增强苯乙炔封端的PI树脂复合材料。除了回收反应试剂和编织碳纤维外，降解产物（DPETI）还可完全直接用作高性能且可持续的粘合剂。DPETI对各种表面表现出强粘附力，最大粘附强度为1.84MPa。由于具有无需依赖溶剂的强超分子聚合行为，DPETI在极端环境（-196°C）下表现出更高的2.22MPa的粘合强度，即使经过10个循环后仍能保持。这项工作为塑料废物回收带来了新的思路，即将不可回收的废物转化为新型可持续材料，这有可能在循环经济中建立新的联系并影响材料科学的发展。
