Tough and Self-Healing Recycled Polyurethanes with Tunable Fluorescence by Chain Aggregation
Recycling of thermoset polyurethanes (PUs) has aroused wide-ranging concerns. However, degraded thermoset PUs face great challenges in effectively rebuilding the network for multifunctional upgradation due to random chain breakage. Herein, we incorporate anionically polymerized poly(maleimide) (PM)...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , , , |
| منشور في: |
2025
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| الموضوعات: | |
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إضافة وسم
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| الملخص: | Recycling of thermoset polyurethanes (PUs) has aroused wide-ranging concerns. However, degraded thermoset PUs face great challenges in effectively rebuilding the network for multifunctional upgradation due to random chain breakage. Herein, we incorporate anionically polymerized poly(maleimide) (PM) into the reconfigured PU network to achieve improved mechanical and self-healing properties, and tunable emission of the recycled PU by chain aggregation. The aggregation of PM or degraded PU fragments via hydrogen bonding interactions forms three main cluster luminophores, of which the changing relative proportion gives rise to tunable emission (from blue to green). Meanwhile, hydrogen bonding interactions between the PM and PU chains serve as sacrificial bonds and dynamic bonds to enhance the mechanical properties (61.7 MJ/m<sup>3</sup>, increased by 52 times) and self-healing abilities (86.6%), respectively. The design of chain aggregation opens up a new perspective for the multifunctional upgradation of recycled PU and greatly facilitates the value-added utilization of waste thermoset PUs. |
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