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Catalyst-Free Dynamic Covalent Polyureas: From Structural Design to Functional Applications
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DOI：10.1002/syst.202500063.png)
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Abstract
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Catalyst-free dynamic covalent polyureas (DCPUs) have emerged as a promising class of environmentally friendly and sustainable materials that combine the mechanical robustness of traditional polyureas with the stimuli-responsive properties of dynamic urea bonds (DUBs). This review elaborates on the general concepts that have guided important developments of the recent advances in catalyst-free DUBs and DCPUs, focusing on the dynamic mechanisms of well-designed urea bonds, structure-property relationships, and diverse applications. The rational design of DUBs is discussed, highlighting their unique features in terms of DUBs' reversibility and kinetics. Furthermore, the mechanical properties, self-healing efficiency, thermal stability, reprocessability, and recyclability of DCPUs are analyzed, along with their potential applications in self-healing coatings, recyclable composites, shape-memory materials, 3D printing, and so on. Finally, the current challenges and future perspectives in this fast-growing field of DUBs and DCPUs are discussed.
Keywords:
dynamic covalent chemistry
dynamic covalent polyureas
dynamic urea bonds
catalyst-free
recycled materials
Journal
C
IF:
3.1
Papers:
258
Citations:
457
Organization
Cited Papers