A Chinese research team has developed a strong and self-healing bio-based polyhydroxyurethane (PHU) network using carbonized daidzein (DZ-BCC) and amines. The PHUs have high mechanical stability, can be recycled, and show excellent reprocessing efficiency. They can be used as adhesives for bonding wood and glass, with tensile strengths of up to 28.3 MPa and shear strengths of up to 6.4 MPa for wood and 3.4 MPa for glass. The materials also demonstrate remarkable self-healing properties, with a tensile strength that can be restored to 94% of its original value after 30 minutes at 150°C. The research suggests that bio-based PHUs could be used to develop sustainable high-performance adhesives. This advance has significant implications for industries that require strong, sustainable, and reusable materials, such as construction, automotive, and aerospace. Further research is needed to fully exploit the potential of these materials, but the current results are promising for the development of a more sustainable future.
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