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We report an environmentally self\u2010reinforcing and easily recyclable unprecedented biomass\u2010derived supramolecular polyester that circumvents this limitation through the synergistic integration of dynamic hydrogen bonds and halogen\u2010bond\u2010assisted depolymerization. Amide\u2010mediated hydrogen\u2010bond networks undergo environment\u2010activated supramolecular rearrangement under hygrothermal, ultraviolet, and electrical aging conditions, promoting chain realignment, recrystallization, and network densification. As a result, the material exhibits self\u2010reinforcing behavior, achieving an ultrahigh tensile strength of 138.4\u00a0MPa (61% increase) and a UV\u2010shielding efficiency of 98% (36% increase) while maintaining excellent electrical insulation. Simultaneously, halogen\u2010bond interactions enhance solvent penetration and facilitate ester activation, enabling rapid depolymerization in dichloromethane at ambient temperature. Monomers are recovered with &gt;99% purity and &gt;90% yield for closed\u2010loop repolymerization, while also enabling molecular upcycling into supramolecular adhesives exhibiting exceptional chemical resistance and an ultrahigh cryogenic bonding strength of 11.0\u00a0MPa at \u2212196\u00b0C. This work establishes a supramolecular design principle that decouples service\u2010life reinforcement from end\u2010of\u2010life chemical deconstruction, providing a general strategy for reconciling durability and recyclability in polymeric materials.<\/jats:p>","DOI":"10.1002\/anie.4709247","type":"journal-article","created":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T13:30:14Z","timestamp":1792071014000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synergistic Supramolecular Bonding Enables Self\u2010Reinforcing and Chemically Recyclable Sustainable Materials"],"prefix":"10.1002","author":[{"given":"Zhen","family":"Zhou","sequence":"first","affiliation":[{"name":"State Key Laboratory of Advanced Polymer Materials Polymer Research Institute The Collaborative Innovation Center for Eco\u2010Friendly and Fire\u2010Safety Polymeric Materials (MoE) National Engineering Laboratory of Eco\u2010Friendly 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