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Herein, a light\u2010triggered dynamic polydimethylsiloxane (PDMS) network design, that enabled a closed\u2010loop recyclable separation membrane with superior pervaporation performance, is proposed. Such a dynamic network is constructed through [4 + 4] photodimerization of anthracene grafted PDMS under 365\u2010nm UV light, while 254\u2010nm UV light transforms the crosslinked membranes into linear polymers. The facile deconstruction process is completed within 35 min at ambient temperature, and recycling test demonstrates efficient reconstruction of PDMS networks with 92.6% conversion of anthracene groups within 10 min. The membrane exhibits a superior ethanol recovery performance with a pervaporation separation index of 13,285, surpassing the reported state\u2010of\u2010the\u2010art PDMS\u2010based membranes. The recycled membrane retains efficient ethanol recovery even after five solid\u2010liquid conversion cycles with minor deviations in flux and separation factor compared to the original membrane. Such a dynamic network also demonstrates an efficient self\u2010healing capability with retained pervaporation performance toward minor defects. The design principle of closed\u2010loop chemically recyclable separation membranes with retained and superior functionality provides a scalable membrane technique adaptable to diverse separation applications.<\/jats:p>","DOI":"10.1002\/adma.73725","type":"journal-article","created":{"date-parts":[[2026,6,15]],"date-time":"2026-06-15T07:33:26Z","timestamp":1781508806000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Closed\u2010Loop Chemically Recyclable Separation Membranes With Superior Pervaporation Performance"],"prefix":"10.1002","volume":"38","author":[{"given":"Yan","family":"Zhuang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Green Biomanufacturing National Energy R&amp;D Center for Biorefinery Beijing University of Chemical Technology  Beijing P. R. 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