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Inspired by the Janus nature of the peritoneum, we developed a phase\u2010separated patch with distinct functional interfaces through a straightforward layer\u2011by\u2011layer molding process. By fusing two sol layers with different polyvinyl alcohol (PVA)\u2010polyethylene glycol (PEG)\u2010dimethyl sulfoxide (DMSO)\u2010water ratios, in situ phase separation and PEG\u2011induced plasticization are achieved within the forming PVA hydrogel patch. The as\u2010produced patch features (i) a highly porous, soft surface to support healing of abdominal wall defects, and (ii) a dense, stiff surface to prevent visceral adhesion, and both functions have been confirmed in in vitro and in vivo evaluations. The patch demonstrates robust mechanical properties (0.73\u00a0MPa ultimate strength, 275% elongation) and exceptional anti\u2010swelling behaviors (\u22124.96% after immersion in 0.01\u00a0\n                    <jats:sc>m<\/jats:sc>\n                    PBS for 21 days), characteristics that are highly favored in clinical prognosis. Moreover, this patch is physically crosslinked and can be completely dissolved and recovered using only hot water. Such a phase\u2010separated patch is convenient in fabrication, environmentally friendly, biocompatible, and effective in antiadhesive tension\u2010free hernia repair, and thus should be valued as a promising candidate for next\u2010generation non\u2010woven hernia patch.\n                  <\/jats:p>","DOI":"10.1002\/adhm.202505515","type":"journal-article","created":{"date-parts":[[2025,12,20]],"date-time":"2025-12-20T06:49:07Z","timestamp":1766213347000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Phase\u2010Separated Patch With Dual\u2010Functional Interfaces Enables Antiadhesive Tension\u2010Free Hernia Repair"],"prefix":"10.1002","volume":"15","author":[{"given":"Shenglin","family":"Li","sequence":"first","affiliation":[{"name":"School of Biomedical Engineering Shenzhen Campus of Sun Yat\u2010Sen University  Shenzhen China"},{"name":"Shenzhen Institute for Drug Control Shenzhen Testing Center of Medical 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