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In this study, a series of self-healable materials (named as PU-S) with high light transmittance possessing two dynamic covalent bonds (oxime bond and disulfide bond) in different ratios were fabricated by the one-pot method, and then the prepared PU-S were foamed utilizing the green and efficient supercritical carbon dioxide (scCO2) foaming technology. The PU-S foams possess multiple dynamic covalent bonds as well as porous structures, and the effect of the dynamic covalent bonds endows the materials with excellent self-healing properties and recyclability. Owing to the tailored design of dynamic covalent bonding synergies and micron-sized porous structures, PU-S5 exhibits hydrophobicity (97.5\u00b0 water contact angle), low temperature flexibility (Tg = \u221230.1 \u00b0C), high light transmission (70.6%), and light weight (density of 0.12 g\/cm3) together with high expansion ratio (~10 folds) after scCO2 foaming. Furthermore, PU-S5 achieves damage recovery under mild thermal conditions (60 \u00b0C). Accordingly, self-healing PU-S based on multiple dynamic covalent bonds will realize a wide range of potential applications in biomedical, new energy automotive, and wearable devices.<\/jats:p>","DOI":"10.3390\/polym17192639","type":"journal-article","created":{"date-parts":[[2025,9,30]],"date-time":"2025-09-30T10:54:48Z","timestamp":1759229688000},"page":"2639","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Transparent Polyurethane Elastomers with Excellent Foamability and Self-Healing Property via Molecular Design and Dynamic Covalent Bond Regulation"],"prefix":"10.3390","volume":"17","author":[{"given":"Rongli","family":"Zhu","sequence":"first","affiliation":[{"name":"National Key Laboratory of Advanced Polymer Materials, College of Polymer Science and Engineering, Sichuan University, 24 Nanyiduan of Yihuan Road, Chengdu 610065, China"},{"name":"Jiangsu JITRI Advanced Polymer Materials Research Institute, Tengfei Building, 88 Jiangmiao Road, Jiangbei New District, Nanjing 211800, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingxi","family":"Linghu","sequence":"additional","affiliation":[{"name":"National Key Laboratory of Advanced Polymer Materials, College of Polymer Science and Engineering, Sichuan University, 24 Nanyiduan of Yihuan Road, Chengdu 610065, China"},{"name":"Jiangsu JITRI Advanced Polymer Materials Research Institute, Tengfei Building, 88 Jiangmiao Road, Jiangbei New District, Nanjing 211800, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xueliang","family":"Liu","sequence":"additional","affiliation":[{"name":"Chengdu Kingfa science and technology Advanced Materials Co., Ltd., No. 665 Fujia Road, Huangjia Street, Southwest Airport Economic Development Zone, Shuangliu District, Chengdu 610213, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liang","family":"Lei","sequence":"additional","affiliation":[{"name":"Chengdu Kingfa science and technology Advanced Materials Co., Ltd., No. 665 Fujia Road, Huangjia Street, Southwest Airport Economic Development Zone, Shuangliu District, Chengdu 610213, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qi","family":"Yang","sequence":"additional","affiliation":[{"name":"National Key Laboratory of Advanced Polymer Materials, College of Polymer Science and Engineering, Sichuan University, 24 Nanyiduan of Yihuan Road, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pengjian","family":"Gong","sequence":"additional","affiliation":[{"name":"National Key Laboratory of Advanced Polymer Materials, College of Polymer Science and Engineering, Sichuan University, 24 Nanyiduan of Yihuan Road, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guangxian","family":"Li","sequence":"additional","affiliation":[{"name":"National Key Laboratory of Advanced Polymer Materials, College of Polymer Science and Engineering, Sichuan University, 24 Nanyiduan of Yihuan Road, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"106409","DOI":"10.1016\/j.porgcoat.2021.106409","article-title":"Hard, tough and fast self-healing thermoplastic polyurethane","volume":"159","author":"Wu","year":"2021","journal-title":"Prog. 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