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Rapid Commun."],"published-print":{"date-parts":[[2024,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Near\u2010infrared (NIR)\u2010triggered shape memory hydrogels with promising mechanical strength hold immense potential in the field of biomedical applications and soft actuators. However, the optical and mechanical properties of currently reported hydrogels usually suffer from limited solubility and dispersion of commonly used photothermal additives in hydrogels, thus restricting their practical implementations. Here,, a set of NIR\u2010responsive shape memory hydrogels synthesized by polyaddition of diisocyanate\u2010terminated poly(ethylene glycol), imidazolidinyl urea (IU), and <jats:italic>p<\/jats:italic>\u2010benzoquinone dioxime (BQDO) is reported. The introduction of IU, a hydrogen bond reinforcing factor, significantly enhances the mechanical properties of the hydrogels, allowing for their tunable ranges of the ultimate tensile strength (0.4\u20132.5 MPa), elongation at break (210\u2013450%), and Young's modulus (190\u2013850 kPa). The unique hydrogels exhibit an intrinsic photothermal effect because of the covalently incorporated photothermal moiety (BQDO), and the photothermal supramolecular hydrogel shows controllable shape memory capabilities characterized by rapid recovery speed and high recovery ratio (&gt;90%). This design provides new possibilities for applying shape memory hydrogels in the field of soft actuators.<\/jats:p>","DOI":"10.1002\/marc.202300737","type":"journal-article","created":{"date-parts":[[2024,3,24]],"date-time":"2024-03-24T10:59:42Z","timestamp":1711277982000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["An Intrinsic Photothermal Supramolecular Hydrogel with Robust Mechanical Strength and NIR\u2010Responsive Shape Memory"],"prefix":"10.1002","volume":"45","author":[{"given":"Ruyue","family":"Wang","sequence":"first","affiliation":[{"name":"School of Chemistry Xi'an Jiaotong University  Xi'an 710049 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xingxing","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering Southern University of Science and Technology  Shenzhen Guangdong 518055 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