Biomimetic Organohydrogels with Tunable Architectures via Controlled Evaporation-Freeze/Thaw Self-Assembly
Conventional hydrogels often face inherent limitations such as dehydration sensitivity, mechanical brittleness, and optical opacity, which severely restrict their advanced applications. In this study, we report a controlled evaporation-freeze/thaw self-assembly strategy for fabricating biomimetic po...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1985. - 41(2025), 30 vom: 05. Aug., Seite 20136-20143 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article |
| Zusammenfassung: | Conventional hydrogels often face inherent limitations such as dehydration sensitivity, mechanical brittleness, and optical opacity, which severely restrict their advanced applications. In this study, we report a controlled evaporation-freeze/thaw self-assembly strategy for fabricating biomimetic poly(vinyl alcohol)/graphene oxide nanosheet (PG) organohydrogels with tunable architectures. Inspired by natural nacre, homogeneous layered PG organohydrogels are engineered to simultaneously achieve superior mechanical properties and optical transparency, enabled by a nacre-mimetic "brick-and-mortar" microstructure with aligned polymer-nanosheet interfaces. Remarkably, post-treatments combining prolonged evaporation and UV-induced reduction synergistically enhance the mechanical performance, yielding a tensile strength of 6.3 MPa and toughness of 43.0 MJ/m3, surpassing those of many reported poly(vinyl alcohol) (PVA)-based hydrogels. Furthermore, the humidity-regulated self-assembly process enables the creation of skin-like gradient PG organohydrogels, mimicking epidermal-dermal structural hierarchies to achieve optimized water retention and mechanical stability. This work establishes a universal platform for designing high-performance hydrogels that reconcile traditionally conflicting properties, offering great potential for applications in flexible electronics, soft robotics, and biointegrated devices that require environmental adaptability |
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| Beschreibung: | Date Revised 05.08.2025 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/acs.langmuir.5c02378 |