Strain-stiffening in dynamic supramolecular fiber networks
| Autor: | Jurgen Schill, Peter Paul K.H. Fransen, Rint P. Sijbesma, Cornelis Storm, Ilja K. Voets, Gijs M. ter Huurne, Xianwen Lou, Marcos Fernández-Castaño Romera |
|---|---|
| Přispěvatelé: | Stimuli-responsive Funct. Materials & Dev., Institute for Complex Molecular Systems, Macro-Organic Chemistry, Chemical Biology, Biomedical Materials and Chemistry, Self-Organizing Soft Matter, Soft Matter and Biological Physics, Macromolecular and Organic Chemistry, Supramolecular Polymer Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
010405 organic chemistry Chemistry Supramolecular chemistry Supramolecular fiber General Chemistry Polymer 010402 general chemistry 01 natural sciences Biochemistry Catalysis Article 0104 chemical sciences Stiffening Stress (mechanics) Colloid and Surface Chemistry Rheology Self-healing hydrogels Biophysics Fiber |
| Zdroj: | Journal of the American Chemical Society, 140(50), 17547-17555. American Chemical Society Journal of the American Chemical Society |
| ISSN: | 0002-7863 |
| Popis: | The cytoskeleton is a highly adaptive network of filamentous proteins capable of stiffening under stress even as it dynamically assembles and disassembles with time constants of minutes. Synthetic materials that combine reversibility and strain-stiffening properties remain elusive. Here, strain-stiffening hydrogels that have dynamic fibrous polymers as their main structural components are reported. The fibers form via self-assembly of bolaamphiphiles (BA) in water and have a well-defined cross-section of 9 to 10 molecules. Fiber length recovery after sonication, H/D exchange experiments, and rheology confirm the dynamic nature of the fibers. Cross-linking of the fibers yields strain-stiffening, self-healing hydrogels that closely mimic the mechanics of biological networks, with mechanical properties that can be modulated by chemical modification of the components. Comparison of the supramolecular networks with covalently fixated networks shows that the noncovalent nature of the fibers limits the maximum stress that fibers can bear and, hence, limits the range of stiffening. |
| Databáze: | OpenAIRE |
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