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- W3203774558 endingPage "2101576" @default.
- W3203774558 startingPage "2101576" @default.
- W3203774558 abstract "Rational design of hydrogels that balance processability and extracellular matrix (ECM) biomimicry remains a challenge for tissue engineering and biofabrication. Hydrogels suitable for biofabrication techniques, yet tuneable to match the mechanical (static and dynamic) properties of native tissues remain elusive. Dynamic covalent hydrogels possessing shear-thinning/self-healing (processability) and time-dependent cross-links (mechanical properties) provide a potential solution, yet can be difficult to rationally control. Here, the straightforward modular mixing of dynamic cross-links with different timescales (hydrazone and oxime) is explored using rheology, self-healing tests, extrusion printing, and culture of primary human dermal fibroblasts. Maintaining a constant polymer content and cross-linker concentration, the stiffness and stress relaxation can be tuned across two orders of magnitude. All formulations demonstrate a similar flow profile after network rupture, allowing the separation of initial mechanical properties from flow behavior during printing. Furthermore, the self-healing nature of hydrogels with high hydrazone content enables recyclability of printed structures. Last, a distinct threshold for cell spreading and morphology is observed within this hydrogel series, even in multi-material constructs. Simple cross-linker mixing enables fine control and is of general interest for bioink development, targeting viscoelastic properties of specific cellular niches, and as an accessible and flexible platform for designing dynamic networks." @default.
- W3203774558 created "2021-10-11" @default.
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- W3203774558 date "2021-10-19" @default.
- W3203774558 modified "2023-10-10" @default.
- W3203774558 title "Tuning Hydrogels by Mixing Dynamic Cross‐Linkers: Enabling Cell‐Instructive Hydrogels and Advanced Bioinks" @default.
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- W3203774558 doi "https://doi.org/10.1002/adhm.202101576" @default.
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