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- W4288804895 abstract "Folded protein hydrogels are prime candidates as tuneable biomaterials but it is unclear to what extent their mechanical properties have mesoscopic, as opposed to molecular origins. To address this, we probe hydrogels of the muscle-derived protein $I27_5$, using a multimodal rheology approach. Across multiple protocols, the hydrogels consistently exhibit power-law viscoelasticity in the linear viscoelastic regime with an exponent $beta = 0.03$, suggesting a dense fractal meso-structure, with predicted fractal dimension $d_f = 2.48$. In the nonlinear viscoelastic regime, the hydrogel undergoes stiffening and energy dissipation, indicating simultaneous alignment and unfolding of the folded proteins. Remarkably, this behaviour is highly reversible, as the value of $beta$, $d_f$ and the viscoelastic moduli return to their equilibrium value, even after multiple cycles of deformation. This highlights a previously unrevealed diversity of viscoelastic properties that originate on the mesoscopic scale. These considerations are likely to be key to controlling the viscoelasticity of folded protein hydrogels." @default.
- W4288804895 created "2022-07-30" @default.
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- W4288804895 date "2022-07-27" @default.
- W4288804895 modified "2023-09-30" @default.
- W4288804895 title "Power Law Rheology of Folded Protein Hydrogels" @default.
- W4288804895 doi "https://doi.org/10.48550/arxiv.2207.13348" @default.
- W4288804895 hasPublicationYear "2022" @default.
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