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https://locus.ufv.br//handle/123456789/19321
Tipo: | Artigo |
Título: | On the relationship between the plateau modulus and the threshold frequency in peptide gels |
Autor(es): | Rizzi, L. G. |
Abstract: | Relations between static and dynamic viscoelastic responses in gels can be very elucidating and may provide useful tools to study the behavior of bio-materials such as protein hydrogels. An important example comes from the viscoelasticity of semisolid gel-like materials, which is characterized by two regimes: a low-frequency regime, where the storage modulus G (ω) displays a constant value Geq , and a high-frequency power-law stiffening regime, where G (ω) ∼ ωn . Recently, by considering Monte Carlo simulations to study the formation of peptides networks, we found an intriguing and somewhat related power-law relationship between the plateau modulus and the threshold frequency, i.e., Geq ∼ (ω∗ )∆ with ∆ = 2/3. Here we present a simple theoretical approach to describe that relationship and test its validity by using experimental data from a β-lactoglobulin gel. We show that our approach can be used even in the coarsening regime where the fractal model fails. Remarkably, the very same exponent ∆ is found to describe the experimental data. |
Palavras-chave: | Plateau modulus Peptide gels |
Editor: | The Journal of Chemical Physics |
Tipo de Acesso: | Published by AIP Publishing |
URI: | https://doi.org/10.1063/1.5012753 http://www.locus.ufv.br/handle/123456789/19321 |
Data do documento: | 29-Dez-2017 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | texto completo | 464,87 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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