Molecular simulation study of role of polymer–particle interactions in the strain-dependent viscoelasticity of elastomers (Payne effect)

2014 ◽  
Vol 141 (10) ◽  
pp. 104901 ◽  
Author(s):  
Yulong Chen ◽  
Ziwei Li ◽  
Shipeng Wen ◽  
Qingyuan Yang ◽  
Liqun Zhang ◽  
...  
Keyword(s):  
Molecular Simulation ◽  
Simulation Study ◽  
Polymer Particle ◽  
Particle Interactions ◽  
Payne Effect ◽  
Strain Dependent

scholarly journals Exploring the Role of Nanoparticles in Enhancing Mechanical Properties of Hydrogel Nanocomposites

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 882 ◽  
Author(s):  
Josergio Zaragoza ◽  
Scott Fukuoka ◽  
Marcus Kraus ◽  
James Thomin ◽  
Prashanth Asuri
Keyword(s):  
Mechanical Properties ◽  
Elastic Moduli ◽  
Maximum Modulus ◽  
Polymer Particle ◽  
Particle Interactions ◽  
Polyacrylamide Hydrogels ◽  
The Past ◽  
Wide Range ◽  
Hydrogel Nanocomposites

Over the past few decades, research studies have established that the mechanical properties of hydrogels can be largely impacted by the addition of nanoparticles. However, the exact mechanisms behind such enhancements are not yet fully understood. To further explore the role of nanoparticles on the enhanced mechanical properties of hydrogel nanocomposites, we used chemically crosslinked polyacrylamide hydrogels incorporating silica nanoparticles as the model system. Rheological measurements indicate that nanoparticle-mediated increases in hydrogel elastic modulus can exceed the maximum modulus that can be obtained through purely chemical crosslinking. Moreover, the data reveal that nanoparticle, monomer, and chemical crosslinker concentrations can all play an important role on the nanoparticle mediated-enhancements in mechanical properties. These results also demonstrate a strong role for pseudo crosslinking facilitated by polymer–particle interactions on the observed enhancements in elastic moduli. Taken together, our work delves into the role of nanoparticles on enhancing hydrogel properties, which is vital to the development of hydrogel nanocomposites with a wide range of specific mechanical properties.

scholarly journals Role of lipid composition on the structural and mechanical features of axonal membranes: a molecular simulation study

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Marzieh Saeedimasine ◽  
Annaclaudia Montanino ◽  
Svein Kleiven ◽  
Alessandra Villa
Keyword(s):  
Molecular Simulation ◽  
Simulation Study ◽  
Lipid Composition
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