Temperature dependent volume expansion of microgel in nonequilibria

Abstract

We propose to adopt a non-isothermal and colloid type cluster-cluster aggregation stochastic model aimed at comprehending the temperature driven and polymer swelling accompanying volume expansion encountered in microgels. The nonequilibrium nature of the process is captured by describing expansion characteristics with simplified power laws, indicating the scalability of properties with time and temperature. Additionally, molecular dynamics simulations of the presented mechanism for a chosen biopolymer have been performed. This can be of interest for experimenters working in the field of nonequilibrium phase transitions, and fairly prospectively, within the area of thermal phonon-involving technology. In these areas, scanning the system's temperature, or sometimes tuning similar dissipation-addressing physical factors, such as pH, appears to be a fairly pivotal examination case.

Effect of Chitosan Deacetylation on Its Affinity to Type III Collagen: A Molecular Dynamics Study

“…The beneficial effects of collagen blends for joint health are associated with healing natural tribological systems, namely synovial fluid and articular cartilage. Moreover, the hydrophilicity of hydrogels is closely related to gel-like and hydration involving propensity at the expense of their sol-type character, especially when being affected by slight temperature changes experienced around the physiological reference point [59,60]. Therefore, the characterization of intermolecular interactions, including the analysis of hydrophilic regions capable of hydrogen bond formation and hydrophobic regions responsible for van der Waals forces and dispersion (colloid type) interactions, is useful in the design of new bio-materials.…”

(Nano)granules Involving Aggregation at a Passage to the Nanoscale as Viewed in Terms of Diffusive Heisenberg Relation

“…In turn, to keep the needle-shaped system as a whole we have assumed that the Van der Waals attraction ought to be at play while creating the structure; virtually, the electrostatic Coulomb/dipolar attraction can be of favor too. On the other hand, it qualitatively looks like we would efficiently confine to a line (or a chain) of a granules-containing system or the like [8,2].…”

“…In the limit of h going to zero, i.e. while escaping from the respective quantum domain, the (soft) material evolution in x-space would attain a lowvalued 'subdiffusive' (and, otherwise non-quantum) mode, nearly causing to trap the atoms or molecules absorbed by any of the adjacent granules [1,2].…”

“…The monomers can be identical, or they can have one or more substituted chemical groups. Of course, these differences between monomers can affect granules' properties such as solubility, flexibility, or mechanical stability [1,2].…”

“…There is no doubt, that a challenging task emerges on a quite general level, namely, how to extract from a given, often viscoelastic nucleation-growth framework [2], reliable control of the size and shape of nanoparticles/nanocrystals, especially if the size of the objects is blurred solely in the nanoscale, i.e. in a typical range of about 1-100 nm.…”