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Effects of kinetics on structures of aggregates leading to fibrillar networks
© The Royal Society of Chemistry 2018. In this chapter, we first introduce the correlation between the rheological properties and the hierarchical crystal/fibrillar network structure of molecular gels. We then summarize the types of junction zones, the most important parameters of the fibrillar networks that govern the rheological properties of molecular gels. Although transient junctions are hard to control, permanent junctions can be manipulated by different approaches based on the control of thermodynamics and kinetics. For kinetics control, the strong interfacial adsorption properties of polymer additives and surfactants have an important influence on the fibrillar network formation of several molecular gels. We discuss different kinetics models including the Avrami model, the Dickson model, and their modified versions that have been used to follow the nucleation-growth mechanism and fractal dimensions of the fibrillar networks of gels. The influences of molecular chirality on gel formation and the annealing effects on gel stability are covered briefly. Finally, we introduce different computational models that have been used to understand the early stage aggregation/nucleation of macromolecular systems and discuss their potential for modelling the initial nucleation of molecular gelators.
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Title of book
Molecular gels : structure and dynamicsVolume
25Series
Monographs in Supramolecular ChemistryChapter number
4Pagination
88 - 128Publisher
Royal Society of ChemistryPlace of publication
Cambridge, Eng.Publisher DOI
ISSN
1368-8642eISSN
2041-7144ISBN-13
9781788011112ISBN-10
1788011112Language
engPublication classification
B1 Book chapterExtent
9Editor/Contributor(s)
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