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Effects of kinetics on structures of aggregates leading to fibrillar networks

chapter
posted on 2018-01-01, 00:00 authored by Jingliang LiJingliang Li, Z S Zhang, X Y Liu
© 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.

History

Title of book

Molecular gels : structure and dynamics

Volume

25

Series

Monographs in Supramolecular Chemistry

Chapter number

4

Pagination

88 - 128

Publisher

Royal Society of Chemistry

Place of publication

Cambridge, Eng.

ISSN

1368-8642

eISSN

2041-7144

ISBN-13

9781788011112

ISBN-10

1788011112

Language

eng

Publication classification

B1 Book chapter

Extent

9

Editor/Contributor(s)

R Weiss