Dispersion Stability, Microstructure and Phase Transition of Anisotropic Nanodiscs

Pujala, Ravi Kumar

ISBN 10: 3319045547 / ISBN 13: 9783319045542

Editore: Springer International Publishing AG, 2014

Recognized as an outstanding contribution to the field, this thesis is a comprehensive exploration of physical phenomena in nano clay systems. It features the author's data on the first experimental observation of a system with high aspect ratio nanodiscs. Series: Springer Theses. Num Pages: 154 pages, 69 black & white illustrations, 26 colour illustrations, biography. BIC Classification: TBN; TDCB; TGM. Category: (P) Professional & Vocational. Dimension: 235 x 155 x 11. Weight in Grams: 426. . 2014. Hardback. . . . . Codice articolo V9783319045542

Riassunto:

This thesis explores the dispersion stability, microstructure and phase transitions involved in the nanoclay system. It describes the recently discovered formation of colloidal gels via two routes: the first is through phase separation and second is by equilibrium gelation and includes the first reported experimental observation of a system with high aspect ratio nanodiscs. The phase behavior of anisotropic nanodiscs of different aspect ratio in their individual and mixed states in aqueous and hydrophobic media is investigated. Distinct phase separation, equilibrium fluid and equilibrium gel phases are observed in nanoclay dispersions with extensive aging. The work then explores solution behavior, gelation kinetics, aging dynamics and temperature-induced ordering in the individual and mixed states of these discotic colloids. Anisotropic ordering dynamics induced by a water-air interface, waiting time and temperature in these dispersions were studied in great detail along with aggregation behavior of nanoplatelets in hydrophobic environment of alcohol solutions.

Dalla quarta di copertina: This thesis explores the dispersion stability, microstructure and phase transitions involved in the nanoclay system. It describes the recently discovered formation of colloidal gels via two routes: the first is through phase separation and second is by equilibrium gelation and includes the first reported experimental observation of a system with high aspect ratio nanodiscs. The phase behavior of anisotropic nanodiscs of different aspect ratio in their individual and mixed states in aqueous and hydrophobic media is investigated. Distinct phase separation, equilibrium fluid and equilibrium gel phases are observed in nanoclay dispersions with extensive aging. The work then explores solution behavior, gelation kinetics, aging dynamics and temperature-induced ordering in the individual and mixed states of these discotic colloids. Anisotropic ordering dynamics induced by a water-air interface, waiting time and temperature in these dispersions were studied in great detail along with aggregation behavior of nanoplatelets in hydrophobic environment of alcohol solutions.

Dati bibliografici

Titolo: Dispersion Stability, Microstructure and ...
Casa editrice: Springer International Publishing AG
Data di pubblicazione: 2014
Legatura: Rilegato
Condizione: New