Micellization and adsorption of a series of succinimide dispersants

Langmuir : the ACS Journal of Surfaces and Colloids
Yu Shen, Jean Duhamel

Abstract

The efficiency of a series of nonionic dispersants at stabilizing carbon-rich particles in oil was evaluated. The dispersants were synthesized by coupling a polyamine to two polyisobutylenes terminated at one end with a succinic anhydride (PIBSA). Their chemical composition was characterized by FTIR absorption. The associative strength of the dispersants was determined from their ability to self-associate in solution into reverse micelles. Their critical micelle concentration (CMC) and aggregation number (Nagg) were determined by fluorescence in an apolar solvent, namely hexane. The associative strength of the dispersants was found to increase with increasing number of secondary amines in the polyamine core. The adsorption isotherms describing the adsorption of the dispersants onto carbon black particles were determined and showed the existence of two binding regimes for the dispersants having more amines in their polar core. Much stronger binding occurred at dispersant concentration lower than the CMC. The weaker binding observed at dispersant concentrations larger than the CMC is believed to result from the dispersants having to compete between micellization and adsorption at concentrations above the CMC.

References

Jan 26, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·You-Yeon WonJacob I Emert
Dec 23, 2006·Environmental Health Perspectives·Maureen R Gwinn, Val Vallyathan

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Citations

Aug 26, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Mary E ParentDick Henze
Mar 19, 2014·The Journal of Physical Chemistry. B·Solmaz PirouzJean Duhamel
Jul 21, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Matthew GacekJohn C Berg
Oct 27, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Edward L Michor, John C Berg
Nov 29, 2012·Physical Chemistry Chemical Physics : PCCP·Gregory N Smith, Julian Eastoe
May 3, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Joohyung LeeSven Holger Behrens
Oct 21, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Joohyung LeeSven Holger Behrens
Jan 29, 2021·Physical Chemistry Chemical Physics : PCCP·Priya PandeyS S V Ramakumar
May 16, 2015·The Journal of Physical Chemistry. B·Joohyung LeeSven Holger Behrens
Nov 3, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Fatemeh KhalkhalChinedum O Osuji

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