Ordered polyelectrolyte assembly at the oil-water interface.

Proceedings of the National Academy of Sciences of the United States of America
Daniel K BeamanG L Richmond

Abstract

Polyelectrolytes (PEs) are widely used in applications such as water purification, wastewater treatment, and mineral recovery. Although much has been learned in past decades about the behavior of PEs in bulk aqueous solutions, their molecular behavior at a surface, and particularly an oil-water interface where many of their applications are most relevant, is largely unknown. From these surface spectroscopic and thermodynamics studies we report the unique molecular characteristics that several common polyelectrolytes, poly(acrylic acid) and poly(methylacrylic acid), exhibit when they adsorb at a fluid interface between water and a simple insoluble organic oil. These PEs are found to adsorb to the interface from aqueous solution in a multistepped process with a very thin initial layer of oriented polymer followed by multiple layers of randomly oriented polymer. This additional layering is thwarted when the PE conformation is constrained. The adsorption/desorption process is highly pH dependent and distinctly different than what might be expected from bulk aqueous phase behavior.

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Citations

Nov 18, 2015·Journal of Chemical Theory and Computation·Nicholas A Valley, Geraldine L Richmond
Dec 25, 2015·Physical Chemistry Chemical Physics : PCCP·Patrick BalzerowskiHuib J Bakker
Jun 29, 2017·Soft Matter·Shiyi Qin, Xin Yong
Mar 13, 2018·Chemical Communications : Chem Comm·Songling HanJianxiang Zhang
Oct 16, 2015·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Masashi OhnoMasanori Fujinami
Apr 11, 2018·Proceedings of the National Academy of Sciences of the United States of America·Deheng YangWei-Tao Liu
Jan 22, 2013·Nanoscale·Zifu Li, To Ngai
Aug 2, 2017·Proceedings of the National Academy of Sciences of the United States of America·Jennifer K HenselGeraldine L Richmond
Dec 6, 2019·Journal of the American Chemical Society·Azhad U ChowdhuryBenjamin Doughty
Jul 9, 2021·ACS Applied Materials & Interfaces·Lu LinBenjamin Doughty
Oct 2, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Daniel K BeamanGeraldine L Richmond
Aug 24, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Ellen J Robertson, Geraldine L Richmond
Jan 5, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Guolei XiangXun Wang
Sep 30, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Chi ZhangZhan Chen
Sep 6, 2012·The Journal of Physical Chemistry. B·Maria MontagnaLeonardo Guidoni
Oct 12, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Shu LiuCarol Korzeniewski
May 16, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Brandon K SchabesGeraldine L Richmond
Jul 17, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Emma TranGeraldine L Richmond
Jun 20, 2020·ACS Applied Materials & Interfaces·Azhad U ChowdhuryBenjamin Doughty
Aug 17, 2018·The Journal of Physical Chemistry. B·Brandon K SchabesGeraldine L Richmond
Nov 6, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Nicholas A ValleyGeraldine L Richmond
Sep 4, 2021·Angewandte Chemie·Saman HosseinpourWolfgang Peukert
Dec 31, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Michael TsueiNicholas L Abbott

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