CaltechAUTHORS
  A Caltech Library Service

Nonelectrostatic Adsorption of Polyelectrolytes and Mediated Interactions between Solid Surfaces

Balzer, Christopher and Jiang, Jian and Marson, Ryan L. and Ginzburg, Valeriy V. and Wang, Zhen-Gang (2021) Nonelectrostatic Adsorption of Polyelectrolytes and Mediated Interactions between Solid Surfaces. Langmuir, 37 (18). pp. 5483-5493. ISSN 0743-7463. doi:10.1021/acs.langmuir.1c00139. https://resolver.caltech.edu/CaltechAUTHORS:20210429-132053968

[img] PDF (Salt effects on adsorbed amount without electrostatic correlation and adsorption and interaction figures for different bulk monomer concentrations) - Supplemental Material
See Usage Policy.

952kB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20210429-132053968

Abstract

Polymer-mediated interaction between two solid surfaces is directly connected to the properties of the adsorbed polymer layers. Nonelectrostatic interactions with a surface can significantly impact the adsorption of polyelectrolytes to charged surfaces. We use a classical density functional theory to study the effect of various polyelectrolyte solution properties on the adsorption and interaction between two like-charged surfaces. Our results show that nonelectrostatic interactions not only enhance polyelectrolyte adsorption but can also result in qualitatively different salt effects with respect to the adsorbed amount. In particular, we observe decreasing, increasing, and a previously unreported nonmonotonic behavior in the adsorbed amount of polymer with added salt under the conditions studied, although the nonmonotonic regime only occurs for a narrow range in the parameter space. With sufficient nonelectrostatic adsorption, the adsorbed polymer layers produce a long-range repulsive barrier that is strong enough to overcome dispersive interactions that cause surfaces to attract. Concurrently, a short-range bridging attraction is observed when the two polyelectrolyte layers span both the surfaces. Both the repulsive barrier and bridging attraction depend on the charge density of the polymer backbone and the bulk salt concentration but not on the chain length in the semidilute regime studied.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1021/acs.langmuir.1c00139DOIArticle
ORCID:
AuthorORCID
Balzer, Christopher0000-0002-9767-8437
Jiang, Jian0000-0003-4171-5275
Ginzburg, Valeriy V.0000-0002-2775-5492
Wang, Zhen-Gang0000-0002-3361-6114
Additional Information:© 2021 American Chemical Society. Received: January 15, 2021; Revised: April 14, 2021; Published: April 29, 2021. The Dow Chemical Company is acknowledged for partly funding the work and permission to publish the results. C.B. is supported by the U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research, Department of Energy Computational Science Graduate Fellowship under Award Number DE-SC0020347. We thank Dr. Chang Yun Son, Dr. Anthony Van Dyk, Dr. Thomas Kalantar, and Dr. Christopher Tucker for helpful discussions. Author Contributions. C.B. and J.J. contributed equally. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
Dow Chemical CompanyUNSPECIFIED
Department of Energy (DOE)DE-SC0020347
Subject Keywords:Salts, Electrostatics, Adsorption, Polyelectrolytes, Polymers
Issue or Number:18
DOI:10.1021/acs.langmuir.1c00139
Record Number:CaltechAUTHORS:20210429-132053968
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210429-132053968
Official Citation:Nonelectrostatic Adsorption of Polyelectrolytes and Mediated Interactions between Solid Surfaces. Christopher Balzer, Jian Jiang, Ryan L. Marson, Valeriy V. Ginzburg, and Zhen-Gang Wang. Langmuir 2021 37 (18), 5483-5493; DOI: 10.1021/acs.langmuir.1c00139
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108873
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:29 Apr 2021 21:14
Last Modified:12 May 2021 16:27

Repository Staff Only: item control page