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Anion-Specific Adsorption of Carboxymethyl Cellulose on Cellulose

Arumughan, Vishnu ; Özeren, Hüsamettin Deniz ; Hedenqvist, Mikael ; Skepö, Marie LU ; Nypelö, Tiina ; Hasani, Merima and Larsson, Anette LU (2023) In Langmuir : the ACS journal of surfaces and colloids 39(42). p.15014-15021
Abstract

Integration of fiber modification step with a modern pulp mill is a resource efficient way to produce functional fibers. Motivated by the need to integrate polymer adsorption with the current pulping system, anion-specific effects in carboxymethylcellulose (CMC) adsorption have been studied. The QCM-D adsorption experiments revealed that CMC adsorption to the cellulose model surface is prone to anion-specific effects. A correlation was observed between the adsorbed CMC and the degree of hydration of the co-ions present in the magnesium salts. The presence of a chaotropic co-ion such as nitrate increased the adsorption of CMC on cellulose compared to the presence of the kosmotropic sulfate co-ion. However, anion-specificity was not... (More)

Integration of fiber modification step with a modern pulp mill is a resource efficient way to produce functional fibers. Motivated by the need to integrate polymer adsorption with the current pulping system, anion-specific effects in carboxymethylcellulose (CMC) adsorption have been studied. The QCM-D adsorption experiments revealed that CMC adsorption to the cellulose model surface is prone to anion-specific effects. A correlation was observed between the adsorbed CMC and the degree of hydration of the co-ions present in the magnesium salts. The presence of a chaotropic co-ion such as nitrate increased the adsorption of CMC on cellulose compared to the presence of the kosmotropic sulfate co-ion. However, anion-specificity was not significant in the case of salts containing zinc cations. The hydration of anions determines the distribution of the ions at the interface. Chaotropic ions, such as nitrates, are likely to be distributed near the chaotropic cellulose surface, causing changes in the ordering of water molecules and resulting in greater entropy gain once released from the surface, thus increasing CMC adsorption.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir : the ACS journal of surfaces and colloids
volume
39
issue
42
pages
15014 - 15021
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85175356779
  • pmid:37817605
ISSN
0743-7463
DOI
10.1021/acs.langmuir.3c01924
language
English
LU publication?
yes
id
e4b6d651-0a98-419b-87a7-8e9c87bc775d
date added to LUP
2023-10-24 10:11:26
date last changed
2024-04-22 19:20:30
@article{e4b6d651-0a98-419b-87a7-8e9c87bc775d,
  abstract     = {{<p>Integration of fiber modification step with a modern pulp mill is a resource efficient way to produce functional fibers. Motivated by the need to integrate polymer adsorption with the current pulping system, anion-specific effects in carboxymethylcellulose (CMC) adsorption have been studied. The QCM-D adsorption experiments revealed that CMC adsorption to the cellulose model surface is prone to anion-specific effects. A correlation was observed between the adsorbed CMC and the degree of hydration of the co-ions present in the magnesium salts. The presence of a chaotropic co-ion such as nitrate increased the adsorption of CMC on cellulose compared to the presence of the kosmotropic sulfate co-ion. However, anion-specificity was not significant in the case of salts containing zinc cations. The hydration of anions determines the distribution of the ions at the interface. Chaotropic ions, such as nitrates, are likely to be distributed near the chaotropic cellulose surface, causing changes in the ordering of water molecules and resulting in greater entropy gain once released from the surface, thus increasing CMC adsorption.</p>}},
  author       = {{Arumughan, Vishnu and Özeren, Hüsamettin Deniz and Hedenqvist, Mikael and Skepö, Marie and Nypelö, Tiina and Hasani, Merima and Larsson, Anette}},
  issn         = {{0743-7463}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{42}},
  pages        = {{15014--15021}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Langmuir : the ACS journal of surfaces and colloids}},
  title        = {{Anion-Specific Adsorption of Carboxymethyl Cellulose on Cellulose}},
  url          = {{http://dx.doi.org/10.1021/acs.langmuir.3c01924}},
  doi          = {{10.1021/acs.langmuir.3c01924}},
  volume       = {{39}},
  year         = {{2023}},
}