Anion-Specific Adsorption of Carboxymethyl Cellulose on Cellulose
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| Title: | Anion-Specific Adsorption of Carboxymethyl Cellulose on Cellulose |
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| Authors: | Arumughan, Vishnu, Özeren, Hüsamettin Deniz, Hedenqvist, Mikael, Skepö, Marie, Nypelö, Tiina, Hasani, Merima, Larsson, Anette |
| Contributors: | Lund University, Profile areas and other strong research environments, Lund University Profile areas, LU Profile Area: Light and Materials, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Lunds universitets profilområden, LU profilområde: Ljus och material, Originator, Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Nanoscience and Semiconductor Technology, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Nanovetenskap och halvledarteknologi, Originator, Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), NanoLund: Centre for Nanoscience, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), NanoLund: Centre for Nanoscience, Originator, Lund University, Faculty of Science, LINXS - Institute of advanced Neutron and X-ray Science, Lunds universitet, Naturvetenskapliga fakulteten, LINXS Institute of advanced Neutron and X-ray Science, Originator, Lund University, Faculty of Science, Department of Chemistry, Physical and theoretical chemistry, Computational Chemistry, Lunds universitet, Naturvetenskapliga fakulteten, Kemiska institutionen, Enheten för fysikalisk och teoretisk kemi, Beräkningskemi, Originator, Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), eSSENCE: The e-Science Collaboration, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), eSSENCE: The e-Science Collaboration, Originator |
| Source: | Langmuir : the ACS journal of surfaces and colloids. 39(42):15014-15021 |
| Subject Terms: | Engineering and Technology, Materials Engineering, Paper, Pulp and Fiber Technology, Teknik, Materialteknik, Pappers, massa- och fiberteknik, Natural Sciences, Chemical Sciences, Physical Chemistry (including Surface- and Colloid Chemistry), Naturvetenskap, Kemi, Fysikalisk kemi (Här ingår: Yt- och kolloidkemi) |
| Description: | 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 watermolecules and resulting in greater entropy gain once released from the surface, thus increasing CMC adsorption. |
| Access URL: | https://doi.org/10.1021/acs.langmuir.3c01924 |
| Database: | SwePub |
Nájsť tento článok vo Web of Science | 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 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 watermolecules and resulting in greater entropy gain once released from the surface, thus increasing CMC adsorption. |
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| ISSN: | 07437463 15205827 |
| DOI: | 10.1021/acs.langmuir.3c01924 |