The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite

The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite

The adsorption of a series of cationic surfactants with different chain lengths and structures on a non-swelling clay surface (sodium kaolinite) has been studied by microelectrophoresis and adsorption isotherms. It was found that an increase in the number of CH 2 groups in the shorter alkyl chain of...

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Main Authors: Jinben Wang, Buxing Han, Ming Dai, Haike Yan, Zhixin Li, R.K. Thomas
Format: Article
Language:English
Published: Hindawi - SAGE Publishing 1998-07-01
Series:Adsorption Science & Technology
Online Access:https://doi.org/10.1177/026361749801600706
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spelling doaj-a98d10d36d474577af65bb0ebe33c3b92021-04-02T09:18:30ZengHindawi - SAGE PublishingAdsorption Science & Technology0263-61742048-40381998-07-011610.1177/026361749801600706The Role of Chain Length and Structure in Surfactant Adsorption at Na-KaoliniteJinben Wang0Buxing Han1Ming Dai2Haike Yan3Zhixin Li4R.K. Thomas5 Group III, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, People's Republic of China Group III, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, People's Republic of China Group III, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, People's Republic of China Group III, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, People's Republic of China Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UKThe adsorption of a series of cationic surfactants with different chain lengths and structures on a non-swelling clay surface (sodium kaolinite) has been studied by microelectrophoresis and adsorption isotherms. It was found that an increase in the number of CH 2 groups in the shorter alkyl chain of the double-chain surfactant has much less effect on the adsorption behaviour than changing the length of the alkyl chain in the single-chain surfactants. It is inferred that the effective hydrophobicity of the shorter chains in these double-chain surfactants is reduced by their intramolecular association with the longer chain. A comparison of adsorption and micellization leads to an empirical, quantitative description of the effects of alkyl chain length and structure on adsorption. The adsorption mechanism of cationic surfactants on to Na-kaolinite was discussed.https://doi.org/10.1177/026361749801600706
collection DOAJ
language English
format Article
sources DOAJ
author Jinben Wang
Buxing Han
Ming Dai
Haike Yan
Zhixin Li
R.K. Thomas
spellingShingle Jinben Wang
Buxing Han
Ming Dai
Haike Yan
Zhixin Li
R.K. Thomas
The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite
Adsorption Science & Technology
author_facet Jinben Wang
Buxing Han
Ming Dai
Haike Yan
Zhixin Li
R.K. Thomas
author_sort Jinben Wang
title The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite
title_short The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite
title_full The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite
title_fullStr The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite
title_full_unstemmed The Role of Chain Length and Structure in Surfactant Adsorption at Na-Kaolinite
title_sort role of chain length and structure in surfactant adsorption at na-kaolinite
publisher Hindawi - SAGE Publishing
series Adsorption Science & Technology
issn 0263-6174
2048-4038
publishDate 1998-07-01
description The adsorption of a series of cationic surfactants with different chain lengths and structures on a non-swelling clay surface (sodium kaolinite) has been studied by microelectrophoresis and adsorption isotherms. It was found that an increase in the number of CH 2 groups in the shorter alkyl chain of the double-chain surfactant has much less effect on the adsorption behaviour than changing the length of the alkyl chain in the single-chain surfactants. It is inferred that the effective hydrophobicity of the shorter chains in these double-chain surfactants is reduced by their intramolecular association with the longer chain. A comparison of adsorption and micellization leads to an empirical, quantitative description of the effects of alkyl chain length and structure on adsorption. The adsorption mechanism of cationic surfactants on to Na-kaolinite was discussed.
url https://doi.org/10.1177/026361749801600706
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