A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Imidazolium Gemini ionic liquids for regulating facilely the swelling and dispersion of montmorillonite in water
Abstract The imidazolium Gemini ionic liquids (IL), with alkyl groups ranging from butyl to tetradecyl as tail chains and polyoxyethylene group as linker chain, were synthesized and used as novel efficient modifiers for flexibly controlling the swelling and dispersion of Na-montmorillonite (NaMt). The correlation between swelling behavior and structure of imidazolium Gemini IL was investigated. Too long or too short tail chains caused greater swelling, obtaining smaller particle size and reductive face-to-face stacking degree of layers. Based on the change of water contact angles, the increased stability of modified Mt in water indicated that the hydrophobicity of the tail chains played an important role in impeding the entry of water molecules into the interlayer. Zeta potential, Fourier transform infrared spectra and X-ray photoelectron spectroscopy validated the cation exchange between imidazolium Gemini IL and Na+, and confirmed the adsorption site. The molecular arrangement and intercalation were determined through adsorption behavior, interlayer space of Mt and simulation of molecular size. The imidazolium Gemini IL covered the Mt layers in monolayer, finally taking lateral (short tail chains) or paraffin (long tail chains) arrangement. The investigation will provide useful guidance for modifying Mt to obtain desirable properties and broadening the practical application of Mt hybrids.
Graphical abstract Display Omitted
Highlights Novel Gemini imidazolium ILs are used to control the hydration and swelling of NaMt. The dispersion and aggregation of Mt. particles is adjusted by changing tail chains. The hydrophobicity of Mt is easily regulated to affect its stability in water. The intercalation model is proposed based on interlayer spacing and molecular size.
Imidazolium Gemini ionic liquids for regulating facilely the swelling and dispersion of montmorillonite in water
Abstract The imidazolium Gemini ionic liquids (IL), with alkyl groups ranging from butyl to tetradecyl as tail chains and polyoxyethylene group as linker chain, were synthesized and used as novel efficient modifiers for flexibly controlling the swelling and dispersion of Na-montmorillonite (NaMt). The correlation between swelling behavior and structure of imidazolium Gemini IL was investigated. Too long or too short tail chains caused greater swelling, obtaining smaller particle size and reductive face-to-face stacking degree of layers. Based on the change of water contact angles, the increased stability of modified Mt in water indicated that the hydrophobicity of the tail chains played an important role in impeding the entry of water molecules into the interlayer. Zeta potential, Fourier transform infrared spectra and X-ray photoelectron spectroscopy validated the cation exchange between imidazolium Gemini IL and Na+, and confirmed the adsorption site. The molecular arrangement and intercalation were determined through adsorption behavior, interlayer space of Mt and simulation of molecular size. The imidazolium Gemini IL covered the Mt layers in monolayer, finally taking lateral (short tail chains) or paraffin (long tail chains) arrangement. The investigation will provide useful guidance for modifying Mt to obtain desirable properties and broadening the practical application of Mt hybrids.
Graphical abstract Display Omitted
Highlights Novel Gemini imidazolium ILs are used to control the hydration and swelling of NaMt. The dispersion and aggregation of Mt. particles is adjusted by changing tail chains. The hydrophobicity of Mt is easily regulated to affect its stability in water. The intercalation model is proposed based on interlayer spacing and molecular size.
Imidazolium Gemini ionic liquids for regulating facilely the swelling and dispersion of montmorillonite in water
He, Yang (author) / Zhou, Lihua (author) / Gou, Shaohua (author) / Qian, Xiaolin (author) / Tian, Zhihao (author) / Chen, Junwen (author) / Liao, Jie (author) / Huo, Jing (author) / Gou, Guangjun (author)
Applied Clay Science ; 219
2022-02-14
Article (Journal)
Electronic Resource
English
The swelling of montmorillonite in nonaqueous liquids
| British Library Conference Proceedings | 2001
New Environmental-friend Material-Imidazolium-based Ionic Liquids
| British Library Online Contents | 2006
Degradation behavior of cellulose in imidazolium-based ionic liquids
| British Library Online Contents | 2012
Additive Toxicities of Six Imidazolium Ionic Liquids on Photobacterium
| British Library Conference Proceedings | 2013