Effect of alkyl chain length and hydroxyl group functionalization on the surface properties of imidazolium ionic liquids

2011 ◽  
Vol 13 (30) ◽  
pp. 13518 ◽  
Author(s):  
Alfonso S. Pensado ◽  
Margarida F. Costa Gomes ◽  
José N. Canongia Lopes ◽  
Patrice Malfreyt ◽  
Agílio A. H. Pádua
Keyword(s):  
Ionic Liquids ◽  
Surface Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Hydroxyl Group ◽  
Imidazolium Ionic Liquids

scholarly journals Influence of newly synthesized imidazolium ionic liquids on activated sludge process

2015 ◽  
Vol 41 (4) ◽  
pp. 40-48 ◽  
Author(s):  
Dorota Gendaszewska ◽  
Ewa Liwarska-Bizukojć ◽  
Cedric Maton ◽  
Christian V. Stevens
Keyword(s):  
Ionic Liquids ◽  
Activated Sludge ◽  
Chain Length ◽  
Alkyl Chain ◽  
Freundlich Isotherm ◽  
Alkyl Chain Length ◽  
Activated Sludge Process ◽  
Biomass Growth ◽  
Imidazolium Ionic Liquids ◽  
Sludge Flocs

Abstract This study investigates the influence of four imidazolium ionic liquids (ILs) present in wastewater on the activated sludge process. In addition, experiments with inactivated sludge to assess the capacity of this sorbent to remove ILs from the wastewater were conducted. It occurred that the presence of ionic liquids in wastewater reduces biomass growth and size of the sludge flocs. The strongest effect has been found for IL 6 (1-hexyl-2H-3-methyl-4,5-dimethylimidazolium iodide) with the longest alkyl chain length. Also, the degree of ILs removal increases with the alkyl chain length and decreases with the increase of initial concentration of ILs in wastewater. IL 6 reaches the highest degree of ILs removal from wastewater but inhibits the biomass growth and growth of sludge flocs in a greater extent than other tested compounds. Moreover, it was confirmed that newly synthesized ionic liquids can be adsorbed onto inactivated sludge. IL 6 could be adsorbed in a higher degree than other ionic liquids. This adsorption was described by Langmuir isotherm, whereas adsorption of other ionic liquids was described by Freundlich isotherm.

Influence of hydroxyl group functionalization and alkyl chain length on physicochemical and antiwear properties of hexafluorophosphate imidazolium ionic liquids

2014 ◽  
Vol 66 (3) ◽  
pp. 443-451 ◽  
Author(s):  
Yanqiu Xia ◽  
Zhihong Wang ◽  
Yanxin Song
Keyword(s):  
Ionic Liquids ◽  
Chain Length ◽  
Corrosion Behavior ◽  
Friction And Wear ◽  
Alkyl Chain ◽  
Electrochemical Corrosion ◽  
Alkyl Chain Length ◽  
Hydroxyl Group ◽  
Content Type ◽  
Electrochemical Corrosion Behavior

Purpose – The aim of the present paper is that three long-chain hydroxyethyl alkylimidazolium hexafluorophosphate ionic liquids (ILs) were synthesized and evaluated as lubricants for steel-steel contacts at room temperature and boundary lubrication conditions. Hydroxyethyl functional group and alkyl chain length effect on the physicochemical and fretting tribological behaviors of the ILs was comparatively investigated, as compared to traditional dialkylimidazolium ILs. Design/methodology/approach – The fretting friction and wear tests were carried out using an Optimol SRV-IV oscillating reciprocating friction and wear tester. The worn surface was observed and analyzed by scanning electron microscope and X-ray photoelectron spectroscopy. The electrochemical corrosion behavior of copper disks in selected imidazolium-based ionic liquids was studied using a CHI660B electrochemical workstation. Findings – This can be seen by comparing the results for the non-hydroxyl ILs and hydroxyl ILs that the latter exhibited the littler friction coefficient, the smaller wear volume, although the latter electrochemical corrosion behavior of copper disks is slightly higher than the former. The results also revealed that the ILs with a longer alkyl chain displayed larger viscosities, better anti-corrosion capacities, higher hydrophobic properties and more excellent friction-reducing and anti-wear performance than those with a shorter alkyl chain. Originality/value – This work might offer new knowledge in the design and application of new ILs as lubricants; it also confirms some in-depth physicochemical questions, e.g. the function mechanism, the correlations between structure and performance. Additionally, a proposed interaction model between the ILs and the friction substrate has been given.

Study of the Alkyl Chain Length on Laccase Stability and Enzymatic Kinetic with Imidazolium Ionic Liquids

2011 ◽  
Vol 164 (4) ◽  
pp. 524-533 ◽  
Author(s):  
Oscar Rodríguez ◽  
Raquel O. Cristóvão ◽  
Ana P. M. Tavares ◽  
Eugénia A. Macedo
Keyword(s):  
Ionic Liquids ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Imidazolium Ionic Liquids

scholarly journals Interfacial structuring of non-halogenated imidazolium ionic liquids at charged surfaces: effect of alkyl chain length

2020 ◽  
Vol 22 (16) ◽  
pp. 8450-8460
Author(s):  
Seiya Watanabe ◽  
Georgia A. Pilkington ◽  
Anna Oleshkevych ◽  
Patricia Pedraz ◽  
Milad Radiom ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Storage ◽  
Chain Length ◽  
Electric Fields ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Imidazolium Ionic Liquids ◽  
Charged Surfaces ◽  
Interfacial Structures ◽  
Storage Solutions

Control of the interfacial structures of ionic liquids (ILs) at charged interfaces is important to many of their applications, including in energy storage solutions, sensors and advanced lubrication technologies utilising electric fields.

Uptake and accumulation of imidazolium ionic liquids in rice seedlings: Impacts of alkyl chain length

Chemosphere ◽  
2020 ◽  
Vol 242 ◽  
pp. 125228 ◽  
Author(s):  
Nuzahat Habibul ◽  
Mihriban Ilmurat ◽  
Zumrat Habibul ◽  
Yi Hu ◽  
Xiaoli Ma
Keyword(s):  
Ionic Liquids ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Rice Seedlings ◽  
Imidazolium Ionic Liquids
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