Dissolution Condition Effect on Cellulose in Ionic Liquid and the Recycling of Ionic Liquid

2014 ◽  
Vol 644-650 ◽  
pp. 5207-5210
Author(s):  
Yan Hao ◽  
Ting Ting Li ◽  
Xue Lian Ma ◽  
Gui Bao Guo
Keyword(s):  
Ionic Liquid ◽  
Elevated Temperature ◽  
Room Temperature ◽  
Degree Of Polymerization ◽  
Room Temperature Ionic Liquids ◽  
Dissolution Time ◽  
Vacuum Drying ◽  
Regenerated Cellulose ◽  
Condition Effect ◽  
Homogeneous Modification

Recently, room temperature ionic liquids (RTILs) have been widely used in dissolution, homogeneous modification of cellulose. Cellulose only could be dissolved in RTILs at elevated temperature. Herein, effect of dissolution condition on microcrystalline cellulose in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid was studied. The results indicated that the degree of polymerization (DP) of regenerated cellulose decreased from 161 to 83 with the increasing of dissolution temperature in the range of 70 °C to 110 °C, whereas the DP was affected by dissolution time slightly. Moreover, after dissolution [Bmim]Cl could be recycled by distillation and vacuum drying. The recycled [Bmim]Cl also had good dissolving capability of cellulose, and its FTIR spectra was similar to that of original [Bmim]Cl.

Electrocapillary Curves for the Hg/Ionic Liquid Interface

2009 ◽  
Vol 64 (3-4) ◽  
pp. 263-268 ◽  
Author(s):  
Andrzej Lewandowski ◽  
Tomasz Majkowski ◽  
Maciej Galinski
Keyword(s):  
Surface Tension ◽  
Ionic Liquid ◽  
Electrode Potential ◽  
Room Temperature ◽  
Narrow Range ◽  
Room Temperature Ionic Liquids ◽  
Second Derivative ◽  
Drop Volume ◽  
Potential Of Zero Charge ◽  
Weight Drop

Abstract Electrocapillary curves (surface tension γ as a function of the electrode potential E) for a series of room-temperature ionic liquids (RTILs) were measured using a mercury dropping electrode with the drop-weight (drop-volume) technique. The curves γ = f (E) for the Hg/RTIL interface have one maximum and may be approximated with a polynomial of sixth-order. There are no ‘humps’ in the curves. The interfacial tension of the Hg/RTIL system changes with potential E in a monotonic way. The second derivative of γ = f (E) leads to a polynomial of fourth order, indicating the capacitance of the Hg/RTIL interface. The potential of zero charge is within a relatively narrow range. The specific capacitance at the minimum is of the order 10 μF/cm2

Impact of Cationic Molecular Length of Ionic Liquid Electrolytes on Cell Performances of 18650 Supercapacitors

2021 ◽  
Author(s):  
Phatsawit Wuamprakhon ◽  
Ruttiyakorn Donthongkwa ◽  
Kanit Hantanasirisakul ◽  
Vinich Promarak ◽  
Jumras Limtrakul ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Porous Carbon ◽  
Room Temperature ◽  
Series Resistance ◽  
Room Temperature Ionic Liquids ◽  
Specific Cell ◽  
Equivalent Series Resistance ◽  
Molecular Length ◽  
Cell Capacitance

The specific cell capacitance, equivalent series resistance (ESR) and equivalent distributed resistance (EDR) of porous carbon-based supercapacitors linearly depend on the cation molecular length (1 dimension) of room-temperature ionic liquids.

scholarly journals Synthesis of Quaternary Ammonium Room-Temperature Ionic Liquids and their Application in the Dissolution of Cellulose

2019 ◽  
Vol 9 (9) ◽  
pp. 1750 ◽  
Author(s):  
Yao-Hsuan Tseng ◽  
Yu-Yin Lee ◽  
Shih-Hsun Chen
Keyword(s):  
Ionic Liquids ◽  
Quaternary Ammonium ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Regenerated Cellulose ◽  
Exchange Reactions ◽  
Cellulose Films ◽  
Structural Regularity ◽  
Rapid Dissolution ◽  
Regenerated Cellulose Films

In this work, several kinds of quaternary ammonium-based room-temperature ionic liquids (QA RTILs) are synthesized by alkylation and ion-exchange reactions for the rapid dissolution of cellulose. The applications of cellulose materials have been limited due to their poor solubility in conventional organic solvents, because of a high degree of structural regularity and a large number of hydrogen bonds. The prepared ionic liquids were identified by nuclear magnetic resonance, elemental analysis, and liquid chromatography-mass spectrometry. The results indicated that N,N,N-triethylhexan-1-aminium acetate (N6222OAc), tetrahexylammonium acetate (N6666OAc), and N,N,N,N′,N′,N′-hexaethyldecane-1,10-diaminium acetate (C10(N222OAc)2) exhibited good cellulose-dissolution without any pretreatment. The regenerated cellulose films with a low degree of crystallization of the cellulose II phase were also prepared easily in this process using N6222OAc due to its polar and small cation. These QA RTILs can be used as non-derivatizing solvents for cellulose and can also be easily recycled because of their thermostable and nonvolatile properties.

scholarly journals Effect of Room Temperature Ionic Liquids for Electroless Nickel Plating on Acrylonitrile Butadiene Styrene Plastic

2019 ◽  
Vol 25 (3) ◽  
pp. 276-280
Author(s):  
Canan URAZ
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Acrylonitrile Butadiene Styrene ◽  
Electroless Nickel ◽  
Room Temperature Ionic Liquids ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
X Ray ◽  
Butadiene Styrene

In this study, electroless nickel (EN) plating on acrylonitrile butadiene styrene (ABS) engineering plastic using room temperature ionic liquids (RTIL) was studied. Electroless plating is a fundamental step in metal plating on plastic. This step makes the plastic conductive and makes it possible to a homogeneous and hard plating without using any hazardous and unfriendly chemical such as palladium, tin, etc. In the industry there are many distinct chemical materials both catalysts and activation solutions for the electroless bath which is one of the most important parts of the process. In this study the effects of the ionic liquid, plating time, and sand paper size were investigated on electroless nickel plating. The etching and the plating processes were performed with environmentally friendly chemicals instead of the chromic and sulphuric acids used in the traditional processes. Experiments were carried out with and without ionic liquid, EMIC, 1-ethyl-3-methyl imidazolium chloride (C6H11N2Cl), and with 400, 500 and 800 grit sandpaper with the application of the sand attrition process and 70, 80, and 90 °C bath temperatures with 30, 60, and 90 minutes of deposition time. The surface morphology and the thickness of deposit analysis were performed using the Fischer scope X-Ray XDL-B System, X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). Due to the results of the experiments and analysis, the electroless nickel plating on ABS plastic was a success. The best plating was obtained at 5.010 μm as the maximum plating thickness, at 90 min of plating time and 80 °C as the plating bath temperature for electroless nickel plating on ABS plastic whit the surface activated with 800 grit sandpaper using EMIC ionic liquid. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20116

Novel Ionic Liquid Lubricants for Aerospace and MEMS

2005 ◽  
Author(s):  
Barbara J. Kinzig ◽  
Paul Sutor ◽  
Gregory W. Sawyer ◽  
Alison Rennie ◽  
Pamela Dickrell ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Molten Salts ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Melting Points

Room temperature ionic liquids (RTILs) are molten salts with melting points at or below room temperature. RTILs have recently been recognized as novel lubricants. Only a few have previously been evaluated.

scholarly journals Rechargeable aluminum batteries: effects of cations in ionic liquid electrolytes

RSC Advances ◽  
2019 ◽  
Vol 9 (20) ◽  
pp. 11322-11330 ◽  
Author(s):  
Guanzhou Zhu ◽  
Michael Angell ◽  
Chun-Jern Pan ◽  
Meng-Chang Lin ◽  
Hui Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Solvent Free ◽  
Room Temperature Ionic Liquids ◽  
Liquid Electrolytes

Room temperature ionic liquids (RTILs) are solvent-free liquids comprised of densely packed cations and anions. Properties of Py13Cl–AlCl3 ILs were studied and compared with EMIC-AlCl3 ILs for use as electrolyte in Al–graphite battery.

A Facile Approach to Prepare Regenerated Cellulose/Graphene Nanoplatelets Nanocomposite Using Room-Temperature Ionic Liquid

2012 ◽  
Vol 12 (7) ◽  
pp. 5233-5239 ◽  
Author(s):  
Shaya Mahmoudian ◽  
Mat Uzir Wahit ◽  
Muhammad Imran ◽  
A. F. Ismail ◽  
Harintharavimal Balakrishnan
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Graphene Nanoplatelets ◽  
Regenerated Cellulose

Ionic Liquid-Regenerated Cellulose Beads as Solid Support Matrices for Papain Immobilization

2012 ◽  
Vol 535-537 ◽  
pp. 2349-2352
Author(s):  
Song Kun Yao ◽  
Qiu Jin Li ◽  
Wei Zhang ◽  
Ji Xian Gong ◽  
Jian Fei Zhang
Keyword(s):  
Ionic Liquid ◽  
Enzyme Activity ◽  
Room Temperature ◽  
Immobilized Enzyme ◽  
Solid Support ◽  
Cross Linking ◽  
Regenerated Cellulose ◽  
Ester Hydrochloride ◽  
Imidazolium Chloride ◽  
Scanning Electron

A beads based on cellulose and the room temperature ionic liquid 1-butyl-3-methyl imidazolium chloride ([Bmim]Cl) was prepared. Regenerated cellulose beads were modified with silane, and characterized by scanning electron microscopy. Papain was immobilized on the beads used two different methods including glutaraldehyde and covalent cross-linking method. The immobilized enzyme activity of bead was determinated by BAEE (N-benzoyl- DL-arginine ethyl ester hydrochloride) determination. According to the enzyme activity and immobilization rate compared with covalent cross-linking method, glutaraldehyde cross-linking method is more suitable for amino-modified.

Microemulsions with an Ionic Liquid Surfactant and Room Temperature Ionic Liquids As Polar Pseudo-Phase

2009 ◽  
Vol 113 (2) ◽  
pp. 465-473 ◽  
Author(s):  
Oliver Zech ◽  
Stefan Thomaier ◽  
Pierre Bauduin ◽  
Thomas Rück ◽  
Didier Touraud ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Ionic Liquid Surfactant
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