scholarly journals Structural Changes of Bagasse dusring the Homogeneous Esterification with Maleic Anhydride in Ionic Liquid 1-Allyl-3-methylimidazolium Chloride

Polymers ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 433 ◽  
Author(s):  
Huihui Wang ◽  
Wei Chen ◽  
Xueqin Zhang ◽  
Yi Wei ◽  
Aiping Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Maleic Anhydride ◽  
Structural Changes

Homogeneous Esterification of Xylan-Rich Hemicelluloses with Maleic Anhydride in Ionic Liquid

2010 ◽  
Vol 11 (12) ◽  
pp. 3519-3524 ◽  
Author(s):  
Xin-wen Peng ◽  
Jun-li Ren ◽  
Run-cang Sun
Keyword(s):  
Ionic Liquid ◽  
Maleic Anhydride

Dynamical Response of the Electric Double Layer Structure of the DEME-TFSI Ionic Liquid to Potential Changes Observed by Time-Resolved X-ray Reflectivity

2016 ◽  
Vol 230 (4) ◽  
Author(s):  
Wolfgang Voegeli ◽  
Etsuo Arakawa ◽  
Tadashi Matsushita ◽  
Osami Sakata ◽  
Yusuke Wakabayashi
Keyword(s):  
Ionic Liquid ◽  
Double Layer ◽  
Time Scale ◽  
Electric Double Layer ◽  
Structural Changes ◽  
Layer Structure ◽  
Dynamical Response ◽  
Relaxation Processes ◽  
Time Resolved ◽  
X Ray

AbstractThe interface between the N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl)imide (DEME-TFSI) ionic liquid and a gold (111) surface was investigated with time-resolved X-ray reflectivity in order to clarify the dynamics of structural changes of the electric double layer after changing the electrode potential. In the experiment, the potential was switched repeatedly between +1.5 V and −1.5 V every 2 s or every 0.3 s, while measuring the specular X-ray reflectivity. When the potential was switched every 2 s, the time dependence of the reflectivity was different from that of the accumulated charge. This indicates structural relaxation processes that occur on a slower time scale than the acummulation of the charge at the electric double layer.When the potential was switched every 0.3 s, on the other hand, the reflectivity changes followed the evolution of the charge of the electric double layer within the experimental precision, indicating that slow relaxation processes without charge transfer do not contribute significantly to structural changes at this time scale.

scholarly journals Chemical and structural changes of pretreated empty fruit bunch (EFB) in ionic liquid-cellulase compatible system for fermentability to bioethanol

3 Biotech ◽  
2018 ◽  
Vol 8 (5) ◽  
Author(s):  
Amal A. Elgharbawy ◽  
Md. Zahangir Alam ◽  
Muhammad Moniruzzaman ◽  
Nassereldeen Ahmad Kabbashi ◽  
Parveen Jamal
Keyword(s):  
Ionic Liquid ◽  
Structural Changes ◽  
Empty Fruit Bunch ◽  
Compatible System

Study on the Chemical Modification of Cellulose in Ionic Liquid with Maleic Anhydride

2012 ◽  
Vol 581-582 ◽  
pp. 287-291 ◽  
Author(s):  
Hai Feng Li ◽  
Huan Li ◽  
Xuan Zhong ◽  
Xin Da Li ◽  
Magdi E. Gibril ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Infrared Spectroscopy ◽  
Reaction Time ◽  
Thermogravimetric Analysis ◽  
Maleic Anhydride ◽  
Chemical Modification ◽  
Cotton Cellulose ◽  
Optimal Conditions ◽  
Mass Ratio

Dissolution and regeneration of cotton cellulose using ionic liquids as solvent was investigated. In this paper, modification of celluloses with maleic anhydride (MA) was carried out in ionic liquid,1-allyl-3-methylimidazolium chloride(AmimCl).The maleylation celluloses with degrees of substitution (DS) between 0.85and 1.46 were accessible in IL. The effects of reaction time, temperature and mass ratio of the MA in cellulose were investigated. These maleylation celluloses were characterized by infrared spectroscopy, thermogravimetric analysis (TGA). Experiments showed that the optimal conditions for grafting were: mass ratio of maleic anhydride and cotton cellulose 0.8; reaction time of 90 min; temperature of 80 °C.

Thickness-dependent structural arrangement in nano-confined imidazolium-based ionic liquid films

2015 ◽  
Vol 17 (6) ◽  
pp. 4152-4159 ◽  
Author(s):  
Michael Rouha ◽  
Peter T. Cummings
Keyword(s):  
Ionic Liquid ◽  
Structural Changes ◽  
Liquid Films ◽  
Adsorbed Film ◽  
Structural Arrangement ◽  
Interfacial Layers

Nano-confined ionic liquid interfacial layers showing lateral and perpendicular structural changes dependent on thickness of adsorbed film.

scholarly journals Giant reversible, facet-dependent, structural changes in a correlated-electron insulator induced by ionic liquid gating

2015 ◽  
Vol 112 (4) ◽  
pp. 1013-1018 ◽  
Author(s):  
Jaewoo Jeong ◽  
Nagaphani B. Aetukuri ◽  
Donata Passarello ◽  
Steven D. Conradson ◽  
Mahesh G. Samant ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Electric Fields ◽  
Room Temperature ◽  
Structural Changes ◽  
Electron System ◽  
Metallic State ◽  
Crystal Facet ◽  
Correlated Electron ◽  
High Electric Fields ◽  
Insulating Phase

The use of electric fields to alter the conductivity of correlated electron oxides is a powerful tool to probe their fundamental nature as well as for the possibility of developing novel electronic devices. Vanadium dioxide (VO2) is an archetypical correlated electron system that displays a temperature-controlled insulating to metal phase transition near room temperature. Recently, ionic liquid gating, which allows for very high electric fields, has been shown to induce a metallic state to low temperatures in the insulating phase of epitaxially grown thin films of VO2. Surprisingly, the entire film becomes electrically conducting. Here, we show, from in situ synchrotron X-ray diffraction and absorption experiments, that the whole film undergoes giant, structural changes on gating in which the lattice expands by up to ∼3% near room temperature, in contrast to the 10 times smaller (∼0.3%) contraction when the system is thermally metallized. Remarkably, these structural changes are fully reversible on reverse gating. Moreover, we find these structural changes and the concomitant metallization are highly dependent on the VO2 crystal facet, which we relate to the ease of electric-field–induced motion of oxygen ions along chains of edge-sharing VO6 octahedra that exist along the (rutile) c axis.

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