Pretreatment of Fir Powder and Its Dissolution in Ionic Liquid of 1-(2-Hydroxylethyl)-3-Ethylene Imidazolium Chloride

2011 ◽  
Vol 236-238 ◽  
pp. 87-90
Author(s):  
Li Ying Guo
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Dissolution Rate ◽  
Mass Fraction ◽  
Wood Powder ◽  
Imidazolium Chloride ◽  
Chemical Structures ◽  
Good Solubility ◽  
Temperature And Pressure ◽  
Pressure Dissolution

Ionic liquid, 1-(2-hydroxylethyl)-3-ethylene imidazolium chloride ([HeVIM]Cl) was synthesized and its chemical structures was examined by FTIR and 1HNMR. Fir powder was extracted with a mixture of benzene/ethanol or activated with 25% (mass fraction) NaOH under normal temperature and pressure, microwave and high pressure. Dissolution of the pretreated wood powder in [HeVIM]Cl by microwave (90°C, 400w) was studied. The results showed that the ionic liquid [HeVIM]Cl exhibited a good solubility. Wood powder pretreated with 25% NaOH under high pressure had the lowest crystallinity (2.4%) and the highest dissolution rate (21.6%).

Comparative Studies on Synthesis of Imidazole Ionic Liquids and Their Solubility for Wood by Microwave

2010 ◽  
Vol 113-116 ◽  
pp. 1744-1748 ◽  
Author(s):  
Li Ying Guo ◽  
Mu Zhang
Keyword(s):  
High Pressure ◽  
Ionic Liquids ◽  
Mass Fraction ◽  
Wood Fiber ◽  
Hydroxyl Group ◽  
Wood Powder ◽  
Chemical Structures ◽  
High Pressure Studies ◽  
Before And After ◽  
Temperature And Pressure

The present work deals with the synthesis of various imidazole ionic liquids [BMIM]Cl, [AMIM]Cl, [AEIM]Cl, [HeEIM]Cl and [HeVIM]Cl, the chemical structures of ionic liquids by FTIR and 1HNMR, the pretreatment of wood powder as extracted with a mixture of benzene/ethanol or activated with 25% (mass fraction) NaOH under normal temperature and pressure, microwave and high pressure, studies the solubility of ionic liquids on the wood powder by microwave (90°C, 400w), and analyses the microstructure of the wood before and after dissolution as measured by SEM. The result shows that all the ionic liquids can dissolve the wood fiber directly, ionic liquids containing hydroxyl group exhibit better solubility. Wood powder pretreated with 25% NaOH under high pressure has the lowest crystallinity (2.4%) and the highest dissolution rate. The solubility of [HeVIM]Cl is the best, which approach to 21.6%.

Synthesis of Ionic Liquid and its Application in Duabanga Grandiflora Wood Powder as Green Solvent

2010 ◽  
Vol 113-116 ◽  
pp. 407-411 ◽  
Author(s):  
Cheng Chen ◽  
Jian Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Dissolution Mechanism ◽  
Wood Powder ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Chloride ◽  
Chemical Structures ◽  
Before And After ◽  
Naoh Solution ◽  
Ft Ir

In this paper, a kind of imidazolium ionic liquid, 1-butyl-3-methyl imidazolium chloride ( [BMIM]Cl) was synthesized, and the chemical structures of the ionic liquids were characterizaed by FT-IR and NMR. The solubilities of the ionic liquid for duabanga grandiflora powder activated with different modified conditions were studied respectively. Dissolution rate of wood pretreated with about 25% NaOH solution was the best , due to the reduction of the hydrogen bond applied force. The chemical structure and crystal behavior of duabanga grandiflorar powder before and after dissolution were analyzed by FT-IR and XRD, respectively. The dissolution mechanism has also been discussed. The results showed that the ionic liquids had a good solubility for cellulose in activated duabanga grandiflorar powder. Micrographs of the original wood powder，regenerated wood powder and the residua were quite different from each others. The regenerated wood appeared some micro voids special construction.

Combined Raman Scattering and X-ray Diffraction Study of Phase Transition of the Ionic Liquid [BMIM][TFSI] Under High Pressure

2015 ◽  
Vol 44 (10) ◽  
pp. 2106-2116 ◽  
Author(s):  
Jie Wu ◽  
Xiang Zhu ◽  
Haining Li ◽  
Lei Su ◽  
Kun Yang ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Ionic Liquid ◽  
Raman Scattering ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray

Universal Charge Quenching and Stability of Proteins in 1-Methyl-3-alkyl (Hexyl/Octyl) Imidazolium Chloride Ionic Liquid Solutions

2012 ◽  
Vol 116 (36) ◽  
pp. 11065-11074 ◽  
Author(s):  
Kamla Rawat ◽  
H. B. Bohidar
Keyword(s):  
Ionic Liquid ◽  
Imidazolium Chloride ◽  
Liquid Solutions

Imidazolium chloride-based ionic liquid-assisted improvement of lipase activity in organic solvents

2011 ◽  
Vol 11 (3) ◽  
pp. 259-263 ◽  
Author(s):  
Somayeh Daneshjoo ◽  
Neda Akbari ◽  
Abbas Akhavan Sepahi ◽  
Bijan Ranjbar ◽  
Ramezan-Ali Khavarinejad ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Organic Solvents ◽  
Lipase Activity ◽  
Imidazolium Chloride

Measured temperature and pressure dependence of Vp and Vs in compacted, polycrystalline sI methane and sII methane–ethane hydrate

2003 ◽  
Vol 81 (1-2) ◽  
pp. 47-53 ◽  
Author(s):  
M B Helgerud ◽  
W F Waite ◽  
S H Kirby ◽  
A Nur
Keyword(s):  
High Pressure ◽  
Shear Wave ◽  
Pressure Dependence ◽  
Gas Hydrate ◽  
Pressure Vessel ◽  
Wave Speed ◽  
Measured Temperature ◽  
Shear Wave Speed ◽  
Temperature And Pressure ◽  
Fixed End

We report on compressional- and shear-wave-speed measurements made on compacted polycrystalline sI methane and sII methane–ethane hydrate. The gas hydrate samples are synthesized directly in the measurement apparatus by warming granulated ice to 17°C in the presence of a clathrate-forming gas at high pressure (methane for sI, 90.2% methane, 9.8% ethane for sII). Porosity is eliminated after hydrate synthesis by compacting the sample in the synthesis pressure vessel between a hydraulic ram and a fixed end-plug, both containing shear-wave transducers. Wave-speed measurements are made between –20 and 15°C and 0 to 105 MPa applied piston pressure. PACS No.: 61.60Lj

Dissolution of Cellulose in [Amim]Cl/Lithium Salts Solvents System

2012 ◽  
Vol 535-537 ◽  
pp. 1100-1103 ◽  
Author(s):  
Wei Xiao Liao ◽  
Jun Song ◽  
Bo Wen Cheng ◽  
Jie Mei
Keyword(s):  
Ionic Liquid ◽  
Temperature Increase ◽  
Mass Fraction ◽  
Lithium Salts ◽  
Dissolution Behavior ◽  
Cellulose Solution ◽  
High Concentration

Lithium salts were dissolved in ionic liquid [Amim]Cl, and their dissolution behavior were tested by turbidimeter. It is found that the solubility of LiCl in [Amim]Cl is up to 14g/100g [Amim]Cl at 70°C, and it keeps growing as the temperature increase. Turbidity of cellulose solution in [Amim]Cl at 70°C was obtained, but the solubility of high concentration cellulose solution could not be demonstrated accurately in this way. Cellulose solutions with [Amim]Cl or [Amim]Cl/lithium salts as solvents at different temperature were obtained, in which the lithium salts were 1wt%(mass fraction of [Amim]Cl), polarization microscope was used to observe the dissolution behavior of cellulose. The solubility of cellulose would increased as temperature rose, and the solubility of cellulose in [Amim]Cl/1wt%LiCl reached 11.9%(mass fraction of [Amim]Cl) at 80°C, which was higher than in [Amim]Cl 9.4% at 80°C. It is found that the addition of lithium salts into [Amim]Cl can really improve the solubility of cellulose than in [Amim]Cl.

Influence of Processing Parameters and Different Content of Tib2 Ceramics on the Properties of Composites Sintered by High Pressure -High Temperature (HP-HT) Method

2014 ◽  
Vol 59 (1) ◽  
pp. 205-209 ◽  
Author(s):  
I. Sulima ◽  
L. Jaworska ◽  
P. Figiel
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Processing Parameters ◽  
Structure Changes ◽  
High Pressure High Temperature ◽  
Mechanical And Physical Properties ◽  
Temperature And Pressure ◽  
Different Content ◽  
Scanning Electron ◽  
Properties Of Composites

Abstract In this paper the properties of the austenitic stainless steel reinforced with various volume fractions of TiB2 ceramics have been studied. The high pressure- high temperature (HP-HT) method of sintering was applied to the formation of composites. Samples were sintered at pressure of 5 and 7 ±0.2 GPa and temperatures of 1273 K and 1573 K. For the tested materials, the relative density, Young’s modulus and hardness were measured. In order to investigate the structure changes, the scanning electron microscope was used. The obtained results show that the temperature and pressure influence on the mechanical and physical properties of the investigated composites.

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