scholarly journals Dissolution kinetics of cellulose in ionic liquids: Raman spectral mapping

2020 ◽  
Author(s):  
Tyler Cosby ◽  
Ashlee Aiello ◽  
David P. Durkin ◽  
Paul C. Trulove
Keyword(s):  
Ionic Liquids ◽  
Dissolution Kinetics ◽  
Spectral Mapping ◽  
Raman Spectral ◽  
Kinetics Of

scholarly journals Dissolution kinetics of cellulose in ionic liquids: Raman spectral mapping

2020 ◽  
Author(s):  
Tyler Cosby ◽  
Ashlee Aiello ◽  
David P. Durkin ◽  
Paul C. Trulove
Keyword(s):  
Ionic Liquids ◽  
Dissolution Kinetics ◽  
Spectral Mapping ◽  
Raman Spectral ◽  
Kinetics Of

Decrystallization Kinetics of Cotton Yarns in Ionic Liquids – Raman Spectral Mapping

2020 ◽  
Vol MA2020-02 (59) ◽  
pp. 3019-3019
Author(s):  
Tyler Cosby ◽  
Ashlee Aiello ◽  
David P. Durkin ◽  
Paul C. Trulove
Keyword(s):  
Ionic Liquids ◽  
Spectral Mapping ◽  
Cotton Yarns ◽  
Raman Spectral ◽  
Kinetics Of

Kinetics of ionic liquid-facilitated cellulose decrystallization by Raman spectral mapping

Cellulose ◽  
2021 ◽  
Author(s):  
Tyler Cosby ◽  
Ashlee Aiello ◽  
David P. Durkin ◽  
Paul C. Trulove
Keyword(s):  
Ionic Liquid ◽  
Spectral Mapping ◽  
Raman Spectral ◽  
Kinetics Of

Disintegration and dissolution kinetics of wood chips in ionic liquids

Holzforschung ◽  
2011 ◽  
Vol 65 (4) ◽  
Author(s):  
Jörn Viell ◽  
Wolfgang Marquardt
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Specific Surface ◽  
Surface Area ◽  
Dissolution Kinetics ◽  
Wood Chips ◽  
Large Specific Surface Area ◽  
Microscopic Studies ◽  
Kinetics Of

Abstract Ionic liquids are able to dissolve polysaccharides and lignin, but there is only scarce knowledge about the dissolution of native wood. In the present paper, wood was dissolved by the ionic liquid 1-ethyl-3-methylimidazolium acetate (EMIMAc). A quantitative balance of the dissolved compounds is presented and the investigations are complemented by in situ microscopy of native wood in EMIMAc. The resulting dissolution kinetics in EMIMAc reveals distinct differences between spruce and beech. While particles of 0.1–0.5 mm of spruce dissolve slowly (up to 40% after 24 h), beech is dissolved more efficiently (75% after 24 h and 90% after 72 h). Wood chips of 10 mm length show similar dissolution kinetics and lignin yields of up to 10%. Microscopic studies reveal a disintegration of wood in EMIMAc into cells with large specific surface area, and differences in dissolution between spruce and beech were observed. These findings explain the size-independent dissolution of wood in EMIMAc and may open up new opportunities for the pretreatment of wood in ionic liquids.

scholarly journals Thermal Stability and Decomposition Kinetics of 1-Alkyl-2,3-Dimethylimidazolium Nitrate Ionic Liquids: TGA and DFT Study

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2560
Author(s):  
Jianwen Meng ◽  
Yong Pan ◽  
Fan Yang ◽  
Yanjun Wang ◽  
Zhongyu Zheng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Density Functional Theory ◽  
Ionic Liquids ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Nitrogen Atmosphere ◽  
Decomposition Kinetics ◽  
Heating Rates ◽  
Functional Theory ◽  
Kinetics Of

The thermal stability and decomposition kinetics analysis of 1-alkyl-2,3-dimethylimidazole nitrate ionic liquids with different alkyl chains (ethyl, butyl, hexyl, octyl and decyl) were investigated by using isothermal and nonisothermal thermogravimetric analysis combined with thermoanalytical kinetics calculations (Kissinger, Friedman and Flynn-Wall-Ozawa) and density functional theory (DFT) calculations. Isothermal experiments were performed in a nitrogen atmosphere at 240, 250, 260 and 270 °C. In addition, the nonisothermal experiments were carried out in nitrogen and air atmospheres from 30 to 600 °C with heating rates of 5, 10, 15, 20 and 25 °C/min. The results of two heating modes, three activation energy calculations and density functional theory calculations consistently showed that the thermal stability of 1-alkyl-2,3-dimethylimidazolium nitrate ionic liquids decreases with the increasing length of the alkyl chain of the substituent on the cation, and then the thermal hazard increases. This study could provide some guidance for the safety design and use of imidazolium nitrate ionic liquids for engineering.

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