Extended dissolution studies of cellulose in imidazolium based ionic liquids

Vitz, Jürgen; Erdmenger, Tina; Haensch, Claudia; Schubert, Ulrich S.

doi:10.1039/b818061j

Cited by 417 publications

(279 citation statements)

References 33 publications

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“…The broadband at 3416 cm -1 , attributed to the stretching of OH hydroxyl groups of agar that participate in hydrogen bond formation in inter-and intramolecular bonds or in hydrogen inter and intramolecular bond formation, shifts to shorter wavelengths numbers with the addition of ILs [20,21]. The bands at 2934 and 2887 cm -1 refer to the CH asymmetrical stretching, which increase in intensity due to its presence in both glycerol and in the ILs [22,23]. The band at 2360 cm -1 is due to the CO 2 from air and at 1653 cm -1 is due to adsorbed water.…”

Section: Results and Discussion 31 Ftir Analysismentioning

confidence: 99%

“…The band at 2360 cm -1 is due to the CO 2 from air and at 1653 cm -1 is due to adsorbed water. Samples with ILs present a new band at 1559 cm -1 , probably due to C=C imidazolium ring [24] assigned to be at 1562 cm -1 [23]. SO 4 ] can be due to C-O-SO 3 asymmetric stretching.…”

Section: Results and Discussion 31 Ftir Analysismentioning

confidence: 99%

“…SO 4 ] can be due to C-O-SO 3 asymmetric stretching. The bands at 1174 cm -1 can be assigned to C-O-C from agar as in the case of cellulose dissolved in the 1-butyl-3-methylimidazolium chloride [23] and at 1168 cm -1 to ring in-plane assymetric stretching, C-C and (N)CH 2 stretching [25]. The stretching of the COH alcohol bond shifts from 1087 to 1038 cm -1 , which is probably due to the hydrogen bond formation between glycerol and macromolecule.…”

Section: Results and Discussion 31 Ftir Analysismentioning

confidence: 99%

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Investigation of polymer electrolyte based on agar and ionic liquids

Leones¹,

Sentanin²,

Rodrigues³

et al. 2012

Express Polym. Lett.

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Abstract. The possibility to use natural polymer as ionic conducting matrix was investigated in this study. Samples of agarbased electrolytes with different ionic liquids were prepared and characterized by physical and chemical analyses. Samples of solvent-free electrolytes were prepared and characterized by ionic conductivity measurements, thermal analysis, electrochemical stability, X-ray diffraction, scanning electron microscopy and Fourier Transform infrared spectroscopy. Electrolyte samples are thermally stable up to approximately 190°C. All the materials synthesized are semicrystalline. The electrochemical stability domain of all samples is about 2.0 V versus Li/Li + . The preliminary studies carried out with electrochromic devices (ECDs) incorporating optimized compositions have confirmed that these materials may perform as satisfactory multifunctional component layers in the field of 'smart windows', as well as ECD-based devices.

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Section: Results and Discussion 31 Ftir Analysismentioning

confidence: 99%

Section: Results and Discussion 31 Ftir Analysismentioning

confidence: 99%

Section: Results and Discussion 31 Ftir Analysismentioning

confidence: 99%

See 1 more Smart Citation

Investigation of polymer electrolyte based on agar and ionic liquids

Leones¹,

Sentanin²,

Rodrigues³

et al. 2012

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…However, chloride salts of ILs are highly hygroscopic, have high melting temperatures, and have high liquid viscosities, which makes their handling difficult (Vitz et al 2009). On the other hand, carboxylate containing IL such [OAc] − anion was used for comparison.…”

Section: Effect Of Ilsmentioning

confidence: 99%

Effect of Ionic Liquids on Oil Palm Biomass Fiber Dissolution

et al. 2016

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Ionic liquids (ILs) were used in the dissolution of oil palm biomass, primarily empty fruit bunches (EFB), oil palm fronds (OPF), and oil palm trunks (OPT). These ILs acted as alternative solvents that could dissolve biopolymer molecules up to 5 wt.%. The IL, [emim][OAc] was the best solvent, dissolving EFB, OPF, and OPT of 99%, 100%, and 97%, respectively, at 100 ⁰C and 16 h. The lignin content of the regenerated oil palm solids for all biomass was quantified and showed significant reduction up to 35%; fiber length was also reduced as the heating time increased after IL dissolution. Also, the effect of ILs on the different parts of oil palm biomass fibers was thoroughly studied. The lignin content was quantified.

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“…However, the substitution of the -OH groups by direct etherification is quite difficult due to the relatively inert hydrogen in the choline cation (Vigier and Jérôme 2013). The allylation of the -OH groups may be an alternative substitution process based on experiences to form allylfunctionalized ILs (Zhang et al 2005;Vitz et al 2009;Ohira et al 2012;Tang and Row 2013;Zhang et al 2015).…”

Section: Introductionmentioning

confidence: 99%