Improved Cellulose by Ionic Liquid Mixture with Solid Acid Catalysis and Its Application in Polyethylene Glycol Liquefaction

Abstract

Ionic liquid (IL), [BMIM]Cl-water was applied in cellulose pretreatment process and the pretreated cellulose was used in subsequent polyethylene glycol liquefaction process as a new application method. Cellulose recovery rate and molecular weight value of pretreated cellulose were investigated to understand the influence of IL-water mixtures by adding the different amount of catalysis on cellulose crystalline structure. Gel permeation chromatograph, X-ray diffraction, Fourier transform infrared spectrometer and thermo gravimetric/differential thermal analysis were used to clarify the changes of pretreated cellulose. The results showed that the pretreated cellulose was improved in crystalline structure, molecular weight distribution and thermal stability. The liquefied residues from untreated cellulose and pretreated cellulose were considered as a significant index to determine the effect of IL-water mixture on cellulose. It suggested that the lower molecular weight of cellulose was obtained, the crystalline structure was disrupted and less order was formed. The liquefied residues result suggested that the lower residues at the latter stages of the reaction from the pretreated cellulose were observed.

Response surface method to optimize the preparation of carboxymethyl cellulose from corn peel agricultural waste

“…The crystal structure of cellulose fibres extracted from corn peel decreased after carboxymethylation. Similar results were observed by de Santos et al 24 , Chen et al 31 , and Terinte et al 32 . The diffraction peak of cellulose fibres at 16°2 θ and 22°2θ decreased and disappeared after the reaction with MCA and transformed into amorphous phase.…”

Nanostructured cigarette wrapper encapsulated PDMS‐RGO sandwiched composite for high performance EMI shielding applications

“…[28] For CW, the peaks at 16.40 and 22.87 are responsible for the presence of cellulose in the CW. [29] The presence of Al in the CW has been confirmed by the XRD analysis which is well matched with the JCPDS file 04-0787. [30] The crystal planes (111), (200), (220), and (311) of Al are depicted by peaks at 2θ 38.54 , 44.87 , 65.12 , and 78.26 , respectively.…”

Rapid and Efficient Cationization of Cotton Cellulose with Girard's Reagent T using Dialdehyde Linkages

“…2. 10 Eq. 2 I 002 is the height of the crystalline peak and I am is the height of the amorphous shoulder.…”

“…It appears that the cellulose I structure was preserved during the treatment. 10 In addition, the crystallinity index (Cr.I), crystallite size (L), and crystallite interior chains (X) values were all in the range of 84.3 ± 2, 6 ± 0.5, and 0.65 ± 0.02, respectively, regardless of the dialdehyde type and molar ratio with GT. These values were practically the same as that of untreated cotton, again attesting that the treatment mainly occurred in amorphous regions.…”