Next Article in Journal
An Overview of LEDs’ Effects on the Production of Bioactive Compounds and Crop Quality
Next Article in Special Issue
One-Bath Pretreatment for Enhanced Color Yield of Ink-Jet Prints Using Reactive Inks
Previous Article in Journal
In Vitro Innervation as an Experimental Model to Study the Expression and Functions of Acetylcholinesterase and Agrin in Human Skeletal Muscle
Open AccessArticle

Acetylation of Microcrystalline Cellulose by Transesterification in AmimCl/DMSO Cosolvent System

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
Author to whom correspondence should be addressed.
Molecules 2017, 22(9), 1419;
Received: 3 July 2017 / Revised: 21 August 2017 / Accepted: 24 August 2017 / Published: 27 August 2017
(This article belongs to the Special Issue Cellulose Chemical Modifications—Towards Sustainable Materials)
Recently, IL/cosolvent systems have generated a lot of interest as cellulose-dissolving solvents and reaction media for various kinds of cellulose modification. In the present study, both 1-allyl-3-methylimidazolium chloride (AmimCl)/dimethyl sulfoxide (DMSO) and AmimCl/N,N-dimethylformamide (DMF) systems were employed to synthesize cellulose acetate by transesterification. Microcrystalline cellulose, 1,8-diazabicyclo[5.4.0]undec-7-ene and isopropenyl acetate were chosen as the raw material, catalyst and acetylation reagent, respectively. The results revealed that DMSO was a suitable cosolvent for the transesterification in the homogeneous solution. Moreover, DMSO had a positive effect on the reaction as the cosolvent under the given conditions and the degree of the substitution of cellulose acetate could be significantly enhanced through increasing the molar ratio of DMSO. The synthesized products were characterized by Fourier transform infrared (FT-IR) spectroscopy, 1H and 13C nuclear magnetic resonance spectroscopy (1H-NMR and 13C-NMR), correlation spectroscopy (COSY), heteronuclear single quantum correlation (HSQC) spectroscopy, and X-ray diffraction (XRD) to confirm the chemical and physical structure of the cellulose acetate generated. The thermal properties were also evaluated using thermogravimetric analysis (TGA)/derivative thermogravimetry (DTG). View Full-Text
Keywords: cellulose acetate; ionic liquid; cosolvent; transesterification; DMSO cellulose acetate; ionic liquid; cosolvent; transesterification; DMSO
Show Figures

Figure 1

MDPI and ACS Style

Wang, H.; Wen, X.; Zhang, X.; Liu, C. Acetylation of Microcrystalline Cellulose by Transesterification in AmimCl/DMSO Cosolvent System. Molecules 2017, 22, 1419.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop