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Mechanocatalytic Solvent-Free Esterification of Sugarcane Bagasse

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China
College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
Authors to whom correspondence should be addressed.
Polymers 2018, 10(3), 282;
Received: 17 January 2018 / Revised: 17 February 2018 / Accepted: 6 March 2018 / Published: 8 March 2018
PDF [3877 KB, uploaded 8 March 2018]


Esterification is a versatile way to produce the derivatives of lignocellulose with developed properties. However, the traditional heterogeneous esterification of lignocellulose suffered from the drawbacks of low efficiency, additional reaction medium and heating. In the present study, an efficient method was developed to produce the functionalized sugarcane bagasse (SCB) by ball milling without any additional solvents and heating. The effects of pulverization time, rotation speed, the kind of linear chain anhydrides, the ratio of anhydrides to SCB, with or without pyridine catalyst and the dosage of catalyst were investigated on weight percent gain (WPG) of SCB esters. The results indicated that the high efficiency of this mechanocatalystic esterification was probably due to the destroyed crystalline structure and the promoted penetration of the esterifying reagent onto SCB bulk caused by ball milling. The maximum WPG of SCB acetate, propionate and butyrate reached 33.3%, 33.6% and 32.4%, respectively. The physicochemical structure of the esterified SCB was characterized with Fourier transform infrared spectra (FT-IR), solid state cross-polarized magic angle spinning 13C nuclear magnetic resonance (CP/MAS 13C-NMR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The direct evidence of the esterification occurrence was provided with FT-IR and solid-state CP/MAS 13C-NMR. The thermal stability of SCB increased upon the mechanocatalytic esterification. The results implied that the relatively homogeneous modification was achieved with this semi-homogeneous esterification method by ball milling. View Full-Text
Keywords: sugarcane bagasse; esterification; ball milling; bio-based materials sugarcane bagasse; esterification; ball milling; bio-based materials

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhang, Q.; Zhang, X.; Zhu, Z.; Zhang, A.; Zhang, C.; Wang, X.; Liu, C. Mechanocatalytic Solvent-Free Esterification of Sugarcane Bagasse. Polymers 2018, 10, 282.

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