Effect of electrohydrodynamic technique as a complementary process for cellulose extraction from bagasse: Crystalline to amorphous transition

Safoura Ahmadzadeh; Ali Nasirpour; Maryam Beygy Harchegani; Nasser Hamdami; Javad Keramat

doi:10.1016/j.carbpol.2018.01.109

Effect of electrohydrodynamic technique as a complementary process for cellulose extraction from bagasse: Crystalline to amorphous transition

Carbohydr Polym. 2018 May 15:188:188-196. doi: 10.1016/j.carbpol.2018.01.109. Epub 2018 Feb 2.

Authors

Safoura Ahmadzadeh¹, Ali Nasirpour², Maryam Beygy Harchegani³, Nasser Hamdami⁴, Javad Keramat⁵

Affiliations

¹ Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran. Electronic address: s.ahmadzadeh@ag.iut.ac.ir.
² Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran. Electronic address: ali.nasirpour@cc.iut.ac.ir.
³ Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran. Electronic address: m.beygy@ag.iut.ac.ir.
⁴ Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran. Electronic address: hamdami@cc.iut.ac.ir.
⁵ Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran. Electronic address: keramat@cc.iut.ac.ir.

PMID: 29525156
DOI: 10.1016/j.carbpol.2018.01.109

Abstract

Electrohydrodynamic technique (EHD) has lately received considerable attention as an important non-thermal method used for food processing. In this work the effect of EHD on physicochemical properties of cellulose extracted from bagasse was investigated. A three-step process was chosen to extract cellulose fibers, which was performed under a high voltage electric field at the beginning of each step. The cellulose fibers were then characterized using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Thermogravimetric Analysis (TGA). The morphological evaluation revealed that the cellulose fibers have smaller diameter and larger length compared to the microcrystalline cellulose. Moreover, according to the XRD patterns and FTIR spectrum, EHD-treated fibers mainly showed an amorphous structure, and contained a low crystalline fraction. The amorphous structure of cellulose fibers was confirmed by TGA analysis which revealed the presence of higher proportion of amorphous cellulose fraction causes early onset of thermal decomposition.

Keywords: Amorphous structure; Cellulose; Electrohydrodynamic technique; Sugarcane bagasse.