Food and Fermentation Industries >

2022 , Vol. 48 >Issue 13: 148 - 154

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.029129

Synergistic preparation of nanocellulose by ionic liquid pretreatment/sulfuric acid hydrolysis and application in Pickering emulsion

  • ZHANG Shumin ,
  • LIU Yue ,
  • LIU Honglong ,
  • ZHANG Yuhao ,
  • CHEN Yuan ,
  • YU Yong ,
  • DAI Hongjie
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  • 1(College of Food Science, Southwest University, Chongqing 400715, China)
    2(National Demonstration Center for Experimental FoodScience and Technology Education (Southwest University), Chongqing 400715, China)

Received date: 2021-08-23

  Revised date: 2021-09-11

  Online published: 2022-08-03

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Abstract

The nanocellulose was prepared by ionic liquid pretreatment/H2SO4 hydrolysis synergistic method using microcrystalline cellulose (MCC) as a raw material. The influence of H2SO4 concentrations (10%-40%, on mass basis) on the structure of nanocellulose was studied through analysis of Zeta potential, atomic force microscopy (AFM), Fourier transform infrared spectroscopy, X-ray diffraction (XRD) and thermal gravimetric analysis. The preliminary application of nanocellulose in Pickering emulsion was also evaluated. The results showed after ionic liquid pretreatment, the yield of nanocellulose gradually decreased, but the absolute value of Zeta potential of nanocellulose increased as H2SO4 concentration increased from 10% to 40%. AFM results showed that the morphology of nanocellulose changed from long-filament network structure to short rod-like structure, which showing a decrease of length but an increase of diameter. XRD results showed that all the nanocelluloses had both cellulose type I and type II crystal structures with a reduction of crystallinity. The hydrogen bonds structure of MCC was destroyed during ionic liquid pretreatment, and the thermal stability gradually decreased with the increase of H2SO4 concentration. All the nanocelluloses can stabilize Pickering emulsion at different particle concentration (1-5 g/L) and oil ratio (30%-70%, on volume basis), but the nanocellulose prepared at 40% sulfuric acid concentration showed a better stable emulsion performance.

Key words： ionic liquid; sulfuric acid; nanocellulose; structure; Pickering emulsion

Cite this article

ZHANG Shumin , LIU Yue , LIU Honglong , ZHANG Yuhao , CHEN Yuan , YU Yong , DAI Hongjie . Synergistic preparation of nanocellulose by ionic liquid pretreatment/sulfuric acid hydrolysis and application in Pickering emulsion[J]. Food and Fermentation Industries, 2022 , 48(13) : 148 -154 . DOI: 10.13995/j.cnki.11-1802/ts.029129

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