Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 189, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2022.115781
Keywords
Microcrystalline cellulose; Cellulose nanocrystals; Hydrated deep eutectic solvent; High shear force
Categories
Funding
- National Natural Science Foundation of China [32071687, 32001382]
- International Cooperation Joint Laboratory for Production, Education, Research, and Application of Ecological Health Care on Home Furnishing
- Nan Taihu Lake elite plan project ([2018]) [2]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX22_1095]
- Qing Lan Project
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This study proposed and evaluated a method for preparing cellulose nanocrystals (CNC) from microcrystalline cellulose (MCC) by combining chemical hydrated deep eutectic solvent (DES) with mechanical high shear force methods. The method showed increased CNC yields with similar crystal structure as MCC, and is more environmentally friendly and faster compared to conventional methods.
Cellulose nanocrystals (CNC) have been applied in many fields with excellent properties, however, efficient extraction of CNC from biomass materials remains a challenge. This study proposed and evaluated a method for preparing CNC from microcrystalline cellulose (MCC) by combining chemical hydrated deep eutectic solvent (DES) with mechanical high shear force methods. Specifically, when treatment time was increased, the yields of CNC increased from 27.2 % (0.5 h) to 65.2 % (2.5 h). The X-ray diffraction patterns indicate that the obtained CNC possesses the same type of crystal structure as the MCC (cellulose.). Transmission Electron Microscopy analyses determined that CNC has an average diameter of 25.1-33.3 nm and a length ranging from 281.3 nm to 404.2 nm. Moreover, the duration of treatment had no significant effect on the changes in morphology and dimension of CNC. This method is more eco-friendly than conventional hydrolysis, as well as faster than other DES treatments, which paves the way for CNC to be produced from MCC.
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