Impact of Dimethyl Sulfoxide Treatment on Morphology and Characteristics of Nanofibrillated Cellulose Isolated from Corn Husks

Xue Yang, Xiaoting Wang, Hui Liu, Yanjiao Zhao, Shuai Jiang, Lifang Liu

Abstract


This work investigated the impact of dimethyl sulfoxide (DMSO) treatment in the isolation of nanofibrillated cellulose (NFC) from corn husk by the 2,2,6,6,-tetramethylpilperidine-1-oxyl (TEMPO) oxidation method. NFC-A and NFC-B were prepared without and with DMSO treatment before TEMPO oxidation. The extracted NFC were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), zeta potential analyzer, X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The results showed that the dimension of both NFC-A and NFC-B were in nanoscale. The crystalline type of NFC was cellulose I, and the crystallinity of NFC was obviously increased. The thermal stability of NFC was reduced slightly. Compared with NFC-A, NFC-B had a narrower distribution range, higher crystallinity, and better thermal stability. This result demonstrated that DMSO treatment did not change the chemical structure of NFC, but it affected their dimension and distribution and improved their dispersion stability, crystallinity, and thermal stability.

Keywords


Corn husk; Nanofibrillated Cellulose; TEMPO-oxidation; Dimethyl sulfoxide (DMSO)

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