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Extraction and characterization of holocellulose fibers by microwave‐assisted selective liquefaction of bamboo
Author(s) -
Xie Jiulong,
Hse ChungYun,
Shupe Todd F.,
Pan Hui,
Hu Tingxing
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43394
Subject(s) - lignin , bamboo , crystallinity , residue (chemistry) , chemistry , nuclear chemistry , liquefaction , fourier transform infrared spectroscopy , absorbance , materials science , chemical engineering , organic chemistry , composite material , chromatography , engineering
Microwave‐assisted selective liquefaction was proposed and used as a novel method for the isolation of holocellulose fibers. The results showed that the bamboo lignin component and extractives were almost completely removed by using a liquefaction process at 120 °C for 9 min, and the residual lignin and extractives in the solid residue were as low as 0.65% and 0.49%, respectively. Increasing the reaction temperature or time could decrease the solid yield, but they can also enhance the removal of lignin and extractives from bamboo particles and increase the holocellulose content in the solid residue. The absorbance bands that characterized functional groups of lignin on the Fourier transform infrared spectra of the solid residue weakened or disappeared. The solid residue showed high crystallinity, indicating the removal of noncellulosic material. Small cracks were observed on the SEM images of the residue, which indicated that the fibers from liquefaction may be susceptible to chemical access or enzyme attack. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43394.