TY - JOUR
T1 - Physicochemical characterization of hemicelluloses from bamboo (Phyllostachys pubescens Mazel) stem
AU - Peng, Hong
AU - Wang, Na
AU - Hu, Zhengrong
AU - Yu, Ziping
AU - Liu, Yuhuan
AU - Zhang, Jinsheng
AU - Ruan, Roger
PY - 2012/5/1
Y1 - 2012/5/1
N2 - In this paper, hemicelluloses from bamboo (Phyllostachys pubescens Mazel) stem aged six months were sequentially extracted with hot water, 2% KOH, and 5% NaOH. The water-soluble hemicelluloses H 1, and four alkali-soluble hemicellulosic fractions H 2, H 3, H 4 and H 5 were obtained, achieving a total yield of 59.60% based on the original hemicelluloses. Sugar composition analysis showed that the hemicelluloses were mainly composed of xylose (44.39-72.71%), arabinose (26.36-51.87%), ribose (0.93-2.72%), and uronic acid (0.29-5.27%). The structures of the hemicelluloses were determined to be mainly arabinoxylan, using the FT-IR and NMR techniques. The AFM images of fraction H 3 revealed a distribution of spherical nanoparticles with different sizes, while the fraction H 2 had helix rod and random coil feature. The SEM characterizations indicated that the fraction H 1 displayed spherical particles while the fraction H 3 had mainly flat particles at high magnification. Thermal stability was also analyzed using TG-DTG method and first-order kinetics model.
AB - In this paper, hemicelluloses from bamboo (Phyllostachys pubescens Mazel) stem aged six months were sequentially extracted with hot water, 2% KOH, and 5% NaOH. The water-soluble hemicelluloses H 1, and four alkali-soluble hemicellulosic fractions H 2, H 3, H 4 and H 5 were obtained, achieving a total yield of 59.60% based on the original hemicelluloses. Sugar composition analysis showed that the hemicelluloses were mainly composed of xylose (44.39-72.71%), arabinose (26.36-51.87%), ribose (0.93-2.72%), and uronic acid (0.29-5.27%). The structures of the hemicelluloses were determined to be mainly arabinoxylan, using the FT-IR and NMR techniques. The AFM images of fraction H 3 revealed a distribution of spherical nanoparticles with different sizes, while the fraction H 2 had helix rod and random coil feature. The SEM characterizations indicated that the fraction H 1 displayed spherical particles while the fraction H 3 had mainly flat particles at high magnification. Thermal stability was also analyzed using TG-DTG method and first-order kinetics model.
KW - Bamboo stem
KW - Hemicelluloses
KW - Morphological properties
KW - Structure
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U2 - 10.1016/j.indcrop.2011.11.031
DO - 10.1016/j.indcrop.2011.11.031
M3 - Article
AN - SCOPUS:84863143879
VL - 37
SP - 41
EP - 50
JO - Industrial Crops and Products
JF - Industrial Crops and Products
SN - 0926-6690
IS - 1
ER -