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Chemistry and Industry of Forest Products ›› 2017, Vol. 37 ›› Issue (2): 65-71.doi: 10.3969/j.issn.0253-2417.2017.02.008

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Monosaccharide Compositions of Yunnan Bitter Cherry Tree Gum and Synthesis and Properties of Graft Copolymer

WANG Dawei1, ZHAO Ning1, JI Mei2, FENG Xiaofei1, HU Lianrong2   

  1. 1. Faculty of Life Science, Southwest Forestry University, Kunming 650224, China;
    2. Yunnan Academy of Forestry, Kunming 650201, China
  • Received:2016-07-22 Online:2017-04-25 Published:2017-05-04

Abstract: The high-performance anion exchange chromatography (HPAEC) system was used to determine the monosaccharide compositions of Yunnan bitter cherry tree gum. Then, the hetero polysaccharide of tree gum was used as raw material to graft copolymerize with acrylamide and then the tree gum-acrylamide graft copolymer product (TG-AM) was prepared. The TG-AM was characterized by FT-IR and scanning electron microscope (SEM) analysis, and the adsorption properties of Cu2+ on TG-AM were investigated. The results indicated that the most abundant monosaccharide compositions of the tree gum hetero polysaccharide were D-galactose and L-arabinose, and the relative percents were 41.56% and 38.72%, respectively. The FT-IR analysis revealed that acrylamide had successfully grafted onto hetero polysaccharide molecules. The SEM images showed that the surface and inside of the graft copolymer had a lot of independent or conjoint micropores with the pores diameter of 2-10 μm. The adsorption of Cu2+ on TG-AM was affected by the solution pH with the optimal pH of 6-7, and agreed with the Langmuir isothermal model with the maximum theoretical adsorption quantity (Qm) of 27.93 mg/g at 20 ℃.

Key words: tree gum, hetero polysaccharide, acrylamide, graft copolymerization, adsorption

CLC Number: