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Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (5): 21-26.doi: 10.3969/j.issn.1673-5854.2019.05.004

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Comparison of Preparation and Properties of Polysaccharide Gums from Gleditsia sinensis Lam. and Gymnocladus dioicus(L.) K. Koch

Siyi JU1,Changyou GUO2,Miaoxin ZHU1,Yantao LIU1,Jianxin JIANG1,*()   

  1. 1. College of Material Science and Technology, Beijing Forestry University, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing 100083, China
    2. College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • Received:2018-09-19 Online:2019-09-30 Published:2019-09-27
  • Contact: Jianxin JIANG E-mail:jiangjx@bjfu.edu.cn
  • Supported by:
    国家重点研发计划资助项目(2016YFD0600803)

Abstract:

The Gleditsia sinensis Lam. and Gymnocladus dioicus(L.) K. Koch were used as raw materials for 4, 6, and 8 min photo-wave baking pretreatment and mechanical separation, and then polysaccharide gums were prepared by micro water solid phase method and purified. The effects of different photo-wave baking pretreatment time on the apparent viscosities and compositions of the polysaccharide gums with two raw materials were compared. The results showed that the apparent viscosities of the two polysaccharides pretreated for 6 min were the highest, which were 461.90 and 703.85 mPa·s under the shear rate of 5.1 s-1, respectively. The longer the baking time was, the higher the protein content in the G. sinensis gum was, while the protein content in the G. dioicus gums barely changed. The water insoluble contents of G. sinensis gum were generally higher than those of G. dioicus gum.The lowest water insoluble contents of G. sinensis gums and G. dioicus gums were 32.30% and 32.50% after pretreatment by baking for 8 and 6 min, respectively. The galactomannan content(79%-83%) of purified polysaccharide gums significantly was higher than the pristine polysaccharide gums, and the M/G value(about 3.0) of purified polysaccharide gum was significantly lower than that of the pristine polysaccharide gums.

Key words: Gleditsia sinensis Lam., Gymnocladus dioicus(L.) K. Koch, polysaccharide gums, galactomannan, apparent viscosity

CLC Number: