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Chemistry and Industry of Forest Products ›› 2018, Vol. 38 ›› Issue (1): 25-32.doi: 10.3969/j.issn.0253-2417.2018.01.004

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Quantitative Research on Solubility Property of Straw Wheat Alkali Lignin

NI Haiyue1, REN Shixue1,2, FANG Guizhen1,2, MA Yanli1,2, LIU Xiaole1   

  1. 1. College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China;
    2. Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China
  • Received:2017-09-19 Online:2018-02-25 Published:2018-02-28

Abstract: For quantitative characterizing the solubility properties of wheat straw alkali lignin,the solubility parameters were measured by inverse gas chromatography (IGC) and Hansen solubility parameter (HSP) method.By IGC method,the solubility parameter (δ2) and the related thermodynamic properties of wheat straw alkali lignin were determined in 403.15-443.15 K;wheat straw alkali lignin was used as the stationary phase,and 7 classes of 20 kinds of organic solvents,namely aliphatic,cycloaliphatic,aromatic hydrocarbons,alcohols,ketones,halohydrocarbons and tetrahydrofuran totally 7 classes of 20 kinds of organic solvents were used as the probe molecules;the δ2 was derived as 20.09(J/cm3)0.5 at 298.15 K by linear extrapolation and the δ2 increased with the increase of temperature in 403.15-443.15 K.By HSP method,the solubility parameter (δT) was measured as 20.68(J/cm3)0.5 at 298.15 K.The δ2 and δT values were consistent by IGC and HSP method.And tetrahydrofuran,alcohols and ketones had a good trend of solving straw alkali lignin.

Key words: inverse gas chromatography, Hansen solubility parameter, straw alkali lignin, solubility parameter

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