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Chemistry and Industry of Forest Products ›› 2019, Vol. 39 ›› Issue (2): 109-114.doi: 10.3969/j.issn.0253-2417.2019.02.016

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Preparation of Hydroxypropylated Alkali Lignin and Its Effecton Hydrolysis Efficiency of Cellulase

Cunyi ZHAO1,Wenjun YING2,Zhengjun SHI1,2,Haiyan YANG1,2,Zhifeng ZHENG1,Jing YANG1,2,*()   

  1. 1. Key Laboratory for Forest Resources Conservation and Utilisation in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China
    2. College of Chemical Engineering, Southwest Forestry University, Kunming 650224, China
  • Received:2018-11-02 Online:2019-04-25 Published:2019-05-08
  • Contact: Jing YANG E-mail:kmjingyang@163.com
  • Supported by:


Alkali lignin (AL) was modified by hydroxypropylationto obtain hydroxypropylated lignin (HL), and its effects on enzymatic hydrolysis and non-productive enzyme adsorption were further investigated. The results of Zeta potentials, X-ray photoelectron spectroscopy and hydrophobicity tests indicated that the surface charaoteristics of AL changed after hydroxypropylation. The surface negative charge increased and the surface elements distribution and chemical bonds composition changed greatly. The proportion of C—O and C—C═O bond increased, as well as the hydrophobicity decreased, resulting in the reducing of non-productive adsorption of cellulase onto HL, which significantly increased the enzymatic hydrolysis efficiency. Compared with these of Avicel with AL, the free enzyme protein of Avicel with 4 g/L HL increased by 152 % and the 72 h hydrolysis yield of glucose increased by 32.09%.

Key words: alkali lignin, hydroxypropyl modification, surface properties, enzymatic hydrolysis

CLC Number: