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Wood Research and Technology


Cellulose – Hemicelluloses – Lignin – Wood Extractives

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Effect of enzymatic hydrolysis lignin on the mechanical strength and hydrophobic properties of molded fiber materials

Yinling Zhao / Shengling Xiao / Jinquan Yue
  • College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Dingyuan Zheng
  • College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Liping Cai
  • Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA
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  • De Gruyter OnlineGoogle Scholar
Published Online: 2019-12-05 | DOI: https://doi.org/10.1515/hf-2018-0295


In this study, poplar chemi-mechanical pulp was used as a raw material to investigate the effect of enzymatic hydrolysis lignin (EHL) content on the tensile strength and hydrophobicity of molded fiber materials (MFMs). The tensile strength and hydrophobic properties of the fabricated MFMs with different EHL contents were evaluated, and changes in their microstructure, chemical structure, and thermal stability were characterized via scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric (TG) analysis, respectively. Results show that under the experimental conditions used herein, the addition of EHL could increase the tensile strength and surface water contact angle of MFMs up to 20.3 MPa and 95.0°, respectively. The SEM observations indicate that the addition of EHL expanded the contact area between the EHL and fibers, thereby reducing the holes between fibers. The FTIR and TG analyses indicated that hot-pressing degraded EHL to form small molecular substances and improved the reaction with aldehydes produced via carbohydrate degradation, improving both the inter-fiber bonding strength and hydrophobicity of the MFM surface.

Keywords: enzymatic hydrolysis lignin; hydrophobic property; molded fiber material; tensile strength


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About the article

Received: 2018-12-13

Accepted: 2019-09-04

Published Online: 2019-12-05

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

Research funding: This work was supported by the Fundamental Research Funds for Central Universities (no. 2572018AB24) and the National Key Research and Development Program of China (no. 2017YFD0601004).

Employment or leadership: None declared.

Honorarium: None declared.

Citation Information: Holzforschung, 20180295, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/hf-2018-0295.

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