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Cellulose

pp 1–14 | Cite as

Effect of lignin content on the microstructural characteristics of lignocellulose nanofibrils

  • Haocheng Fu
  • Wenhua GaoEmail author
  • Bin WangEmail author
  • Jinsong Zeng
  • Zheng Cheng
  • Jun Xu
  • Kefu Chen
Original Research
  • 39 Downloads

Abstract

The microstructure and properties of lignocellulosic fibers usually change during the drying process due to the hornification of fibers. The water retention ability of fibers is an effective way to reflect the degree of fiber hornification. In this study, the effects of lignin content on the microstructural properties of dried-redispersed LCNFs (DLCNFs) were extensively explored. The results showed that the high content of lignin could maintain the microstructural integrity of DLCNFs. The water retention value and hornification degree of high lignin content DLCNFs (22.1%, w/w) were 289.8% and 6.9%, which were much lower than those of low lignin content (6.2%, w/w) DLCNFs. This was probably because that the crosslinking between lignin and carbohydrate effectively prevented the hydrogen bonding formation in the interior-fibers and exterior-fibers, and reduced the irreversible hornicficatoin of LCNFs. This study will be beneficial for the development of the LCNF drying mechanism.

Graphic abstract

Keywords

Lignocellulose nanofibrils Microstructure Water retention Hornification degree 

Notes

Acknowledgments

The work was supported by the National Natural Science Foundation of China (31971603, 31600471), Funda-mental Research Funds for the Central Universities (2019MS084, 2019MS085), Guangdong Province Science Foundation for Cultivating National Engineering Research Center for Efficient Utilization of Plant Fibers (2017B090903003), National Key R&D Program of China (Number: 2017YFB0307902), and Guangdong provincial science & technology plan projects (2015B020241001). We are grateful to Zhihui Lei, Long Li, Luyao Huang, Yanbo Huang for their laboratory assistance.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhouPeople’s Republic of China

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