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Cellulose

, Volume 25, Issue 12, pp 7043–7051 | Cite as

A novel method to prepare lignocellulose nanofibrils directly from bamboo chips

  • Hailong Lu
  • Lili Zhang
  • Cuicui Liu
  • Zhibin He
  • Xiaofan Zhou
  • Yonghao Ni
Original Paper
  • 171 Downloads

Abstract

Nanocelluloses, including cellulose nanocrystals (CNCs), bacterial nanocellulose (BNC), and cellulose nanofibrils (CNFs), have attracted much attention in recent years all over the world. However, commercial applications of nanocelluloses are still limited due to the high cost of nanocelluloses. In this study, we developed a novel method to prepare lignocellulose nanofibrils (LCNF) directly from bamboo chips (BC), which can readily be scaled up. The method developed consists of three primary steps, which are as follows: glycerol pretreatment, screw extrusion, and mechanical refining/milling in a colloid mill. Glycerol can readily penetrate into bamboo chips and it is used as an effective reaction medium for fibrillation and delignification. The LCNF yield is about 77.2% based on bone dry bamboo chips. The morphology of the LCNF was investigated by transmission electron microscopy (TEM), which shows that the LCNFs have a diameter of 20–80 nm and a length of several thousand nanometers. X-ray diffraction (XRD) analysis shows that the crystallinity of the LCNF was 52.7%, which was slightly lower than that of the bamboo raw material. This process can be easily scaled up for commercial production of LCNF.

Keywords

Bamboo chips Glycerol pretreatment Screw extrusion pretreatment Mechanical refining Sulfuric acid catalyst Lignocellulose nanofibrils 

Notes

Acknowledgments

The authors acknowledge the financial support from the Natural Science Foundation of Jiangsu Provincial University (16KJA220005), the Postgraduate Research and Practice Innovation Program of Jiangsu Province (KYCX17-0835), the Doctorate Fellowship Foundation of Nanjing Forestry University, and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions.

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry and FoodNanjing Forestry UniversityNanjingChina
  2. 2.Department of Chemical EngineeringUniversity of New BrunswickFrederictonCanada

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