Transparent Nanopaper from Nanofibrillated Bamboo Pulp

Authors

  • Xuran Liu College of Materials Engineering, North China Institute of Aerospace Engineering, Hebei, Langfang, 065000, People’s Republic of China
  • Xilong Dong Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190
  • Hongkun Wang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190
  • Min Wu Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190
  • Yong Huang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190

Keywords:

Bamboo, Cellulose nanofiber, Hydrophobic, Nanopaper

Abstract

Bamboo pulp was used to produce modified cellulose nanofiber (M-CNF) with 3,4-dichlorophenyl isocyanate through a one-step mechano-chemical method by ball milling. The structural variations of bamboo cellulose with different degrees of substitution (DS) for hydroxyl groups were studied by FTIR, XRD, TEM, AFM, and elemental analysis. The DS was as high as 0.88 after just 2 h of ball milling, and the diameter of M-CNF was 2 to 3 nm after just 1 h of ball milling. The modified nanocellulose was hydrophobic, with a water contact angle as high as 87°. The nanopaper made from the nanocellulose by vacuum filtration was transparent, with an optical transparence up to 88.8% at 550 nm. However, the transmittance of the modified nanopaper decreased to nearly 0 over the wavelength range of 200 to 300 nm. This nanopaper can be used as flexible optoelectronic material, packing material, or ultraviolet shielding material.  

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Published

2023-04-21 — Updated on 2023-05-26

Issue

Vol. 18 No. 2 (2023)

Section

Research Article or Brief Communication