Clean Manufacturing of Cellulose Nanopapers by Incorporating Lignin and Xylan as Sustainable Additives

Sergejs Beluns, Sergejs Gaidukovs*, Oskars Platnieks, Anda Barkane, Gerda Gaidukova, Liga Grase, Martins Nabels-Sneiders, Andrejs Kovalovs, Vijay Kumar Thakur

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
4 Downloads (Pure)

Abstract

In this work, we report for the first time the clean manufacturing of cellulose nanopapers by a green path of mixing nanocellulose suspension in water with lignin and xylan. The procedure involves grinding the old wastepaper, microfluidizing, casting, and water evaporation. The introduction of lignin and xylan with various loadings from 1 to 30 wt% showed that properties could be significantly tuned. Moreover, lignin and xylan loadings introduced into these nanopapers endow them with improved mechanical and structural properties, as evidenced by tensile tests and scanning electron microscopy analysis (SEM). Xylan strongly promotes the transparency of nanopapers. Even at low loadings, the addition of xylan and lignin enhanced specific strength by 1.3-fold, while specific elastic modulus was found to exhibit a a 2-fold enhancement. Mathematical modeling complemented the analysis of tensile properties. Thermogravimetric analysis testified that the wastepaper is made of highly purified cellulose. Furthermore, thermal properties analysis shows that the modified nanopapers have higher thermal conductivity and diffusivity than the unmodified ones. Thermal conductivity was found to improve 3.5-fold for compositions with 30 wt% loading of modifiers corresponding to the developed denser structure as revealed by SEM. The introduced crosscut and surface structure changes enable functional applications to obtain packaging, filtering, biomedical, and sensor materials.
Original languageEnglish
Article number100207
Pages (from-to)1-9
Number of pages9
JournalCarbohydrate Polymer Technologies and Applications
Volume3
Early online date17 Apr 2022
DOIs
Publication statusPrint publication - Jun 2022

Keywords

  • cellulose
  • nanopapers
  • lignin
  • xylan
  • clean manufacturing
  • Mechanical properties
  • Food packaging
  • Forestry residue
  • Green modification
  • Nanofibrillated cellulose

Fingerprint

Dive into the research topics of 'Clean Manufacturing of Cellulose Nanopapers by Incorporating Lignin and Xylan as Sustainable Additives'. Together they form a unique fingerprint.

Cite this