Hydrothermal and mechanically generated hemp hurd nanofibers for sustainable barrier coatings/films

Preeti Tyagi, Joseph N. Gutierrez, Ved Nathani, Lucian A. Lucia, Orlando J. Rojas, Martin A. Hubbe, Lokendra Pal*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Residual hemp (Cannabis sativa) hurd fibers obtained from hydrothermal, carbonate, and kraft treatments were the resources used to obtain lignocellulosic nanofibers (LCNF) by using an ultra-fine friction grinder. The morphological, crystallinity, and chemical characteristics of the nanocellulose films were carried out using SEM, XRD, EDX and ToF-SIMS. Water barrier properties of the same were measured in terms of water contact angle, water vapor permeability (WVP) and water absorption. The barrier properties were found to be dependent not only on the lignin content and lignin distribution, but also on the film density and porous structure. LCNF films and coatings showed much higher water contact angle (WCA) (80°-102°) than films produced from the bleached CNF. WVP was found to be more dependent on the density of films than lignin content. Overall, LCNF-based films and coatings derived from hemp hurd residual fibers can contribute to a circular economy and sustainability.

Original languageEnglish
Article number113582
Number of pages10
JournalIndustrial Crops and Products
Volume168
Early online date7 May 2021
DOIs
Publication statusE-pub ahead of print - 7 May 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Barrier coatings
  • Biodegradable films
  • Circular economy
  • Hemp hurds
  • Lignin-containing cellulose nanofibers
  • Sustainability

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