Environmentally friendly lignocellulose nanofibres from barley straw

Montserrat Juárez, Rafael Sánchez*, Eduardo Espinosa, Juan Domínguez-Robles, Isabel Bascón-Villegas, Alejandro Rodríguez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Due to the environmental awareness in our society, this paper explores the possibility of obtaining high value-added products from agricultural wastes, such as cereal straw. The raw material chosen for this study was barley straw, which was pulped by a Specel® pulping process. This process uses soda (7% on oven dried material) as reagent. The chemical composition of both barley straw and unbleached pulp was determined through different parameters (alcohol extractives, α-cellulose, hemicelluloses, lignin and ash). Lignocellulose nanofibres (LCNF) were obtained by subjecting the pulp to mechanical pretreatment, followed by a high-pressure homogenizer step. The produced LCNF were characterized with regard to the nanofibrillation yield, viscosity, cationic demand and carboxyl content. The LCNF were added to a papermaking slurry based on virgin eucalyptus (bleached Kraft hardwood pulp), in amounts of 1, 3 and 5% as reinforcement. Paper sheets were made and characterized with regard to their mechanical properties. The results indicated that paper strength was improved after the addition of LCNF.

Original languageEnglish
Pages (from-to)589-595
Number of pages7
JournalCellulose Chemistry and Technology
Volume52
Issue number7-8
Publication statusPublished - Jul 2018
Externally publishedYes

Keywords

  • Barley straw
  • Cellulose pulp
  • Lignocellulose nanofibres
  • Paper strength
  • Papermaking
  • PFI-beating

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry

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