Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 92, Issue -, Pages 1025-1033Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2016.08.019
Keywords
Lignocellulose nanofiber; Organosolv; Kraft; Soda; Wheat straw; Characterization
Funding
- Spain's DGICyT, MICINN [CTQ2013-46804-C2-2-R]
- Spanish Ministry of Science and Education through the National Program FPU [FPU14/02278]
Ask authors/readers for more resources
Wheat straw was cooked under different pulping processes: Soda (100 degrees C, 7% NaOH, 150 min), Kraft (170 degrees C, 16% alkalinity, 25% sulfidity, 40 min) and Organosolv (210 degrees C, 60% ethanol, 60 min). Once the pulps were obtained, lignocellulose nanofibers (LCNF) were isolated by mechanical process and TEMPO mediated oxidation followed by a high pressure homogenization. After pulping process, the different pulps were characterized and its chemical composition was determined. The pulps characterization indicates that the Soda process is the process that, despite producing less delignification, retains much of the hemicelluloses in the pulp, being this content a key factor in the nanofibrillation process. Regarding the LCNF obtained by mechanical process, those nanofibers isolated from Organosolv wheat pulp (OWP) and Kraft wheat pulp (KWP) show low values for nanofibrillation yield, specific surface area and greater diameter. However, those nanofibers isolated from Soda wheat pulp (SWP) reach much higher values for these parameters and presents a diameter of 14nm, smaller than those obtained by TEMPO -mediated oxidation from OWP. Smaller diameters are generally obtained in TEMPO -oxidized LCNF. This work concludes that the lignin content does not affect greatly to obtain LCNF as does the hemicellulose content, so it is accurate to use a soft pulping process. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available