Results 11 to 20 of about 1,867 (190)

Estimation of Acacia melanoxylon unbleached Kraft pulp brightness by NIR spectroscopy

Forest Systems, 2015
Aim of the study: The ability of NIR spectroscopy for predicting the ISO brightness was studied on unbleached Kraft pulps of Acacia melanoxylon R. Br. Area of study: Sites covering littoral north, mid interior north and centre interior of Portugal.
António J. A. Santos, Ofélia Anjos, Helena Pereira   +2 more
doaj   +9 more sources

Hexenuronic acid removal from unbleached kraft eucalyptus pulp by peroxymonosulfuric acid [PDF]

Journal of the Chilean Chemical Society, 2012
The use of peroxymonosulphuric (Ps) acid to remove hexenuronic acid (HexA) present in unbleached eucalyptus kraft pulps was evaluated here. HexA is formed during pulping and is held responsible for reagent consumption during bleaching.
PETIT-BREUILH, XIMENA, ZAROR, CLAUDIO, MELO, ROBERTO   +2 more
core   +3 more sources

Fractionation of Wood Biomass With Thiolactic Acid and Choline Chloride-Based Solvent Into White Lignin for Sustainable Cooling Applications. [PDF]

ChemSusChem
A novel and highly efficient wood biomass fractionation method was developed to produce white lignin, exhibiting the brightest color reported to date. The process yielded white lignin with high yield, excellent visible light reflectance, and elevated infrared emissivity, highlighting its potential as an active material for passive radiative cooling ...
Sirviö JA, Liao M, Arjmandi D, Haverinen J, Wu R, Jonsson MP, Xu C, Ämmälä A, Räty JP.   +8 more
europepmc   +2 more sources

IMPROVEMENT OF PAPER PROPERTIES OF RECYCLED UNBLEACHED SOFTWOOD KRAFT PULPS BY POLY(ALLYLAMINE HYDROCHLORIDE)

BioResources, 2011
Polyelectrolytes containing amine functional groups such as PAH (poly(allylamine hydrochloride)) can be useful, under certain conditions, for improving paper strength.
Paulina Mocchiutti, María V. Galván, María C. Inalbon, Miguel A. Zanuttini   +3 more
doaj   +3 more sources

One-Step Extreme Delignification to Simultaneously Produce High-Purity Cellulose and Phenolated Lignin. [PDF]

ChemSusChem
An extreme delignification strategy using a formic acid–phenol–water system enables the simultaneous production of high‐brightness cellulose fibers and highly reactive phenolic lignin from various biomass sources, providing a sustainable pathway for high‐value utilization of lignocellulosic biomass.
Zhang Y, Wu R, Ni S, Chen X, Wang Z, Li Z, Fu Y, Qin M, Xu C.   +8 more
europepmc   +2 more sources

Electrochemical Characteristics of Lignin in CTMP for Paper Battery Electrodes. [PDF]

ChemSusChem
Lignin naturally present in papers made of unbleached mechanical pulps is electrochemically active. Here, softwood chemi‐thermomechanical pulp (CTMP) is studied as an active cathode material for application in paper batteries. Proof‐of‐concept measurements are shown, and it is found that softwood CTMP fines exhibit competing oxidative electrochemical ...
Isacsson P, Björk E, Capanema E, Granberg H, Engquist I.   +4 more
europepmc   +2 more sources

Preventing Strength Loss of Unbleached Kraft Pulp [PDF]

, 2003
Kraft pulp fibers lose inter-fiber bonding ability when they are dried during the manufacture of paper. Adverse environmental consequences of this loss include (a) limitations on the number of times that kraft fibers can be recycled, (b) reduced paper strength, sometimes making it necessary to use heavier paper or paperboard to meet product strength ...
Hubbe, Martin, Venditti, Richard, Heitmann, John   +2 more
openaire   +2 more sources

Ethanol Production from Hydrolyzed Kraft Pulp by Mono- and Co-Cultures of Yeasts: The Challenge of C6 and C5 Sugars Consumption

Energies, 2020
Second-generation bioethanol production’s main bottleneck is the need for a costly and technically difficult pretreatment due to the recalcitrance of lignocellulosic biomass (LCB).
Rita H. R. Branco, Mariana S. T. Amândio, Luísa S. Serafim, Ana M. R. B. Xavier   +3 more
doaj   +1 more source

Bleached kraft pulp production from Pinus tecunumanii (Eguiluz e Perry) Produção de polpa kraft branqueada de Pinus tecunumanii (Eguiluz e Perry)

Revista Árvore, 2005
The use of 12-year-old Pinus tecunumanii (Eguiluz e Perry) grown in Colombia was evaluated for bleached kraft pulp production. Kraft pulps of kappa number 30 ± 1 were produced, and oxygen delignified and bleached to 90% ISO with ECF processes.
Leonel F. Torres, Roberto Melo, Jorge Luiz Colodette   +2 more
doaj   +1 more source

Microfibrillated lignocellulose (MFLC) and nanopaper films from unbleached kraft softwood pulp [PDF]

Cellulose, 2019
AbstractMicrofibrillated cellulose (MFC) is an important industrial nanocellulose product and material component. New MFC grades can widen the materials property range and improve product tailoring. Microfibrillated lignocellulose (MFLC) is investigated, with the hypothesis that there is an optimum in lignin content of unbleached wood pulp fibre with ...
Erfan Oliaei, Pär A. Lindén, Qiong Wu, Fredrik Berthold, Lars Berglund, Tom Lindström   +5 more
openaire   +1 more source