Results 21 to 30 of about 9,977 (226)

Comparison of Soda, Kraft, and DES Pulp Properties of European Black Poplar

open access: yesDrvna Industrija, 2022
Kraft pulping as the dominant pulping method contributes to several environmental problems. To overcome these problems, environmentally friendly pulping methods have been investigated. In the last years, deep eutectic solvents (DESs) have been identified
Sezgin Koray Gülsoy   +2 more
doaj   +1 more source

Tailor-made alkaliphilic and thermostable fungal laccases for industrial wood processing

open access: yesBiotechnology for Biofuels and Bioproducts, 2022
Background During the kraft process to obtain cellulosic pulp from wood, most of the lignin is removed by high-temperature alkaline cooking, released in the black liquors and usually incinerated for energy. However, kraft lignins are a valuable source of
David Rodríguez-Escribano   +11 more
doaj   +1 more source

Physical properties of kraft pulp oxidized by hydrogen peroxide under mildly acidic conditions [PDF]

open access: yes, 2022
The objective of this study is to gain further insight into the compositional and physical changes of kraft pulp caused by oxidation with hydrogen peroxide under acidic conditions. A softwood kraft pulp has been subjected to varying degrees of oxidation.
Theliander, Hans   +5 more
core   +1 more source

Boron Compounds-Added Kraft Pulping from Scots Pine

open access: yesDrvna Industrija, 2023
In this study, effects of KBH4 (PB), NaBH4 (SB), Etibor-48 (E48), Etidot-67 (E67), and colemanite (Col) on kraft pulp and paper properties of Scots pine (Pinus sylvestris L.) wood were evaluated.
Süleyman Kuştaş, Sezgin Koray Gülsoy
doaj   +1 more source

Relationship between wettability of pulp fibers and tensile strength of paper during recycling

open access: yesScientific Reports, 2022
The wettability of the paper surface is greatly affected by the wettability of the pulp fibers. We conducted this study in order to understand the relationship between the wettability of a single fiber of recycled pulp and the strength of recycled paper,
Hailan Jin   +3 more
doaj   +1 more source

Modification of kraft wood-pulp fibre with silica for surface functionalisation [PDF]

open access: yes, 2008
A new science strategy for natural fibre modification was devised in which glass surface properties would be imparted to wood-derived fibre. The enhancements known from addition of silane reagents to glass fibre–polymer composites could therefore be ...
Nicholson, Brian K.   +11 more
core   +1 more source

Successive twin-wire roll forming of two-ply paper with softwood kraft pulp and recycled pulp û€“ effect of kraft-ply formation on Z-strength - OPEN ACCESS [PDF]

open access: yes, 2017
Kraftliner and kraft-top liner typically consists of two or more plies that are formed separately and combined by couching. The Z-strength tends to be limited by the ply adhesion, and the softwood kraft pulp used is commonly refined beyond the optimum ...
Nordström, Bengt,   +3 more
core   +1 more source

Efeito do conteúdo e da natureza da lignina residual na eficiência e na seletividade do branqueamento com ozônio Effect of residual lignin content and nature on the efficiency and selectivity of ozone bleaching

open access: yesRevista Árvore, 2003
Neste estudo foram avaliados os efeitos do conteúdo e da natureza da lignina residual na eficiência e na seletividade do branqueamento com ozônio de polpa kraft convencional (kraft) e pré-deslignificada com oxigênio (kraft-O).
Elenice Pereira Maia   +1 more
doaj   +1 more source

Process modifications to obtain a prehydrolysis kraft dissolving pulp with low limiting pulp viscosity [PDF]

open access: yes, 2020
Cellulose can be directly dissolved in cold alkali without derivatization. However, this requires low cellulose molecular weight, i. e. low pulp viscosity, preferably below 300 mL g−1.
Walter, Karin,, Brännvall, Elisabet,
core   +1 more source

Hardwood kraft pulp fibre oxidation using acidic hydrogen peroxide [PDF]

open access: yes, 2021
Gaining insight into the oxidation of hardwood kraft fibres using hydrogen peroxide at mildly acidic conditions was the main aim of this study. The oxidized hardwood pulp had an increased number of carbonyl groups and, when formed into sheets, an ...
Theliander, Hans   +5 more
core   +1 more source

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