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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Filament spinning of unbleached birch kraft pulps: Effect of pulping intensity on the processability and the fiber properties  [2018]

Ma, Yibo; Stubb, Jonas; Kontro, Inkeri; Nieminen, Kaarlo; et al.

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Man-made lignocellulosic fibres were successfully prepared from unbleached birch kraft pulps by using the Ioncell-F technology. Pulps with different lignin content were produced by tailored kraft pulping with varying intensity. The degree of polymerization of the pulps was adjusted by acid-catalyzed hydrolysis and electron beam treatment. All substrates were completely soluble in 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) and the respective solutions were spinnable to yield fibres with good to excellent mechanical properties despite the use of only mildly refined wood pulp. The tensile properties decreased gradually as the lignin concentration in the fibres increased. Changes in the chemical composition also affected the structure and morphology of the fibres. Both the molecular orientation and the crystallinity decreased while the presence of lignin enhanced the water accessibility. The effects of the crystallite size and lignin content on monolayer water adsorption are discussed.
From the journal
Carbohydrate polymers
ISSN : 0144-8617

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2018
Volume:
179
Issue:
10
Extent:
145-151
Publisher:
Elsevier Ltd
All titles:
"Filament spinning of unbleached birch kraft pulps: Effect of pulping intensity on the processability and the fiber properties"@eng
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2018
Volume:
179
Issue:
10
Extent:
145-151
Publisher:
Elsevier Ltd
All titles:
"Filament spinning of unbleached birch kraft pulps: Effect of pulping intensity on the processability and the fiber properties"@eng