Results 191 to 200 of about 23,645 (231)

Composites of kraft lignin

2012
Many materials, man-made and natural, have a composite structure, i.e. they comprise two or more constituent materials with distinct differences. Concrete is a common example. It consists of sand or gravel, cement and water. Wood is also a composite. It has strong, crystalline cellulose structures glued together by hemicelluloses and lignin. The unique
Kouisni, Lamfeddal, Paleologou, Michael, Wikström, Lisa, Browne, Tom, von Weymarn, Niklas, Nättinen, Kalle   +6 more
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Simulation of Kraft Lignin Pyrolysis

1985
The profitable conversion of lignin to low-molecular-weight products is hindered by the complexity of both its chemical structure and also its conversion product spectra. These complexities not only mask the actual fundamental events occurring during lignin processing but render design, scale-up and optimization difficult.
Francis P. Petrocelli, Michael T. Klein
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Kraft Lignins: A New Perspective

1986
Among the naturally occurring polymers, lignins are second only to cellulose in abundance, and in terms of energy content they might actually be the most abundant. They are found as cell-wall components in all dryland arborescent and herbaceous plants. Native lignins are generally conceived as being cross-linked macromolecules of “infinite” extent that
Theodore M. Garver, Simo Sarkanen
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Kraft lignin in polyurethanes. II. Effects of the molecular weight of kraft lignin on the properties of polyurethanes from a kraft lignin–polyether triol–polymeric MDI system

Journal of Applied Polymer Science, 1990
AbstractPolyurethane films were prepared by solution casting using a three‐component system consisting of polymeric MDI, a propylene oxide‐based polyether triol and kraft lignin fractions of different molecular weights. The polyether triol was used as soft segment.
Hirohisa Yoshida, Roland Mörck, Knut P. Kringstad, Hyoe Hatakeyama   +3 more
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Influence of Ozonized Kraft Lignin on the Crystallization of CaCO3

Journal of Colloid and Interface Science, 2002
Results are reviewed from a study examining how structural modifications introduced by ozonization enhance the influence of kraft lignin on the crystallization of CaCO(3). Ozone treatment of kraft lignin in an aqueous environment is shown to increase its carboxylic acid and overall oxygen content and reduce its molecular weight.
Steven J, Severtson, Jihui, Guo
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Color reduction of sulfonated eucalyptus kraft lignin

International Journal of Biological Macromolecules, 2017
Several eucalyptus lignins named as HSL, SML and BSL were prepared by high temperature sulfonation, sulfomethylation, butane sultone sulfonation respectively. The color properties of samples were investigated. Under optimized conditions the sulfonic group (SO3H) content of HSL, SML and BSL reached 1.52, 1.60 and 1.58mmol/g, respectively.
Hui, Zhang, Youcan, Bai, Wanpeng, Zhou, Fangeng, Chen   +3 more
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The colloidal behaviour of kraft lignin III. Swelling behaviour and mechanical properties of kraft lignin gels

Colloid and Polymer Science, 1980
Kraft lignin gels have been synthesized by cross-linking kraft lignin (Indulin ATR) in water with varying amounts of epichlorohydrin under alkaline conditions. The effects of pH and salt concentration on the swelling behaviour and on the mechanical properties of these gels have been investigated.
T. Lindström, L. Westman
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Ozonization of kraft lignin

Nordic Pulp & Paper Research Journal, 1988
Per Månsson, Rofand Öser
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Lignins - Determination of lignin content in kraft lignin, soda lignin, and hydrolysis lignin

2022
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Chromophores in Kraft Lignin

1966
S. INGEMAR FALKEHAG, JOSEPH MARTON, ERICH ADLER   +2 more
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