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Aspects on bleaching and tempo-mediated oxidation of wheat straw pulp fractions

Heijnesson-Hultén, Anette and Jiri, Basta and Samuelsson, Marie and Greschik, Thomas and Ander, Paul and Daniel, Geoffrey (2012). Aspects on bleaching and tempo-mediated oxidation of wheat straw pulp fractions. Bioresources. 7:3, 3051-3063
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Official URL: http://www.ncsu.edu/bioresources/BioRes_07/BioRes_...

Abstract

This study outlines research concerning wheat straw fines, including their impact on pulp bleachability, their modification by chemical means, and their use as a dry strength enhancer in a paper application. Results show that primary fines constituting about 23% of the whole wheat straw pulp had a large negative impact on pulp bleachability. The differences in response to bleaching were due to the different properties of the fines, i.e. higher kappa number, higher metal ion content, lower brightness, and lower viscosity compared to that of fibers. It was also shown that the fines fraction is more difficult to oxidize and does not reach as high fiber charge levels as that of the other fractions. However, at a dosage of >= 3 mmol hypochlorite/g it was possible to prepare nanofibers from wheat straw fines that showed a good strength-enhancing effect in a paper product. The fact that removal of fines from wheat straw pulps by fractionation improves bleachability and also drainage properties at the same time, while simultaneously the fines can be modified and used as a strength enhancer, is very interesting when evaluating the potential of this type of annual plant as a source for production of different paper products.

Authors/Creators:Heijnesson-Hultén, Anette and Jiri, Basta and Samuelsson, Marie and Greschik, Thomas and Ander, Paul and Daniel, Geoffrey
Title:Aspects on bleaching and tempo-mediated oxidation of wheat straw pulp fractions
Series/Journal:Bioresources (1930-2126)
Year of publishing :2012
Volume:7
Number:3
Page range:3051-3063
Number of Pages:13
Publisher:Department of Wood and Paper Science, College of Natural Resources, north Carolina State University
ISSN:1930-2126
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:K Forestry > K50 Processing of forest products
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:Wheat straw, Fines, Non-wood fiber, Bleaching, TEMPO, Oxidation, Fiber properties, Strength properties, HCl method, Electron microscopy, SEM, TEM
URN:NBN:urn:nbn:se:slu:epsilon-e-1512
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1512
Additional ID:
Type of IDID
Web of Science (WoS)000307639900027
ID Code:10529
Department:(S) > Dept. of Forest Products
Deposited By: SLUpub Connector
Deposited On:19 Jun 2013 10:41
Metadata Last Modified:15 Dec 2014 11:28

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