Document Detail

Irradiation of cellulosic pulps: understanding its impact on cellulose oxidation.
MedLine Citation:
PMID:  23151127     Owner:  NLM     Status:  Publisher    
Different pulp samples were irradiated by three energy sources: plasma, electron beaming, and gamma radiation. The effect of increased exposure to irradiation was studied by multi-detector gel permeation chromatography with fluorescence labeling of carbonyl groups to quantify changes of the cellulose. While plasma treatment had no effect, for gamma and electron beam the degradation primarily affects the high molar mass area. Kinetic calculations based on DPw were performed. They show close-to-linear relations with slopes in the same range of magnitude, suggesting that wood-derived pulps degrade slower than pulps from annual plants. The rise in carbonyl group content is linear with increasing dose. Especially in pulps from annual plants, most detected carbonyl structures originate from the new reducing end groups. Therefore, oxidative modification of cellulose molecules by means of radiation appears to be viable for pulps produced from wood. Here, the increase in oxidized functionalities is partially disconnected from chain scission.
Ute Henniges; Satoko Okubayashi; Thomas Rosenau; Antje Potthast
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-14
Journal Detail:
Title:  Biomacromolecules     Volume:  -     ISSN:  1526-4602     ISO Abbreviation:  Biomacromolecules     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100892849     Medline TA:  Biomacromolecules     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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