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Ranking mechanical pulps for their potential to photoyellowAuthor(s): Umesh P. Agarwal
Source: Sixth European Workshop on Lignocellulosics and Pulp : Sept. 3-6, 2000, Bordeaux, France. Bordeaux, France : Bordeaux Universite, 2000: Pages 95-98
Publication Series: Miscellaneous Publication
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DescriptionRecently found experimental evidence has provided strong support for an alternative photoyellowing mechanism that suggests that pulp- photoyellowing occurs due to direct photooxidation of hydroquinones (present in mechanical pulps) top-quinones. Because hydroquinones were found to be present in pulps, it may be possible to quantify them. Quantification of mechanical-pulp hydroquinones is important because it would provide information on a pulp's potential for photoyellowing. One of the ways to accomplish this is to use the method that successfully detected hydroquinones, namely the method of "oxygensensitivity of laser- induced-fluorescence (LIF)". Preliminary findings of this work will be discussed in the presentation.
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CitationAgarwal, Umesh P. 2000. Ranking mechanical pulps for their potential to photoyellow. Sixth European Workshop on Lignocellulosics and Pulp : Sept. 3-6, 2000, Bordeaux, France. Bordeaux, France : Bordeaux Universite, 2000: Pages 95-98
KeywordsMechanical pulps, photoyellowing
- Predicting photoyellowing behaviour of mechanical pulp containing papers
- On the importance of hydroquinone/p-quinone redox system in the photoyellowing of mechanical pulps
- Evaluating chemical-, mechanical-, and bio-pulping processes and their sustainability characterization using life cycle assessment
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