Characterization of dissolving pulp by fibre swelling in dilute cupriethylenediamine (CUEN) solution in a MorFi analyser
The swelling of dissolving pulps has been investigated by a new method based on the Morfi analyser, which is measuring the width variation of thousands of fibres in a cupriethylenediamine (CUEN) solution in a few minutes. Pulps from various origins were analysed coming from softwood, birch wood, euc...
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Veröffentlicht in: | Holzforschung 2016-07, Vol.70 (7), p.611-617 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The swelling of dissolving pulps has been investigated by a new method based on the Morfi
analyser, which is measuring the width variation of thousands of fibres in a cupriethylenediamine (CUEN) solution in a few minutes. Pulps from various origins were analysed coming from softwood, birch wood, eucalyptus wood, kraft pulps, sulphite pulps and ECF and TCF bleached pulps, which were modified by several treatments including chemical (cold caustic extraction, hypochlorite) or enzymatic (cellulase) methods. The swelling was much affected by the crystalline form of cellulose and the hemicellulose content but did not depend neither on the cellulose DP nor on the fibre structure (hardwood vs. softwood). The dissolving pulp reactivity in the viscose process was also assessed by swelling in dilute solutions of cupriethylenediamine (CUEN) instead of the Fock’s method. |
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ISSN: | 0018-3830 1437-434X |
DOI: | 10.1515/hf-2015-0167 |