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- Thad C. Maloney
- Department of Forest Products Technology, Aalto University, Vuorimiehentie 1, Espoo, Finland,
説明
<jats:title>Abstract:</jats:title> <jats:p>This study examines the swelling of TEMPO-oxidized nanofibrillated cellulose (NFC<jats:sub>TEMPO</jats:sub>, shortly NFC) on both the particle and interparticle levels. The sum of the intraparticle and interparticle swelling is referred to as the network swelling. A centrifugal method, based on a modification of the water retention value test, was used to measure the network swelling of NFC, a pigment, and some pulp fibers. It was found that the network swelling of NFC is highly dependent on its concentration within a fiber matrix. The particle swelling of NFC and pulp fibers was analyzed by differential scanning calorimetry (DSC) and solute exclusion. The counterion for the NFC varied among the Na<jats:sup>+</jats:sup>, H<jats:sup>+</jats:sup>, and Ca<jats:sup>2+</jats:sup> forms. The counterion has a very large effect on the particle and network swelling of NFC, with Ca<jats:sup>2+</jats:sup> giving the lowest swelling and Na<jats:sup>+</jats:sup> the highest swelling. An industrially feasible method for changing the counterion of NFC from the nominal Na<jats:sup>+</jats:sup> to the Ca<jats:sup>2+</jats:sup> form, and thus improving dewatering properties, is given.</jats:p>
収録刊行物
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- Holzforschung
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Holzforschung 69 (2), 207-213, 2014-06-15
Walter de Gruyter GmbH
