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09.02.2018 | Original Paper

The investigation of rheological and strength properties of NFC hydrogels and aerogels from hardwood pulp by short catalytic bleaching (H_cat)

verfasst von: Ghazaleh Afsahi, Katarina Dimic-Misic, Patrick Gane, Tatiana Budtova, Thaddeus Maloney, Tapani Vuorinen

Erschienen in: Cellulose | Ausgabe 3/2018

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Abstract

Alkaline washed nanofibrillated cellulose (NFC) was obtained via TEMPO-mediation of hardwood pulp which had been short catalytically bleached (H_cat) under a controlled range of conditions. With careful combination of bleaching conditions, together with the subsequent alkali pre-treatment prior to TEMPO oxidation, it is possible to reduce xylan content of H_cat hardwood birch pulps as compared to traditional elemental chlorine free (ECF) bleaching. The defined amount of xylan is seen to affect the static water-holding and agglomeration state of the respective NFC. It is shown that colloidal interactions between the nanofibrils are dependent on the amount of water present in the NFC hydrogels as water retained within xylan induced swelling of the fibrils that resulted in a weaker aerogel structure.

Vorheriger Artikel Microemulsion phase formation at oil–cellulose microcrystal suspension interfaces

Nächster Artikel Calcium alginate beads reinforced with synthetic oligomers, linear polyethylenimine and Cu(II): structural stability and potential applications

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Titel: The investigation of rheological and strength properties of NFC hydrogels and aerogels from hardwood pulp by short catalytic bleaching (Hcat)
verfasst von: Ghazaleh Afsahi
Katarina Dimic-Misic
Patrick Gane
Tatiana Budtova
Thaddeus Maloney
Tapani Vuorinen
Publikationsdatum: 09.02.2018
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 3/2018
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-018-1678-6

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