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

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Bibtex - Lataa

@article{36a04988720741c68125515876d44bb5,
title = "The investigation of rheological and strength properties of NFC hydrogels and aerogels from hardwood pulp by short catalytic bleaching (Hcat)",
abstract = "Alkaline washed nanofibrillated cellulose (NFC) was obtained via TEMPO-mediation of hardwood pulp which had been short catalytically bleached (Hcat) 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 Hcat 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.",
keywords = "Aerogel, H bleaching, Mechanical properties of aerogels, Nanocellulose, Rheology, Water sorption, Xylan content",
author = "Ghazaleh Afsahi and Katarina Dimic-Misic and Patrick Gane and Tatiana Budtova and Thaddeus Maloney and Tapani Vuorinen",
year = "2018",
month = "2",
doi = "10.1007/s10570-018-1678-6",
language = "English",
volume = "25",
pages = "1637–1655",
journal = "Cellulose",
issn = "0969-0239",
number = "3",

}

RIS - Lataa

TY - JOUR

T1 - The investigation of rheological and strength properties of NFC hydrogels and aerogels from hardwood pulp by short catalytic bleaching (Hcat)

AU - Afsahi, Ghazaleh

AU - Dimic-Misic, Katarina

AU - Gane, Patrick

AU - Budtova, Tatiana

AU - Maloney, Thaddeus

AU - Vuorinen, Tapani

PY - 2018/2

Y1 - 2018/2

N2 - Alkaline washed nanofibrillated cellulose (NFC) was obtained via TEMPO-mediation of hardwood pulp which had been short catalytically bleached (Hcat) 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 Hcat 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.

AB - Alkaline washed nanofibrillated cellulose (NFC) was obtained via TEMPO-mediation of hardwood pulp which had been short catalytically bleached (Hcat) 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 Hcat 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.

KW - Aerogel

KW - H bleaching

KW - Mechanical properties of aerogels

KW - Nanocellulose

KW - Rheology

KW - Water sorption

KW - Xylan content

UR - http://www.scopus.com/inward/record.url?scp=85041858859&partnerID=8YFLogxK

U2 - 10.1007/s10570-018-1678-6

DO - 10.1007/s10570-018-1678-6

M3 - Article

VL - 25

SP - 1637

EP - 1655

JO - Cellulose

JF - Cellulose

SN - 0969-0239

IS - 3

ER -

ID: 17823100