Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The state of carboxymethylated nanofibrils after homogenization-aided dilution from concentrated suspensions: A rheological perspective
RISE., Innventia.
RISE., Innventia.
KTH Royal Institute of Technology, Sweden.
2014 (Engelska)Ingår i: Cellulose, ISSN 0969-0239, E-ISSN 1572-882X, Vol. 21, nr 4, s. 2357-2368Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The rheological properties of a carboxymethylated (D.S. ≈ 0.1) nanofibrillated cellulose (NFC) were investigated at different solid contents. The critical overlap concentration was determined to be in the range between 0.04 and 0.07 % (w/w) using shear stress versus shear rate measurements. From the critical overlap concentration using the simple Mason excluded volume formalism, the apparent aspect ratio was estimated to be 75 [at a critical overlap concentration of 0.04 % (w/w)]. The aspect ratio of the NFC system was also estimated by using the Einstein-Simha equation together with the intrinsic viscosity value of the system (corrected for the electroviscous effects). The obtained value was found to be around 80, which is in good agreement with the value obtained from the excluded volume calculation. Further, by combining oscillatory measurements and the equation of Shankar et al. the apparent fibril length was determined to be 4 μm. As the production of NFC through homogenization occurs at concentrations far above the critical overlap concentration an NFC-gel is constituted by a severely entangled structure. The disentanglement of the fibrils is therefore difficult and the employed dilution method was found not to lead to fully liberated nanofibrils, which was also indicated by atomic force microscopy-imaging.

Ort, förlag, år, upplaga, sidor
2014. Vol. 21, nr 4, s. 2357-2368
Nationell ämneskategori
Polymerteknologi Materialteknik
Identifikatorer
URN: urn:nbn:se:ri:diva-9807DOI: 10.1007/s10570-014-0329-9Scopus ID: 2-s2.0-84904309327OAI: oai:DiVA.org:ri-9807DiVA, id: diva2:968592
Tillgänglig från: 2016-09-12 Skapad: 2016-09-12 Senast uppdaterad: 2022-05-10Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus
Av organisationen
Innventia
I samma tidskrift
Cellulose
PolymerteknologiMaterialteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 26 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf