A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Online measurement of floc size, viscosity, and consistency of cellulose microfibril suspensions with optical coherence tomography (2021)
Lauri, J., Haavisto, S., Salmela, J., Miettinen, A., Fabritius, T., & Koponen, A. I. (2021). Online measurement of floc size, viscosity, and consistency of cellulose microfibril suspensions with optical coherence tomography. Cellulose, 28(6), 3373-3387. https://doi.org/10.1007/s10570-021-03745-6
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Lauri, Janne; Haavisto, Sanna; Salmela, Juha; Miettinen, Arttu; Fabritius, Tapio; Koponen, Antti I.
Lehti tai sarja: Cellulose
ISSN: 0969-0239
eISSN: 1572-882X
Julkaisuvuosi: 2021
Ilmestymispäivä: 18.02.2021
Volyymi: 28
Lehden numero: 6
Artikkelin sivunumerot: 3373-3387
Kustantaja: Springer
Julkaisumaa: Alankomaat
Julkaisun kieli: englanti
DOI: https://doi.org/10.1007/s10570-021-03745-6
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/74353
Tiivistelmä
In this study, cellulose microfibril (CMF) suspensions were imaged during pipe flow at consistencies of 0.4%, 1.0%, and 1.6% with optical coherence tomography (OCT) to obtain images of the structure and the local velocity of the suspension. The viscosities obtained by combining pressure loss measurement with the OCT velocity data showed typical shear thinning behavior and were in excellent agreement with viscosities obtained with ultrasound velocity profiling. The structural OCT images were used to calculate the radial and the axial floc sizes of the suspension. A fit of power law to the geometrical floc size–shear stress data gave the same power law index for all consistencies, suggesting that floc rupture dynamics is independent of consistency. The dependence of viscosity and floc size on shear stress was similar, indicating that the shear thinning behavior of CMF suspensions is closely related to the rupture dynamics of flocs. The results also showed that an apparent attenuation coefficient of the OCT signal can be used to determine the consistency of CMF suspensions.
YSO-asiasanat: selluloosa; mikrokuidut; suspensiot; reologia; viskositeetti; optinen koherenssitomografia
Vapaat asiasanat: cellulose microfibrils; CMF; rheology; viscosity; flocculation; floc size; consistency; optical coherence tomography; OCT
Liittyvät organisaatiot
OKM-raportointi: Kyllä
VIRTA-lähetysvuosi: 2021
JUFO-taso: 2
