Exceptional pore size distribution in foam-formed fibre networks

Ahmad Al-Qararah (Corresponding Author), Tuomo Hjelt, Karita Kinnunen, Nikolai Beletski, Jukka Ketoja

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)

Abstract

Foam forming leads to sheet structures with exceptional volume of large pores. The link between fibre network structure and foam properties is investigated by comparing pore structure with measured bubble-size distribution. In foams produced by mechanical mixing, higher rotor speed leads to smaller average bubble size, whereas the effects coming from air content and surfactant are smaller and non-systematic. A significant drop in the average bubble size is seen when mixing fibres to foam. In sheets made with foam forming, there are more large pores compared to the water formed sheets. The size of these pores is affected by the sizes of the bubbles in the foam. Overall, pore size distribution is more strongly affected by the fibre type than by small changes in bubble size distribution.
Original languageEnglish
Pages (from-to)226-230
Number of pages4
JournalNordic Pulp and Paper Research Journal
Volume27
Issue number2
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

foams
foam
Pore size
bubbles
Foams
bubble
Fibers
rotors
Pore structure
Surface-Active Agents
surfactants
surfactant
fibre
Surface active agents
Rotors
air
Water
Air
water

Keywords

  • Bubble
  • fibre network
  • foam
  • pore
  • surfactant

Cite this

Al-Qararah, Ahmad ; Hjelt, Tuomo ; Kinnunen, Karita ; Beletski, Nikolai ; Ketoja, Jukka. / Exceptional pore size distribution in foam-formed fibre networks. In: Nordic Pulp and Paper Research Journal. 2012 ; Vol. 27, No. 2. pp. 226-230.
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Exceptional pore size distribution in foam-formed fibre networks. / Al-Qararah, Ahmad (Corresponding Author); Hjelt, Tuomo; Kinnunen, Karita; Beletski, Nikolai; Ketoja, Jukka.

In: Nordic Pulp and Paper Research Journal, Vol. 27, No. 2, 2012, p. 226-230.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Exceptional pore size distribution in foam-formed fibre networks

AU - Al-Qararah, Ahmad

AU - Hjelt, Tuomo

AU - Kinnunen, Karita

AU - Beletski, Nikolai

AU - Ketoja, Jukka

PY - 2012

Y1 - 2012

N2 - Foam forming leads to sheet structures with exceptional volume of large pores. The link between fibre network structure and foam properties is investigated by comparing pore structure with measured bubble-size distribution. In foams produced by mechanical mixing, higher rotor speed leads to smaller average bubble size, whereas the effects coming from air content and surfactant are smaller and non-systematic. A significant drop in the average bubble size is seen when mixing fibres to foam. In sheets made with foam forming, there are more large pores compared to the water formed sheets. The size of these pores is affected by the sizes of the bubbles in the foam. Overall, pore size distribution is more strongly affected by the fibre type than by small changes in bubble size distribution.

AB - Foam forming leads to sheet structures with exceptional volume of large pores. The link between fibre network structure and foam properties is investigated by comparing pore structure with measured bubble-size distribution. In foams produced by mechanical mixing, higher rotor speed leads to smaller average bubble size, whereas the effects coming from air content and surfactant are smaller and non-systematic. A significant drop in the average bubble size is seen when mixing fibres to foam. In sheets made with foam forming, there are more large pores compared to the water formed sheets. The size of these pores is affected by the sizes of the bubbles in the foam. Overall, pore size distribution is more strongly affected by the fibre type than by small changes in bubble size distribution.

KW - Bubble

KW - fibre network

KW - foam

KW - pore

KW - surfactant

U2 - 10.3183/NPPRJ-2012-27-02-p226-230

DO - 10.3183/NPPRJ-2012-27-02-p226-230

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JO - Nordic Pulp and Paper Research Journal

JF - Nordic Pulp and Paper Research Journal

SN - 0283-2631

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