Lightweight materials by tailoring foam-fiber interactions

Annika Ketola, Wenchao Xiang, Tuomo Hjelt, Timo Lappalainen, Heikki Pajari, Tekla Tammelin, Orlando J. Rojas, Jukka A. Ketoja

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


We studied surface interactions in simplified fiber-foam systems with the captive bubble and fiber bed methods. The captive bubble technique was used to measure the bubble interaction with different cellulose model surfaces in sodium dodecyl sulfate (SDS) solution. The interaction of a single bubble with real fibers, submerged in SDS solution, was investigated using the fiber bed. Bubbles had clear adhesion to fiber surfaces in water, and the addition of SDS decreased this attraction. At high SDS concentration, the attraction was lost due to wetting transition. However, a smooth cellulose model surface did not attract bubbles even in the absence of surfactant. This suggests that the observed interaction with cellulose nanofibrils and fibers was caused by the presence of hydrophobic regions of the respective surface (e.g. lignin or nanobubbles).
Original languageEnglish
Title of host publicationProgress in Paper Physics Seminar
Subtitle of host publicationAbstract book of the PPPS2020 seminar
EditorsJarmo Kouko, Jani Lehto , Tero Tuovinen
PublisherVTT Technical Research Centre of Finland
ISBN (Electronic)978-951-38-8736-0
ISBN (Print)978-951-38-8738-4
Publication statusPublished - 1 Sept 2020
MoE publication typeA4 Article in a conference publication
EventProgress in Paper Physics Seminar, PPPS 2020 - Jyväskylä, Finland
Duration: 1 Sept 20203 Sept 2020

Publication series

SeriesVTT Technology


SeminarProgress in Paper Physics Seminar, PPPS 2020
Abbreviated titlePPPS2020


  • foam forming
  • cellulose
  • bubble-fibre interaction
  • model surface
  • captive bubble
  • wetting transition


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