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Akademický článek

Spray and foam application of chemical binders to pulp fiber airlaids

Autor: Sara Paunonen, Tuomo Hjelt, Taina Kamppuri, Harri Kiiskinen

Publikováno v: Journal of Engineered Fibers and Fabrics, Vol 17 (2022)

Pulp fiber airlaid nonwovens were bonded with three binder formulations in a spray and foam process. The binders were: a commercial acrylic dispersion binder, a commercial bio-containing acrylic binder; and a citric acid-carboxymethyl cellulose mixtu

Externí odkaz: https://doaj.org/article/49a8c953854140558564f3849e6d5294

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Chemical addition to wet webs using foam application

Autor: TUOMO HJELT, EMMI HENRIKSSON, AAYUSH KUMAR JAISWAL, ANTTI OKSANEN

Publikováno v: Hjelt, T, Henriksson, E, Jaiswal, A K & Oksanen, A 2023, ' Chemical addition to wet webs using foam application ', Tappi Journal, vol. 22, no. 1, pp. 33-39 . https://doi.org/10.32964/TJ22.1.33

In papermaking, the conventional way to add chemicals to the web is to dose them into the fiber stock and form the paper afterwards. However, in many cases, adding chemicals directly to the stock is challenging. For example, strength aids tend to inc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab95627614411ac9c351d0e0a5d1f797
https://cris.vtt.fi/en/publications/7b1f619e-2440-4037-98e0-22d4b4bc2b73

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Bubble Attachment to Cellulose and Silica Surfaces of Varied Surface Energies: Wetting Transition and Implications in Foam Forming

Autor: Heikki Pajari, Wenchao Xiang, Tuomo Hjelt, Annika Ketola, Tekla Tammelin, Jukka Ketoja, Orlando J. Rojas

Publikováno v: Ketola, A E, Xiang, W, Hjelt, T, Pajari, H, Tammelin, T, Rojas, O J & Ketoja, J A 2020, ' Bubble Attachment to Cellulose and Silica Surfaces of Varied Surface Energies : Wetting Transition and Implications in Foam Forming ', Langmuir, vol. 36, no. 26, pp. 7296-7308 . https://doi.org/10.1021/acs.langmuir.0c00682
Langmuir

* Ack:ssa mutta ei silti mukaan raportointiin | openaire: EC/H2020/788489/EU//BioElCell To better understand the complex system of wet foams in the presence of cellulosic fibers, we investigate bubble-surface interactions by following the effects of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6efbb8a3980c9aa8e3cc0da258c17ff
https://doi.org/10.1021/acs.langmuir.0c00682

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Surface Activity and Foaming Capacity of Aggregates Formed between an Anionic Surfactant and Non-Cellulosics Leached from Wood Fibers

Autor: Wenchao Xiang, Cosima Stubenrauch, Natalie Preisig, Christiane Laine, Tuomo Hjelt, Blaise L. Tardy, Orlando J. Rojas

Publikováno v: Biomacromolecules
Xiang, W, Preisig, N, Laine, C, Hjelt, T, Tardy, B L, Stubenrauch, C & Rojas, O J 2019, ' Surface Activity and Foaming Capacity of Aggregates Formed between an Anionic Surfactant and Non-Cellulosics Leached from Wood Fibers ', Biomacromolecules, vol. 20, no. 6, pp. 2286-2294 . https://doi.org/10.1021/acs.biomac.9b00243

[Image: see text] This study relates to the release of non-cellulosic components (cell wall heteropolysaccharides, lignin, and extractives) from swollen wood fibers in the presence of an anionic surfactant (sodium dodecyl sulfate, SDS) at submicellar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf87badfe753eca8eeb95a7ae9a43208
https://doi.org/10.1021/acs.biomac.9b00243

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Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography

Autor: Steven R. Burke, Matthias E. Möbius, Tuomo Hjelt, Stefan Hutzler, Jukka Ketoja

Publikováno v: Sn Applied Sciences
Burke, S R, Möbius, M E, Hjelt, T, Ketoja, J A & Hutzler, S 2021, ' Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography ', SN Applied Sciences, vol. 3, no. 2, 192 . https://doi.org/10.1007/s42452-021-04172-9

Abstract Foam-forming has in the past predominantly been used to create two-dimensional sheet-like fibrous materials. Allowing the foam to drain freely and decay under gravity, rather than applying a vacuum to remove it rapidly, we can produce lightw

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b7c3094536211f1f9721540d1777f48
http://europepmc.org/articles/PMC7829240

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Increased dryness after pressing and wet web strength by utilizing foam application technology

Autor: Kristian Salminen, Jani Lehmonen, Karita Kinnunen-Raudaskoski, Tuomo Hjelt

Publikováno v: Kinnunen-Raudaskoski, K, Salminen, K, Lehmonen, J & Hjelt, T 2016, ' Increased dryness after pressing and wet web strength by utilizing foam application technology ', Tappi Journal, vol. 15, no. 11, pp. 731-738 . < http://imisrise.tappi.org/TAPPI/Products/16/NOV/16NOV731.aspx >

Production cost savings by lowering basis weight has been a trend in papermaking. The strategy has been to decrease the amount of softwood kraft pulp and increase use of fillers and recycled fibers. These changes have a tendency to lower strength pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::157d466b067f0b62cd435ea45bc6a91f
https://doi.org/10.32964/tj15.11.731

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Properties of lightweight fibrous structures made by a novel foam forming technique

Autor: Matthias E. Möbius, Stefan Hutzler, Steven R. Burke, Tuomo Hjelt

Publikováno v: Burke, S R, Möbius, M E, Hjelt, T & Hutzler, S 2019, ' Properties of lightweight fibrous structures made by a novel foam forming technique ', Cellulose, vol. 26, no. 4, pp. 2529-2539 . https://doi.org/10.1007/s10570-018-2205-5

We describe a novel method for the production of lightweight fibrous structures of densities as low as 8.8 kg m $$^{-3}$$ . The method is based on the use of liquid foam as a carrier medium for dispersed Kraft fibres. Different to the process of foam

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dad556de3ff7880b6f520686a4b8cac
https://cris.vtt.fi/en/publications/e9ac64de-6cda-4965-9575-e568980951cf

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Porous structure of fibre networks formed by a foaming process: a comparative study of different characterization techniques

Autor: Tuomo Hjelt, Jussi Timonen, Jukka Ketoja, Ahmad M. Al-Qararah, Harri Kiiskinen, Axel Ekman

Publikováno v: Journal of Microscopy. 264:88-101

Recent developments in making fibre materials using the foam-forming technology have raised a need to characterize the porous structure at low material density. In order to find an effective choice among all structure-characterization methods, both t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7fa152a0870809162a604896f83059e8
https://doi.org/10.1111/jmi.12420

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Interactions of fibres with simple arrangements of soap films

Autor: Benjamin Haffner, Tuomo Hjelt, Stefan Hutzler, Atsushi Tanaka, David Whyte

Publikováno v: Whyte, D, Haffner, B, Tanaka, A, Hjelt, T & Hutzler, S 2017, ' Interactions of fibres with simple arrangements of soap films ', Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 534, pp. 112-119 . https://doi.org/10.1016/j.colsurfa.2017.02.037

We present experiments and Surface Evolver simulations concerning the interaction of fibres with simple arrangements of soap films, which constitute model systems for dry foams. For a fibre inserted into a soap film which spans two Plateau borders, o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c7824be14fe50cd3fa1a6b88386e843
https://cris.vtt.fi/en/publications/83b59b93-5daa-430c-97b8-485db8448f14

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