Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Ari Jäsberg"'
Publikováno v:
BioResources, Vol 18, Iss 1, Pp 1398-1419 (2023)
A vacuum-assisted sheet former was used for analyzing water removal from refined bleached hardwood kraft pulp furnishes. The Schopper Riegler (SR) values of the studied furnishes ranged from 43 to 97. Water removal time increased significantly with i
Externí odkaz:
https://doaj.org/article/9e71b45092434314851c6b86510c4a22
Publikováno v:
SN Applied Sciences, Vol 3, Iss 12, Pp 1-12 (2021)
Abstract Mixing tanks are employed in paper and pulp industries to generate aqueous foams and fiber foams. The aim of the present study was to investigate the effect of impeller geometry on dynamic foam generation in a 60 L mixing tank. Three impelle
Externí odkaz:
https://doaj.org/article/e6ca4f927cba4997a9c83a6fa5526b7d
Publikováno v:
Jäsberg, A, Puisto, A, Leppänen, I, Koponen, A I & Alava, M J 2023, ' Online detection of orientation of cellulose nanocrystals in a capillary flow with polarization-sensitive optical coherence tomography ', Cellulose, vol. 30, no. 6, pp. 3539-3550 . https://doi.org/10.1007/s10570-023-05072-4
Funding Information: Open Access funding provided by Technical Research Centre of Finland (VTT). This work is part of the Academy of Finland’s Flagship Programme under Project numbers 318890 and 318891 (Competence Center for Materials Bioeconomy, F
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e56db0bf187792f0fe6ff7c6cbfad753
https://aaltodoc.aalto.fi/handle/123456789/120408
https://aaltodoc.aalto.fi/handle/123456789/120408
Publikováno v:
Jäsberg, A, Viitala, J, Tanaka, A, Prakash, B & Koponen, A I 2023, ' Flow rheology of light foams generated from aqueous solutions of polyvinyl alcohol ', Tappi Journal, vol. 22, no. 1, pp. 51-60 . https://doi.org/10.32964/TJ22.1.51
Recent studies have shown that foam-assisted application of additives into a wet web has advantages over the conventional way of adding the chemicals into the pulp suspension before forming, e.g., increased mechanical retention as well as high dosage
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef10e718658dbd0d6802ca4e98b77b44
https://cris.vtt.fi/en/publications/9be4f325-3e14-4623-8368-0983a0f8f28d
https://cris.vtt.fi/en/publications/9be4f325-3e14-4623-8368-0983a0f8f28d
Significant importance in the stiffness of materials, such as filaments and films, made of elongated components, has been attributed to orientation. Thus, the control of orientation during the manufacturing of materials has been the target of process
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bcdebca4fa3c9bfd37eccfd53312deb9
https://doi.org/10.21203/rs.3.rs-1623420/v1
https://doi.org/10.21203/rs.3.rs-1623420/v1
Autor:
Ulla Ojaniemi, Timo Pättikangas, Tuomas Turpeinen, Atsushi Tanaka, Marjo Järvinen, Annika Ketola, Ari Jäsberg, Antti Koponen
Publikováno v:
Jäsberg, A, Turpeinen, T, Tanaka, A, Ketola, A, Järvinen, M, Ojaniemi, U, Pättikangas, T & Koponen, A I 2022, ' Fouling Dynamics of Simulated Milk Ultrafiltrate on a Plate Heat Exchanger ', Heat Transfer Engineering, vol. 43, no. 15-16, pp. 1387-1395 . https://doi.org/10.1080/01457632.2021.1963550
In this paper, the first experimental results related to fouling taking place at heat exchangers during heat treatment of milk is presented. Instead of milk, simulated milk ultrafiltrate was used and the experiments were conducted in a simplified mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cec73b182afeea040761ee71a779b83c
https://cris.vtt.fi/en/publications/b2ede118-fe15-4e11-8c94-52f0124d6a9a
https://cris.vtt.fi/en/publications/b2ede118-fe15-4e11-8c94-52f0124d6a9a
Publikováno v:
Ojaniemi, U, Pättikangas, T, Jäsberg, A, Puhakka, E & Koponen, A I 2022, ' Computational Fluid Dynamics Simulation of Fouling of Plate Heat Exchanger by Phosphate Calcium ', Heat Transfer Engineering, vol. 43, no. 15-16, pp. 1396-1405 . https://doi.org/10.1080/01457632.2021.1963551
A computational fluid dynamics (CFD) model was developed for fouling of calcium phosphate in heat exchangers which can consider the tendency of fluid components to precipitate and the surface properties of the materials. In the CFD model the precipit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ba0c65f77681879a4116b921c519961
https://cris.vtt.fi/en/publications/03e22777-e469-4eea-85cd-2a4b6bdaca07
https://cris.vtt.fi/en/publications/03e22777-e469-4eea-85cd-2a4b6bdaca07
Autor:
Juha Salmela, Sanna Haavisto, Johanna Liukkonen, Tuomas Turpeinen, Antti Koponen, Ari Jäsberg
Publikováno v:
Turpeinen, T, Jäsberg, A, Haavisto, S, Liukkonen, J, Salmela, J & Koponen, A I 2020, ' Pipe rheology of microfibrillated cellulose suspensions ', Cellulose, vol. 27, no. 1, pp. 141-156 . https://doi.org/10.1007/s10570-019-02784-4
Cellulose
Cellulose
The shear rheology of two mechanically manufactured microfibrillated cellulose (MFC) suspensions was studied in a consistency range of 0.2–2.0% with a pipe rheometer combined with ultrasound velocity profiling. The MFC suspensions behaved at all co
Publikováno v:
Koponen, A, Eloranta, H, Jäsberg, A, Honkanen, M & Kiiskinen, H 2019, ' Real-time monitoring of bubble size distribution in a foam forming process ', Tappi Journal, vol. 18, no. 8, pp. 487-494 . https://doi.org/10.32964/TJ18.8.487
Foam forming is an intricate option to lessen fiber flocculation and to get better energy and water efficiency when making fiber-based products. Developed during the 1970s, this approach has recently received renewed attention, mainly because it also
Publikováno v:
Koponen, A I, Timofeev, O, Jäsberg, A & Kiiskinen, H 2020, ' Drainage of high-consistency fiber-laden aqueous foams ', Cellulose, vol. 27, pp. 9637–9652 . https://doi.org/10.1007/s10570-020-03416-y
Lightweight lignocellulosic fibrous materials (LLFMs) offer a sustainable and biodegradable alternative in many applications. Enthusiastic interest in these materials has recently grown together with the newly risen interest in foam forming. Foam bub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::943b62c6a9d0eddac8ded0e2f2acb4bc
https://cris.vtt.fi/en/publications/4c42b071-00c7-4fa9-b7f6-2117ad3198fa
https://cris.vtt.fi/en/publications/4c42b071-00c7-4fa9-b7f6-2117ad3198fa