P
Paavo A. Penttilä
Researcher at Aalto University
Publications - 60
Citations - 1491
Paavo A. Penttilä is an academic researcher from Aalto University. The author has contributed to research in topics: Cellulose & Microfibril. The author has an hindex of 19, co-authored 52 publications receiving 1086 citations. Previous affiliations of Paavo A. Penttilä include University of Helsinki & VTT Technical Research Centre of Finland.
Papers
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Journal ArticleDOI
Degradation and Crystallization of Cellulose in Hydrogen Chloride Vapor for High-Yield Isolation of Cellulose Nanocrystals
Eero Kontturi,Anne Meriluoto,Paavo A. Penttilä,Niki Baccile,Jani-Markus Malho,Antje Potthast,Thomas Rosenau,Janne Ruokolainen,Ritva Serimaa,Janne Laine,Herbert Sixta +10 more
TL;DR: It is shown how the exposure of plant-based fibers to HCl vapor results in rapid degradation with simultaneous crystallization, which serves as a starting point for the solid-state tuning of the supramolecular properties of morphologically heterogeneous biological materials.
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Amorphous characteristics of an ultrathin cellulose film.
Eero Kontturi,Miroslav Suchy,Paavo A. Penttilä,Bruno Jean,Kari Pirkkalainen,Mika Torkkeli,Ritva Serimaa +6 more
TL;DR: The surprising susceptibility to dissolve in dilute NaOH was hypothetically attributed to the lack of hierarchical morphology in the amorphous film.
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Xylan as limiting factor in enzymatic hydrolysis of nanocellulose
Paavo A. Penttilä,Anikó Várnai,Jaakko Pere,Tekla Tammelin,Lennart Salmén,Matti Siika-aho,Liisa Viikari,Ritva Serimaa +7 more
TL;DR: The presence of loosely bound xylan seemed to limit the hydrolysis of crystalline cellulose, indicated by an increase in cellulose crystallinity and by preserved crystal width measured with wide-angle X-ray scattering.
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Use of amaranth, quinoa and kañiwa in extruded corn-based snacks
Jose Martin Ramos Diaz,Satu Kirjoranta,Seppo Tenitz,Paavo A. Penttilä,Ritva Serimaa,Anna-Maija Lampi,Kirsi Jouppila +6 more
TL;DR: A co-rotating twin screw extruder was used to obtain corn-based extrudates containing amaranth/quinoa/kaniwa (20% of solids) as mentioned in this paper.
Journal ArticleDOI
Nanofibrillated cellulose/carboxymethyl cellulose composite with improved wet strength
Nikolaos Pahimanolis,Arto Salminen,Paavo A. Penttilä,Juuso T. Korhonen,Leena-Sisko Johansson,Janne Ruokolainen,Ritva Serimaa,Jukka Seppälä +7 more
TL;DR: In this paper, nanofibrillated cellulose/carboxymethyl cellulose (CMC) composite films were prepared using tape casting, and the obtained transparent films showed shear induced partial alignment of fibrils along the casting direction, resulting in birefringence in cross polarized light.