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Antti Nykänen
Researcher at Aalto University
Publications - 29
Citations - 3223
Antti Nykänen is an academic researcher from Aalto University. The author has contributed to research in topics: Copolymer & Self-healing hydrogels. The author has an hindex of 17, co-authored 29 publications receiving 2924 citations.
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Journal ArticleDOI
Enzymatic hydrolysis combined with mechanical shearing and high-pressure homogenization for nanoscale cellulose fibrils and strong gels.
Marjo Pääkkö,Mikael Ankerfors,Harri Kosonen,Antti Nykänen,Susanna Ahola,Monika Österberg,Janne Ruokolainen,Janne Laine,Per Tomas Larsson,Olli Ikkala,Tom Lindström +10 more
TL;DR: Mild enzymatic hydrolysis has been introduced and combined with mechanical shearing and a high-pressure homogenization, leading to a controlled fibrillation down to nanoscale and a network of long and highly entangled cellulose I elements.
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Effect of microfibrillated cellulose and fines on the drainage of kraft pulp suspension and paper strength
TL;DR: In this paper, different types of microfibrillated cellulose (MFC) and fines suspensions were produced, characterized, and then added to a paper-making pulp suspension, and the effects of salt concentration, pH, fixative type, dosage and type of fibrillar material on drainage were examined.
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Photoswitchable Superabsorbency Based on Nanocellulose Aerogels
Marjo Kettunen,Riitta Silvennoinen,Nikolay Houbenov,Antti Nykänen,Janne Ruokolainen,Jani Sainio,Viljami Pore,Marianna Kemell,Mikael Ankerfors,Tom Lindström,Mikko Ritala,Robin H. A. Ras,Olli Ikkala +12 more
TL;DR: In this article, a thin titanium dioxide (TiO2) film on lightweight native nanocellulose aerogels offers a novel type of functional material that shows photoswitching between water-superabsorbent and water-repellent states.
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Self-Assembled Structures in Diblock Copolymers with Hydrogen-Bonded Amphiphilic Plasticizing Compounds
Sami Valkama,Teemu Ruotsalainen,Antti Nykänen,Ari Laiho,Harri Kosonen,Gerrit ten Brinke,Olli Ikkala,Janne Ruokolainen +7 more
TL;DR: In this paper, the authors systematically search other hierarchies and phase transitions, a particular interest being hierarchies containing gyroid structures and the related order−order transitions, where poly(4-vinylpyridine) (P4VP) is used, where the pyridines are either directly hydrogen bonded with 3-pentadecylphenol (PDP) or first protonated with methanesulfonic acid (MSA).
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Hierarchical Porosity in Self-Assembled Polymers: Post-Modification of Block Copolymer-Phenolic Resin Complexes by Pyrolysis Allows the Control of Micro- and Mesoporosity
Sami Valkama,Antti Nykänen,Harri Kosonen,Ramasubbu Ramani,Filip Tuomisto,Peter Engelhardt,Gerrit ten Brinke,Olli Ikkala,Janne Ruokolainen +8 more
TL;DR: In this paper, self-assembled hierarchical porosity in organic polymers can be obtained in a facile manner based on pyrolyzed block-copolymer-phenolic resin nanocomposites and that a given starting composition can be post-modified in a wide range from monomodal mesoporous materials to hierarchical micro-mesoporous material with a high density of pores and large surface area per volume unit.